add error message for c# style named arguments

[nouritsu]

Solves #116411
Result -

fn main() {
    let a = 50;

    foo(x: a);
}

fn foo(x: i32) {}

Output -

fn main() {
    let a = 50;

    Foo::bar(x: a);
}

struct Foo {
    pub fn bar(x : i32){}
}

Output -

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @petrochenkov (or someone else) soon.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

• @rustbot author: the review is finished, PR author should check the comments and take action accordingly
• @rustbot review: the author is ready for a review, this PR will be queued again in the reviewer's queue

[nouritsu]

Would I have to change the tests, since the error message is no longer the same? @estebank

[petrochenkov]

r? compiler
I'm overloaded with reviews.

[petrochenkov]

r? compiler
b-naber doesn't do reviews.

[estebank]

r? @estebank

@nouritsu you need to run ./x.py test tests/ui --bless in order to update the relevant .stderr files.

[nouritsu]

Running it does not seem to update any files. Am I missing something?

It hardly took any time and it did not change any files or output anything.

My bad, I am on nushell and not a bash terminal, forgot about the syntax.

[nouritsu]

This is the message from the command -

[rustbot]

There are merge commits (commits with multiple parents) in your changes. We have a no merge policy so these commits will need to be removed for this pull request to be merged.

You can start a rebase with the following commands:

$ # rebase
$ git rebase -i master
$ # delete any merge commits in the editor that appears
$ git push --force-with-lease

The following commits are merge commits:

• 23c8e88

[rust-log-analyzer]

The job x86_64-gnu-llvm-16 failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

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---

---- [ui] tests/ui/parser/issues/issue-111416.rs stdout ----
diff of stderr:

- error: invalid `struct` delimiters or `fn` call arguments
+ error: expected identifier, found `:`
+   --> $DIR/issue-111416.rs:2:30
3    |
3    |
4 LL |     let my = monad_bind(mx, T: Try);
+    |                              ^ expected identifier
6    |
6    |
- help: if `monad_bind` is a struct, use braces as delimiters
+ help: if this is a parameter, remove the name for the parameter
8    |
- LL |     let my = monad_bind { mx, T: Try };
-    |                         ~            ~
- help: if `monad_bind` is a function, use the arguments directly
-    |
13 LL -     let my = monad_bind(mx, T: Try);
14 LL +     let my = monad_bind(mx, Try);

16 
- error: aborting due to 1 previous error
- error: aborting due to 1 previous error
+ error: expected one of `)` or `,`, found `Try`
+    |
+    |
+ LL |     let my = monad_bind(mx, T: Try);
+    |                               -^^^ expected one of `)` or `,`
+    |                               help: missing `,`
18 
18 
+ error[E0425]: cannot find value `mx` in this scope
+    |
+    |
+ LL |     let my = monad_bind(mx, T: Try);
+ 
+ error[E0425]: cannot find value `Try` in this scope
+   --> $DIR/issue-111416.rs:2:32
+    |
+    |
+ LL |     let my = monad_bind(mx, T: Try);
+ 
+ 
+ error[E0425]: cannot find function `monad_bind` in this scope
+    |
+    |
+ LL |     let my = monad_bind(mx, T: Try);
+ 
+ error: aborting due to 5 previous errors
+ 
+ For more information about this error, try `rustc --explain E0425`.
---
To only update this specific test, also pass `--test-args parser/issues/issue-111416.rs`

error: 1 errors occurred comparing output.
status: exit status: 1
command: RUSTC_ICE="0" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/parser/issues/issue-111416.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "--sysroot" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/parser/issues/issue-111416" "-A" "unused" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/parser/issues/issue-111416/auxiliary"
--- stderr -------------------------------
error: expected identifier, found `:`
##[error]  --> /checkout/tests/ui/parser/issues/issue-111416.rs:2:30
   |
   |
LL |     let my = monad_bind(mx, T: Try); //~ ERROR invalid `struct` delimiters or `fn` call arguments
   |
help: if this is a parameter, remove the name for the parameter
   |
   |
LL -     let my = monad_bind(mx, T: Try); //~ ERROR invalid `struct` delimiters or `fn` call arguments
LL +     let my = monad_bind(mx, Try); //~ ERROR invalid `struct` delimiters or `fn` call arguments


error: expected one of `)` or `,`, found `Try`
   |
   |
LL |     let my = monad_bind(mx, T: Try); //~ ERROR invalid `struct` delimiters or `fn` call arguments
   |                               -^^^ expected one of `)` or `,`
   |                               help: missing `,`


error[E0425]: cannot find value `mx` in this scope
   |
   |
LL |     let my = monad_bind(mx, T: Try); //~ ERROR invalid `struct` delimiters or `fn` call arguments

error[E0425]: cannot find value `Try` in this scope
##[error]  --> /checkout/tests/ui/parser/issues/issue-111416.rs:2:32
   |
   |
LL |     let my = monad_bind(mx, T: Try); //~ ERROR invalid `struct` delimiters or `fn` call arguments


error[E0425]: cannot find function `monad_bind` in this scope
   |
   |
LL |     let my = monad_bind(mx, T: Try); //~ ERROR invalid `struct` delimiters or `fn` call arguments

error: aborting due to 5 previous errors

For more information about this error, try `rustc --explain E0425`.
For more information about this error, try `rustc --explain E0425`.
------------------------------------------


