Remove derives `Encodable`/`Decodable` and unstabilize attribute `#[bench]`

2 files changed, 198 insertions, 197 deletions

diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.rs b/src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.rs
index 3187b4cae55..6d51bb3f8ad 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.rs
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.rs
@@ -32,6 +32,7 @@
 
 // check-pass
 
+#![feature(test)]
 #![warn(unused_attributes, unknown_lints)]
 
 // UNGATED WHITE-LISTED BUILT-IN ATTRIBUTES
diff --git a/src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.stderr b/src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.stderr
index a0b770e9711..864df35a79f 100644
--- a/src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.stderr
+++ b/src/test/ui/feature-gate/issue-43106-gating-of-builtin-attrs.stderr
@@ -1,185 +1,185 @@
 warning: unknown lint: `x5400`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:39:9
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:40:9
    |
 LL | #![warn(x5400)]
    |         ^^^^^
    |
 note: lint level defined here
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:35:28
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:36:28
    |
 LL | #![warn(unused_attributes, unknown_lints)]
    |                            ^^^^^^^^^^^^^
 
 warning: unknown lint: `x5300`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:40:10
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:41:10
    |
 LL | #![allow(x5300)]
    |          ^^^^^
 
 warning: unknown lint: `x5200`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:41:11
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:42:11
    |
 LL | #![forbid(x5200)]
    |           ^^^^^
 
 warning: unknown lint: `x5100`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:42:9
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:43:9
    |
 LL | #![deny(x5100)]
    |         ^^^^^
 
 warning: unknown lint: `x5400`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:100:8
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:101:8
    |
 LL | #[warn(x5400)]
    |        ^^^^^
 
 warning: unknown lint: `x5400`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:103:25
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:104:25
    |
 LL |     mod inner { #![warn(x5400)] }
    |                         ^^^^^
 
 warning: unknown lint: `x5400`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:106:12
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:107:12
    |
 LL |     #[warn(x5400)] fn f() { }
    |            ^^^^^
 
 warning: unknown lint: `x5400`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:109:12
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:110:12
    |
 LL |     #[warn(x5400)] struct S;
    |            ^^^^^
 
 warning: unknown lint: `x5400`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:112:12
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:113:12
    |
 LL |     #[warn(x5400)] type T = S;
    |            ^^^^^
 
 warning: unknown lint: `x5400`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:115:12
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:116:12
    |
 LL |     #[warn(x5400)] impl S { }
    |            ^^^^^
 
 warning: unknown lint: `x5300`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:119:9
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:120:9
    |
 LL | #[allow(x5300)]
    |         ^^^^^
 
 warning: unknown lint: `x5300`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:122:26
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:123:26
    |
 LL |     mod inner { #![allow(x5300)] }
    |                          ^^^^^
 
 warning: unknown lint: `x5300`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:125:13
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:126:13
    |
 LL |     #[allow(x5300)] fn f() { }
    |             ^^^^^
 
 warning: unknown lint: `x5300`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:128:13
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:129:13
    |
 LL |     #[allow(x5300)] struct S;
    |             ^^^^^
 
 warning: unknown lint: `x5300`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:131:13
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:132:13
    |
 LL |     #[allow(x5300)] type T = S;
    |             ^^^^^
 
 warning: unknown lint: `x5300`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:134:13
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:135:13
    |
 LL |     #[allow(x5300)] impl S { }
    |             ^^^^^
 
 warning: unknown lint: `x5200`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:138:10
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:139:10
    |
 LL | #[forbid(x5200)]
    |          ^^^^^
 
 warning: unknown lint: `x5200`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:141:27
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:142:27
    |
 LL |     mod inner { #![forbid(x5200)] }
    |                           ^^^^^
 
 warning: unknown lint: `x5200`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:144:14
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:145:14
    |
 LL |     #[forbid(x5200)] fn f() { }
    |              ^^^^^
 
 warning: unknown lint: `x5200`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:147:14
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:148:14
    |
 LL |     #[forbid(x5200)] struct S;
    |              ^^^^^
 
