1 files changed, 60 insertions, 0 deletions
diff --git a/src/test/ui/cfg-attr-syntax-validation.stderr b/src/test/ui/cfg-attr-syntax-validation.stderr
new file mode 100644
index 00000000000..7773fdb8cf9
--- /dev/null
+++ b/src/test/ui/cfg-attr-syntax-validation.stderr
@@ -0,0 +1,60 @@
+error: `cfg` is not followed by parentheses
+  --> $DIR/cfg-attr-syntax-validation.rs:1:1
+   |
+LL | #[cfg] //~ ERROR `cfg` is not followed by parentheses
+   | ^^^^^^ help: expected syntax is: `cfg(/* predicate */)`
+
+error: `cfg` is not followed by parentheses
+  --> $DIR/cfg-attr-syntax-validation.rs:4:1
+   |
+LL | #[cfg = 10] //~ ERROR `cfg` is not followed by parentheses
+   | ^^^^^^^^^^^ help: expected syntax is: `cfg(/* predicate */)`
+
+error: `cfg` predicate is not specified
+  --> $DIR/cfg-attr-syntax-validation.rs:7:1
+   |
+LL | #[cfg()] //~ ERROR `cfg` predicate is not specified
+   | ^^^^^^^^
+
+error: multiple `cfg` predicates are specified
+  --> $DIR/cfg-attr-syntax-validation.rs:10:10
+   |
+LL | #[cfg(a, b)] //~ ERROR multiple `cfg` predicates are specified
+   |          ^
+
+error: `cfg` predicate key cannot be a literal
+  --> $DIR/cfg-attr-syntax-validation.rs:13:7
+   |
+LL | #[cfg("str")] //~ ERROR `cfg` predicate key cannot be a literal
+   |       ^^^^^
+
+error: `cfg` predicate key must be an identifier
+  --> $DIR/cfg-attr-syntax-validation.rs:16:7
+   |
+LL | #[cfg(a::b)] //~ ERROR `cfg` predicate key must be an identifier
+   |       ^^^^
+
+error[E0537]: invalid predicate `a`
+  --> $DIR/cfg-attr-syntax-validation.rs:19:7
+   |
+LL | #[cfg(a())] //~ ERROR invalid predicate `a`
+   |       ^^^
+
+error: literal in `cfg` predicate value must be a string
+  --> $DIR/cfg-attr-syntax-validation.rs:22:11
+   |
+LL | #[cfg(a = 10)] //~ ERROR literal in `cfg` predicate value must be a string
+   |           ^^
+
+error: `cfg` is not a well-formed meta-item
+  --> $DIR/cfg-attr-syntax-validation.rs:27:9
+   |
+LL |         #[cfg(feature = $expr)] //~ ERROR `cfg` is not a well-formed meta-item
+   |         ^^^^^^^^^^^^^^^^^^^^^^^ help: expected syntax is: `#[cfg(/* predicate */)]`
+...
+LL | generate_s9!(concat!("nonexistent"));
+   | ------------------------------------- in this macro invocation
+
+error: aborting due to 9 previous errors
+
+For more information about this error, try `rustc --explain E0537`.