---- [ui] tests/ui/parser/issues/issue-34255-1.rs stdout ----
diff of stderr:

- error: invalid `struct` delimiters or `fn` call arguments
+ error: expected expression, found `:`
+   --> $DIR/issue-34255-1.rs:8:22
3    |
3    |
4 LL |     Test::Drill(field: 42);
+    |                      ^ expected expression
6    |
6    |
- help: if `Test::Drill` is a struct, use braces as delimiters
+ help: if this is a parameter, remove the name for the parameter
8    |
- LL |     Test::Drill { field: 42 };
-    |                 ~           ~
- help: if `Test::Drill` is a function, use the arguments directly
-    |
13 LL -     Test::Drill(field: 42);
14 LL +     Test::Drill(42);

16 
- error: aborting due to 1 previous error
Build completed unsuccessfully in 0:12:52
Build completed unsuccessfully in 0:12:52
+ error: expected one of `!`, `)`, `,`, `.`, `::`, `?`, `{`, or an operator, found `:`
+    |
+    |
+ LL |     Test::Drill(field: 42);
+    |                      |
+    |                      expected one of 8 possible tokens
+    |                      help: missing `,`
18 
18 
+ error: expected one of `)` or `,`, found `42`
+    |
+    |
+ LL |     Test::Drill(field: 42);
+    |                       -^^ expected one of `)` or `,`
+    |                       help: missing `,`
+ 
+ error[E0425]: cannot find value `field` in this scope
+   --> $DIR/issue-34255-1.rs:8:17
+   --> $DIR/issue-34255-1.rs:8:17
+    |
+ LL |     Test::Drill(field: 42);
+ 
+ 
+ error[E0533]: expected value, found struct variant `Test::Drill`
+    |
+    |
+ LL |     Test::Drill(field: 42);
+ 
+ error: aborting due to 5 previous errors
+ 
+ Some errors have detailed explanations: E0425, E0533.
---
To only update this specific test, also pass `--test-args parser/issues/issue-34255-1.rs`

error: 1 errors occurred comparing output.
status: exit status: 1
command: RUSTC_ICE="0" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/parser/issues/issue-34255-1.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "--sysroot" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/parser/issues/issue-34255-1" "-A" "unused" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/parser/issues/issue-34255-1/auxiliary"
--- stderr -------------------------------
error: expected expression, found `:`
##[error]  --> /checkout/tests/ui/parser/issues/issue-34255-1.rs:8:22
   |
   |
LL |     Test::Drill(field: 42);
   |
help: if this is a parameter, remove the name for the parameter
   |
   |
LL -     Test::Drill(field: 42);
LL +     Test::Drill(42);


error: expected one of `!`, `)`, `,`, `.`, `::`, `?`, `{`, or an operator, found `:`
   |
   |
LL |     Test::Drill(field: 42);
   |                      |
   |                      expected one of 8 possible tokens
   |                      help: missing `,`


error: expected one of `)` or `,`, found `42`
   |
   |
LL |     Test::Drill(field: 42);
   |                       -^^ expected one of `)` or `,`
   |                       help: missing `,`

error[E0425]: cannot find value `field` in this scope
##[error]  --> /checkout/tests/ui/parser/issues/issue-34255-1.rs:8:17
##[error]  --> /checkout/tests/ui/parser/issues/issue-34255-1.rs:8:17
   |
LL |     Test::Drill(field: 42);


error[E0533]: expected value, found struct variant `Test::Drill`
   |
   |
LL |     Test::Drill(field: 42);

error: aborting due to 5 previous errors

Some errors have detailed explanations: E0425, E0533.
Some errors have detailed explanations: E0425, E0533.
For more information about an error, try `rustc --explain E0425`.
------------------------------------------


---- [ui] tests/ui/parser/issues/issue-44406.rs stdout ----
diff of stderr:

- error: invalid `struct` delimiters or `fn` call arguments
+ error: expected expression, found `:`
+   --> $DIR/issue-44406.rs:3:16
3    |
3    |
4 LL |         bar(baz: $rest)
+    |                ^ expected expression
6 ...
6 ...
7 LL |     foo!(true);

