adapt rustdoc to infailable lexer

1 files changed, 154 insertions, 14 deletions

diff --git a/src/test/rustdoc-ui/invalid-syntax.stderr b/src/test/rustdoc-ui/invalid-syntax.stderr
index b4ed747b44c..3bebbecb9df 100644
--- a/src/test/rustdoc-ui/invalid-syntax.stderr
+++ b/src/test/rustdoc-ui/invalid-syntax.stderr
@@ -1,3 +1,21 @@
+error: unknown start of token: \
+ --> <doctest>:1:1
+  |
+1 | \__________pkt->size___________/          \_result->size_/ \__pkt->size__/
+  | ^
+
+error: unknown start of token: \
+ --> <doctest>:1:43
+  |
+1 | \__________pkt->size___________/          \_result->size_/ \__pkt->size__/
+  |                                           ^
+
+error: unknown start of token: \
+ --> <doctest>:1:60
+  |
+1 | \__________pkt->size___________/          \_result->size_/ \__pkt->size__/
+  |                                                            ^
+
 warning: could not parse code block as Rust code
   --> $DIR/invalid-syntax.rs:3:5
    |
@@ -6,13 +24,31 @@ LL |   /// ```
 LL | | /// \__________pkt->size___________/          \_result->size_/ \__pkt->size__/
 LL | | /// ```
    | |_______^
-   |
-   = note: error from rustc: unknown start of token: \
 help: mark blocks that do not contain Rust code as text
    |
 LL | /// ```text
    |     ^^^^^^^
 
+error: unknown start of token: `
+ --> <doctest>:3:30
+  |
+3 |    |     ^^^^^^ did you mean `baz::foobar`?
+  |                              ^
+help: Unicode character '`' (Grave Accent) looks like ''' (Single Quote), but it is not
+  |
+3 |    |     ^^^^^^ did you mean 'baz::foobar`?
+  |                              ^
+
+error: unknown start of token: `
+ --> <doctest>:3:42
+  |
+3 |    |     ^^^^^^ did you mean `baz::foobar`?
+  |                                          ^
+help: Unicode character '`' (Grave Accent) looks like ''' (Single Quote), but it is not
+  |
+3 |    |     ^^^^^^ did you mean `baz::foobar'?
+  |                                          ^
+
 warning: could not parse code block as Rust code
   --> $DIR/invalid-syntax.rs:8:5
    |
@@ -23,13 +59,17 @@ LL | | /// LL | use foobar::Baz;
 LL | | ///    |     ^^^^^^ did you mean `baz::foobar`?
 LL | | /// ```
    | |_______^
-   |
-   = note: error from rustc: unknown start of token: `
 help: mark blocks that do not contain Rust code as text
    |
 LL | /// ```text
    |     ^^^^^^^
 
+error: unknown start of token: \
+ --> <doctest>:1:1
+  |
+1 | \_
+  | ^
+
 warning: could not parse code block as Rust code
   --> $DIR/invalid-syntax.rs:19:5
    |
@@ -38,13 +78,17 @@ LL |   /// ```
 LL | | /// \_
 LL | | /// ```
    | |_______^
-   |
-   = note: error from rustc: unknown start of token: \
 help: mark blocks that do not contain Rust code as text
    |
 LL | /// ```text
    |     ^^^^^^^
 
+error: unknown start of token: \
+ --> <doctest>:1:1
+  |
+1 | \_
+  | ^
+
 warning: could not parse code block as Rust code
   --> $DIR/invalid-syntax.rs:32:5
    |
@@ -53,8 +97,12 @@ LL |   /// ```rust
 LL | | /// \_
 LL | | /// ```
    | |_______^
-   |
-   = note: error from rustc: unknown start of token: \
+
+error: unknown start of token: \
+ --> <doctest>:2:5
+  |
+2 |     \_
+  |     ^
 
 warning: could not parse code block as Rust code
   --> $DIR/invalid-syntax.rs:41:9
@@ -63,16 +111,48 @@ LL |   ///     code with bad syntax
    |  _________^
 LL | | ///     \_
    | |__________^
-   |
-   = note: error from rustc: unknown start of token: \
+
+error: unknown start of token: `
+ --> <doctest>:1:1
+  |
+1 | ```
+  | ^
+help: Unicode character '`' (Grave Accent) looks like ''' (Single Quote), but it is not
+  |
+1 | '``
+  | ^
+
+error: unknown start of token: `
+ --> <doctest>:1:2
+  |
+1 | ```
+  |  ^
+help: Unicode character '`' (Grave Accent) looks like ''' (Single Quote), but it is not
+  |
+1 | `'`
+  |  ^
+
+error: unknown start of token: `
+ --> <doctest>:1:3
+  |
+1 | ```
+  |   ^
+help: Unicode character '`' (Grave Accent) looks like ''' (Single Quote), but it is not
+  |
+1 | ``'
+  |   ^
 
 warning: could not parse code block as Rust code
   --> $DIR/invalid-syntax.rs:55:9
    |
 LL | ///     ```
    |         ^^^
-   |
-   = note: error from rustc: unknown start of token: `
+
+error: unknown start of token: \
+ --> <doctest>:1:1
+  |
+1 | \_
+  | ^
 
 warning: could not parse code block as Rust code
   --> $DIR/invalid-syntax.rs:58:5
@@ -82,8 +162,12 @@ LL |   /// ```edition2018
 LL | | /// \_
 LL | | /// ```
    | |_______^
-   |
-   = note: error from rustc: unknown start of token: \
+
+error: unknown start of token: \
+ --> <doctest>:1:1
+  |
+1 | \_
+  | ^
 
 warning: doc comment contains an invalid Rust code block
   --> $DIR/invalid-syntax.rs:63:1
@@ -95,3 +179,59 @@ LL | | #[doc = "```"]
    |
    = help: mark blocks that do not contain Rust code as text: ```text
 
+error: unknown start of token: \
+ --> <rustdoc-highlighting>:1:1
+  |
+1 | \_
+  | ^
+
+error: unknown start of token: \
+ --> <rustdoc-highlighting>:1:1
+  |
+1 | \_
+  | ^
+
+error: unknown start of token: `
+ --> <rustdoc-highlighting>:1:1
+  |
+1 | ```
+  | ^
+help: Unicode character '`' (Grave Accent) looks like ''' (Single Quote), but it is not
+  |
+1 | '``
+  | ^
+
+error: unknown start of token: \
+ --> <rustdoc-highlighting>:2:1
+  |
+2 | \_
+  | ^
+
+error: unknown start of token: \
+ --> <rustdoc-highlighting>:1:1
+  |
+1 | \_
+  | ^
+
+error: unknown start of token: \
+ --> <rustdoc-highlighting>:1:1
+  |
+1 | \_
+  | ^
+
+error: unknown start of token: `
+ --> <rustdoc-highlighting>:3:30
+  |
+3 |    |     ^^^^^^ did you mean `baz::foobar`?
+  |                              ^
+help: Unicode character '`' (Grave Accent) looks like ''' (Single Quote), but it is not
+  |
+3 |    |     ^^^^^^ did you mean 'baz::foobar`?
+  |                              ^
+
+error: unknown start of token: \
+ --> <rustdoc-highlighting>:1:1
+  |
+1 | \__________pkt->size___________/          \_result->size_/ \__pkt->size__/
+  | ^
+