 warning: unknown lint: `x5200`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:150:14
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:151:14
    |
 LL |     #[forbid(x5200)] type T = S;
    |              ^^^^^
 
 warning: unknown lint: `x5200`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:153:14
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:154:14
    |
 LL |     #[forbid(x5200)] impl S { }
    |              ^^^^^
 
 warning: unknown lint: `x5100`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:157:8
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:158:8
    |
 LL | #[deny(x5100)]
    |        ^^^^^
 
 warning: unknown lint: `x5100`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:160:25
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:161:25
    |
 LL |     mod inner { #![deny(x5100)] }
    |                         ^^^^^
 
 warning: unknown lint: `x5100`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:163:12
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:164:12
    |
 LL |     #[deny(x5100)] fn f() { }
    |            ^^^^^
 
 warning: unknown lint: `x5100`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:166:12
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:167:12
    |
 LL |     #[deny(x5100)] struct S;
    |            ^^^^^
 
 warning: unknown lint: `x5100`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:169:12
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:170:12
    |
 LL |     #[deny(x5100)] type T = S;
    |            ^^^^^
 
 warning: unknown lint: `x5100`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:172:12
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:173:12
    |
 LL |     #[deny(x5100)] impl S { }
    |            ^^^^^
 
 warning: macro_escape is a deprecated synonym for macro_use
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:456:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:457:1
    |
 LL | #[macro_escape]
    | ^^^^^^^^^^^^^^^
 
 warning: macro_escape is a deprecated synonym for macro_use
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:459:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:460:17
    |
 LL |     mod inner { #![macro_escape] }
    |                 ^^^^^^^^^^^^^^^^
@@ -187,7 +187,7 @@ LL |     mod inner { #![macro_escape] }
    = help: consider an outer attribute, `#[macro_use]` mod ...
 