9    |
10    = note: this error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)
10    = note: this error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)
- help: if `bar` is a struct, use braces as delimiters
+ help: if this is a parameter, remove the name for the parameter
12    |
- LL |         bar { baz: $rest }
- help: if `bar` is a function, use the arguments directly
-    |
-    |
17 LL -         bar(baz: $rest)
18 LL +         bar(: $rest)

20 
- error: aborting due to 1 previous error
- error: aborting due to 1 previous error
+ error: expected one of `!`, `)`, `,`, `.`, `::`, `?`, `{`, or an operator, found `:`
+    |
+    |
+ LL |         bar(baz: $rest)
+    |                |
+    |                expected one of 8 possible tokens
+    |                help: missing `,`
+ ...
+ ...
+ LL |     foo!(true);
+    |
+    = note: this error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)
22 
22 
+ error: expected one of `)` or `,`, found keyword `true`
+    |
+    |
+ LL |         bar(baz: $rest)
+    |                 - help: missing `,`
+ ...
+ LL |     foo!(true);
+    |          ^^^^ expected one of `)` or `,`
+ error[E0425]: cannot find value `baz` in this scope
+   --> $DIR/issue-44406.rs:3:13
+    |
+    |
+ LL |         bar(baz: $rest)
+ ...
+ ...
+ LL |     foo!(true);
+    |
+    = note: this error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)
+ 
+ error[E0425]: cannot find function `bar` in this scope
+ error[E0425]: cannot find function `bar` in this scope
+   --> $DIR/issue-44406.rs:3:9
+    |
+ LL |         bar(baz: $rest)
+ ...
+ ...
+ LL |     foo!(true);
+    |
+    = note: this error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)
+ 
+ error: aborting due to 5 previous errors
---
To only update this specific test, also pass `--test-args parser/issues/issue-44406.rs`

error: 1 errors occurred comparing output.
status: exit status: 1
command: RUSTC_ICE="0" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/parser/issues/issue-44406.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "--sysroot" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/parser/issues/issue-44406" "-A" "unused" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/parser/issues/issue-44406/auxiliary"
--- stderr -------------------------------
error: expected expression, found `:`
##[error]  --> /checkout/tests/ui/parser/issues/issue-44406.rs:3:16
   |
   |
LL |         bar(baz: $rest) //~ ERROR invalid `struct` delimiters or `fn` call arguments
...
...
LL |     foo!(true);
   |
   = note: this error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)
help: if this is a parameter, remove the name for the parameter
   |
   |
LL -         bar(baz: $rest) //~ ERROR invalid `struct` delimiters or `fn` call arguments
LL +         bar(: $rest) //~ ERROR invalid `struct` delimiters or `fn` call arguments


error: expected one of `!`, `)`, `,`, `.`, `::`, `?`, `{`, or an operator, found `:`
   |
   |
LL |         bar(baz: $rest) //~ ERROR invalid `struct` delimiters or `fn` call arguments
   |                |
   |                expected one of 8 possible tokens
   |                help: missing `,`
...
...
LL |     foo!(true);
   |
   = note: this error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)


error: expected one of `)` or `,`, found keyword `true`
   |
   |
LL |         bar(baz: $rest) //~ ERROR invalid `struct` delimiters or `fn` call arguments
   |                 - help: missing `,`
...
LL |     foo!(true);
   |          ^^^^ expected one of `)` or `,`
error[E0425]: cannot find value `baz` in this scope
##[error]  --> /checkout/tests/ui/parser/issues/issue-44406.rs:3:13
   |
   |
LL |         bar(baz: $rest) //~ ERROR invalid `struct` delimiters or `fn` call arguments
...
...
LL |     foo!(true);
   |
   = note: this error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find function `bar` in this scope
error[E0425]: cannot find function `bar` in this scope
##[error]  --> /checkout/tests/ui/parser/issues/issue-44406.rs:3:9
   |
LL |         bar(baz: $rest) //~ ERROR invalid `struct` delimiters or `fn` call arguments
...
...
LL |     foo!(true);
   |
   = note: this error originates in the macro `foo` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 5 previous errors
---
-   --> $DIR/issue-91461.rs:2:7
+ error: expected expression, found `:`
+   --> $DIR/issue-91461.rs:2:8
3    |
4 LL |     a(_:b:,)
+    |        ^ expected expression
+    |
+ help: if this is a parameter, remove the name for the parameter
+    |
+    |
+ LL -     a(_:b:,)
+ LL +     a(b:,)
6 
6 
7 error: expected one of `)`, `,`, `.`, `?`, or an operator, found `:`