 warning: the feature `rust1` has been stable since 1.0.0 and no longer requires an attribute to enable
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:89:12
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:90:12
    |
 LL | #![feature(rust1)]
    |            ^^^^^
@@ -195,991 +195,991 @@ LL | #![feature(rust1)]
    = note: `#[warn(stable_features)]` on by default
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:180:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:181:5
    |
 LL |     #[macro_use] fn f() { }
    |     ^^^^^^^^^^^^
    |
 note: lint level defined here
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:35:9
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:36:9
    |
 LL | #![warn(unused_attributes, unknown_lints)]
    |         ^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:183:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:184:5
    |
 LL |     #[macro_use] struct S;
    |     ^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:186:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:187:5
    |
 LL |     #[macro_use] type T = S;
    |     ^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:189:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:190:5
    |
 LL |     #[macro_use] impl S { }
    |     ^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:196:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:197:17
    |
 LL |     mod inner { #![macro_export] }
    |                 ^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:199:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:200:5
    |
 LL |     #[macro_export] fn f() { }
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:202:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:203:5
    |
 LL |     #[macro_export] struct S;
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:205:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:206:5
    |
 LL |     #[macro_export] type T = S;
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:208:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:209:5
    |
 LL |     #[macro_export] impl S { }
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:193:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:194:1
    |
 LL | #[macro_export]
    | ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:215:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:216:17
    |
 LL |     mod inner { #![plugin_registrar] }
    |                 ^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:220:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:221:5
    |
 LL |     #[plugin_registrar] struct S;
    |     ^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:223:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:224:5
    |
 LL |     #[plugin_registrar] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:226:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:227:5
    |
 LL |     #[plugin_registrar] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:212:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:213:1
    |
 LL | #[plugin_registrar]
    | ^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:233:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:234:17
    |
 LL |     mod inner { #![main] }
    |                 ^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:238:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:239:5
    |
 LL |     #[main] struct S;
    |     ^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:241:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:242:5
    |
 LL |     #[main] type T = S;
    |     ^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:244:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:245:5
    |
 LL |     #[main] impl S { }
    |     ^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:230:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:231:1
    |
 LL | #[main]
    | ^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:251:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:252:17
    |
 LL |     mod inner { #![start] }
    |                 ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:256:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:257:5
    |
 LL |     #[start] struct S;
    |     ^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:259:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:260:5
    |
 LL |     #[start] type T = S;
    |     ^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:262:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:263:5
    |
 LL |     #[start] impl S { }
    |     ^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:248:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:249:1
    |
 LL | #[start]
    | ^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:315:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:316:5
    |
 LL |     #[path = "3800"] fn f() { }
    |     ^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:318:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:319:5
    |
 LL |     #[path = "3800"]  struct S;
    |     ^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:321:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:322:5
    |
 LL |     #[path = "3800"] type T = S;
    |     ^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:324:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:325:5
    |
 LL |     #[path = "3800"] impl S { }
    |     ^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:331:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:332:17
    |
 LL |     mod inner { #![automatically_derived] }
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:334:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:335:5
    |
 LL |     #[automatically_derived] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:337:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:338:5
    |
 LL |     #[automatically_derived] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:340:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:341:5
    |
 LL |     #[automatically_derived] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:343:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:344:5
    |
 LL |     #[automatically_derived] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:328:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:329:1
    |
 LL | #[automatically_derived]
    | ^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:363:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:364:17
    |
 LL |     mod inner { #![no_link] }
    |                 ^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:366:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:367:5
    |
 LL |     #[no_link] fn f() { }
    |     ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:369:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:370:5
    |
 LL |     #[no_link] struct S;
    |     ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:372:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:373:5
    |
 LL |     #[no_link]type T = S;
    |     ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:375:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:376:5
    |
 LL |     #[no_link] impl S { }
    |     ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:360:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:361:1
    |
 LL | #[no_link]
    | ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:382:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:383:17
    |
 LL |     mod inner { #![should_panic] }
    |                 ^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:385:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:386:5
    |
 LL |     #[should_panic] fn f() { }
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:388:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:389:5
    |
 LL |     #[should_panic] struct S;
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:391:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:392:5
    |
 LL |     #[should_panic] type T = S;
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:394:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:395:5
    |
 LL |     #[should_panic] impl S { }
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:379:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:380:1
    |
 LL | #[should_panic]
    | ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:401:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:402:17
    |
 LL |     mod inner { #![ignore] }
    |                 ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:404:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:405:5
    |
 LL |     #[ignore] fn f() { }
    |     ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:407:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:408:5
    |
 LL |     #[ignore] struct S;
    |     ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:410:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:411:5
    |
 LL |     #[ignore] type T = S;
    |     ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:413:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:414:5
    |
 LL |     #[ignore] impl S { }
    |     ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:398:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:399:1
    |
 LL | #[ignore]
    | ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:420:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:421:17
    |
 LL |     mod inner { #![no_implicit_prelude] }
    |                 ^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:423:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:424:5
    |
 LL |     #[no_implicit_prelude] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:426:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:427:5
    |
 LL |     #[no_implicit_prelude] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:429:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:430:5
    |
 LL |     #[no_implicit_prelude] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:432:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:433:5
    |
 LL |     #[no_implicit_prelude] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:417:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:418:1
    |
 LL | #[no_implicit_prelude]
    | ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:439:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:440:17
    |
 LL |     mod inner { #![reexport_test_harness_main="2900"] }
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:442:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:443:5
    |
 LL |     #[reexport_test_harness_main = "2900"] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:445:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:446:5
    |
 LL |     #[reexport_test_harness_main = "2900"] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:448:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:449:5
    |
 LL |     #[reexport_test_harness_main = "2900"] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:451:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:452:5
    |
 LL |     #[reexport_test_harness_main = "2900"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:436:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:437:1
    |
 LL | #[reexport_test_harness_main = "2900"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:462:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:463:5
    |
 LL |     #[macro_escape] fn f() { }
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:465:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:466:5
    |
 LL |     #[macro_escape] struct S;
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:468:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:469:5
    |
 LL |     #[macro_escape] type T = S;
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:471:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:472:5
    |
 LL |     #[macro_escape] impl S { }
    |     ^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:479:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:480:17
    |
 LL |     mod inner { #![no_std] }
    |                 ^^^^^^^^^^
 
 warning: crate-level attribute should be in the root module
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:479:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:480:17
    |
 LL |     mod inner { #![no_std] }
    |                 ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:483:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:484:5
    |
 LL |     #[no_std] fn f() { }
    |     ^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:483:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:484:5
    |
 LL |     #[no_std] fn f() { }
    |     ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:487:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:488:5
    |
 LL |     #[no_std] struct S;
    |     ^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:487:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:488:5
    |
 LL |     #[no_std] struct S;
    |     ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:491:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:492:5
    |
 LL |     #[no_std] type T = S;
    |     ^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:491:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:492:5
    |
 LL |     #[no_std] type T = S;
    |     ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:495:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:496:5
    |
 LL |     #[no_std] impl S { }
    |     ^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:495:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:496:5
    |
 LL |     #[no_std] impl S { }
    |     ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:475:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:476:1
    |
 LL | #[no_std]
    | ^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:475:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:476:1
    |
 LL | #[no_std]
    | ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:634:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:635:17
    |
 LL |     mod inner { #![crate_name="0900"] }
    |                 ^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be in the root module
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:634:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:635:17
    |
 LL |     mod inner { #![crate_name="0900"] }
    |                 ^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:638:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:639:5
    |
 LL |     #[crate_name = "0900"] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:638:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:639:5
    |
 LL |     #[crate_name = "0900"] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:642:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:643:5
    |
 LL |     #[crate_name = "0900"] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:642:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:643:5
    |
 LL |     #[crate_name = "0900"] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:646:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:647:5
    |
 LL |     #[crate_name = "0900"] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:646:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:647:5
    |
 LL |     #[crate_name = "0900"] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:650:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:651:5
    |
 LL |     #[crate_name = "0900"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:650:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:651:5
    |
 LL |     #[crate_name = "0900"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:630:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:631:1
    |
 LL | #[crate_name = "0900"]
    | ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:630:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:631:1
    |
 LL | #[crate_name = "0900"]
    | ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:659:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:660:17
    |
 LL |     mod inner { #![crate_type="0800"] }
    |                 ^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be in the root module
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:659:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:660:17
    |
 LL |     mod inner { #![crate_type="0800"] }
    |                 ^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:663:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:664:5
    |
 LL |     #[crate_type = "0800"] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:663:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:664:5
    |
 LL |     #[crate_type = "0800"] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:667:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:668:5
    |
 LL |     #[crate_type = "0800"] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:667:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:668:5
    |
 LL |     #[crate_type = "0800"] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:671:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:672:5
    |
 LL |     #[crate_type = "0800"] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:671:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:672:5
    |
 LL |     #[crate_type = "0800"] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:675:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:676:5
    |
 LL |     #[crate_type = "0800"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:675:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:676:5
    |
 LL |     #[crate_type = "0800"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:655:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:656:1
    |
 LL | #[crate_type = "0800"]
    | ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:655:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:656:1
    |
 LL | #[crate_type = "0800"]
    | ^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:684:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:685:17
    |
 LL |     mod inner { #![feature(x0600)] }
    |                 ^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be in the root module
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:684:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:685:17
    |
 LL |     mod inner { #![feature(x0600)] }
    |                 ^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:688:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:689:5
    |
 LL |     #[feature(x0600)] fn f() { }
    |     ^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:688:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:689:5
    |
 LL |     #[feature(x0600)] fn f() { }
    |     ^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:692:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:693:5
    |
 LL |     #[feature(x0600)] struct S;
    |     ^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:692:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:693:5
    |
 LL |     #[feature(x0600)] struct S;
    |     ^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:696:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:697:5
    |
 LL |     #[feature(x0600)] type T = S;
    |     ^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:696:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:697:5
    |
 LL |     #[feature(x0600)] type T = S;
    |     ^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:700:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:701:5
    |
 LL |     #[feature(x0600)] impl S { }
    |     ^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:700:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:701:5
    |
 LL |     #[feature(x0600)] impl S { }
    |     ^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:680:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:681:1
    |
 LL | #[feature(x0600)]
    | ^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:680:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:681:1
    |
 LL | #[feature(x0600)]
    | ^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:710:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:711:17
    |
 LL |     mod inner { #![no_main] }
    |                 ^^^^^^^^^^^
 
 warning: crate-level attribute should be in the root module
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:710:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:711:17
    |
 LL |     mod inner { #![no_main] }
    |                 ^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:714:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:715:5
    |
 LL |     #[no_main] fn f() { }
    |     ^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:714:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:715:5
    |
 LL |     #[no_main] fn f() { }
    |     ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:718:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:719:5
    |
 LL |     #[no_main] struct S;
    |     ^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:718:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:719:5
    |
 LL |     #[no_main] struct S;
    |     ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:722:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:723:5
    |
 LL |     #[no_main] type T = S;
    |     ^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:722:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:723:5
    |
 LL |     #[no_main] type T = S;
    |     ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:726:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:727:5
    |
 LL |     #[no_main] impl S { }
    |     ^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:726:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:727:5
    |
 LL |     #[no_main] impl S { }
    |     ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:706:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:707:1
    |
 LL | #[no_main]
    | ^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:706:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:707:1
    |
 LL | #[no_main]
    | ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:748:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:749:17
    |
 LL |     mod inner { #![recursion_limit="0200"] }
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be in the root module
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:748:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:749:17
    |
 LL |     mod inner { #![recursion_limit="0200"] }
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:752:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:753:5
    |
 LL |     #[recursion_limit="0200"] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:752:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:753:5
    |
 LL |     #[recursion_limit="0200"] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:756:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:757:5
    |
 LL |     #[recursion_limit="0200"] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:756:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:757:5
    |
 LL |     #[recursion_limit="0200"] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:760:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:761:5
    |
 LL |     #[recursion_limit="0200"] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:760:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:761:5
    |
 LL |     #[recursion_limit="0200"] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:764:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:765:5
    |
 LL |     #[recursion_limit="0200"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:764:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:765:5
    |
 LL |     #[recursion_limit="0200"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:744:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:745:1
    |
 LL | #[recursion_limit="0200"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:744:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:745:1
    |
 LL | #[recursion_limit="0200"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:773:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:774:17
    |
 LL |     mod inner { #![type_length_limit="0100"] }
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be in the root module
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:773:17
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:774:17
    |
 LL |     mod inner { #![type_length_limit="0100"] }
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:777:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:778:5
    |
 LL |     #[type_length_limit="0100"] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:777:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:778:5
    |
 LL |     #[type_length_limit="0100"] fn f() { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:781:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:782:5
    |
 LL |     #[type_length_limit="0100"] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:781:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:782:5
    |
 LL |     #[type_length_limit="0100"] struct S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:785:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:786:5
    |
 LL |     #[type_length_limit="0100"] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:785:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:786:5
    |
 LL |     #[type_length_limit="0100"] type T = S;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:789:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:790:5
    |
 LL |     #[type_length_limit="0100"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:789:5
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:790:5
    |
 LL |     #[type_length_limit="0100"] impl S { }
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:769:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:770:1
    |
 LL | #[type_length_limit="0100"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![foo]`
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:769:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:770:1
    |
 LL | #[type_length_limit="0100"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:44:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:45:1
    |
 LL | #![macro_export]
    | ^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:45:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:46:1
    |
 LL | #![plugin_registrar]
    | ^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:48:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:49:1
    |
 LL | #![main]
    | ^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:49:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:50:1
    |
 LL | #![start]
    | ^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:52:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:53:1
    |
 LL | #![repr()]
    | ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:54:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:55:1
    |
 LL | #![path = "3800"]
    | ^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:55:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:56:1
    |
 LL | #![automatically_derived]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:57:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:58:1
    |
 LL | #![no_link]
    | ^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:59:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:60:1
    |
 LL | #![should_panic]
    | ^^^^^^^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:60:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:61:1
    |
 LL | #![ignore]
    | ^^^^^^^^^^
 
 warning: unused attribute
-  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:66:1
+  --> $DIR/issue-43106-gating-of-builtin-attrs.rs:67:1
    |
 LL | #![proc_macro_derive()]
    | ^^^^^^^^^^^^^^^^^^^^^^^