9    |
9    |
10 LL |     a(_:b:,)
-    |        ^ expected one of `)`, `,`, `.`, `?`, or an operator
+    |        |
+    |        |
+    |        expected one of `)`, `,`, `.`, `?`, or an operator
+    |        help: missing `,`
- error: aborting due to 2 previous errors
- error: aborting due to 2 previous errors
+ error: expected one of `)` or `,`, found `b`
+    |
+    |
+ LL |     a(_:b:,)
+    |         |
+    |         |
+    |         expected one of `)` or `,`
+    |         help: missing `,`
+ error: expected expression, found `:`
+   --> $DIR/issue-91461.rs:2:10
+    |
+    |
+ LL |     a(_:b:,)
+    |
+ help: if this is a parameter, remove the name for the parameter
+    |
+    |
+ LL -     a(_:b:,)
+ LL +     a(_:,)
+ 
+ 
+ error: expected one of `!`, `)`, `,`, `.`, `::`, `?`, `{`, or an operator, found `:`
+    |
+    |
+ LL |     a(_:b:,)
+    |          |
+    |          expected one of 8 possible tokens
+    |          help: missing `,`
+ 
+ 
+ error[E0425]: cannot find value `b` in this scope
+   --> $DIR/issue-91461.rs:2:9
+    |
+ LL |     a(_:b:,)
+ 
+ 
+ error: in expressions, `_` can only be used on the left-hand side of an assignment
+    |
+    |
+ LL |     a(_:b:,)
+    |       ^ `_` not allowed here
+ error[E0425]: cannot find function `a` in this scope
+   --> $DIR/issue-91461.rs:2:5
+    |
+    |
+ LL |     a(_:b:,)
+ 
+ error: aborting due to 8 previous errors
+ 
+ For more information about this error, try `rustc --explain E0425`.
---
To only update this specific test, also pass `--test-args parser/issues/issue-91461.rs`

error: 1 errors occurred comparing output.
status: exit status: 1
command: RUSTC_ICE="0" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/parser/issues/issue-91461.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "--sysroot" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/parser/issues/issue-91461" "-A" "unused" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/parser/issues/issue-91461/auxiliary"
--- stderr -------------------------------
error: expected expression, found `:`
##[error]  --> /checkout/tests/ui/parser/issues/issue-91461.rs:2:8
   |
   |
LL |     a(_:b:,)
   |
help: if this is a parameter, remove the name for the parameter
   |
   |
LL -     a(_:b:,)
LL +     a(b:,)


error: expected one of `)`, `,`, `.`, `?`, or an operator, found `:`
   |
   |
LL |     a(_:b:,)
   |        |
   |        |
   |        expected one of `)`, `,`, `.`, `?`, or an operator
   |        help: missing `,`

error: expected one of `)` or `,`, found `b`
   |
   |
LL |     a(_:b:,)
   |         |
   |         |
   |         expected one of `)` or `,`
   |         help: missing `,`
error: expected expression, found `:`
##[error]  --> /checkout/tests/ui/parser/issues/issue-91461.rs:2:10
   |
   |
LL |     a(_:b:,)
   |
help: if this is a parameter, remove the name for the parameter
   |
   |
LL -     a(_:b:,)
LL +     a(_:,)


error: expected one of `!`, `)`, `,`, `.`, `::`, `?`, `{`, or an operator, found `:`
   |
   |
LL |     a(_:b:,)
   |          |
   |          expected one of 8 possible tokens
   |          help: missing `,`


error[E0425]: cannot find value `b` in this scope
##[error]  --> /checkout/tests/ui/parser/issues/issue-91461.rs:2:9
   |
LL |     a(_:b:,)


error: in expressions, `_` can only be used on the left-hand side of an assignment
   |
   |
LL |     a(_:b:,)
   |       ^ `_` not allowed here
error[E0425]: cannot find function `a` in this scope
##[error]  --> /checkout/tests/ui/parser/issues/issue-91461.rs:2:5
   |
   |
LL |     a(_:b:,)

error: aborting due to 8 previous errors

For more information about this error, try `rustc --explain E0425`.
For more information about this error, try `rustc --explain E0425`.
------------------------------------------


---- [ui] tests/ui/parser/recover/recover-from-bad-variant.rs stdout ----
diff of stderr:

- error: invalid `struct` delimiters or `fn` call arguments
+ error: expected expression, found `:`
+   --> $DIR/recover-from-bad-variant.rs:7:24
3    |
3    |
4 LL |     let x = Enum::Foo(a: 3, b: 4);
+    |                        ^ expected expression
6    |
- help: if `Enum::Foo` is a struct, use braces as delimiters
+ help: if this is a parameter, remove the name for the parameter
+ help: if this is a parameter, remove the name for the parameter
8    |
- LL |     let x = Enum::Foo { a: 3, b: 4 };
- help: if `Enum::Foo` is a function, use the arguments directly
- help: if `Enum::Foo` is a function, use the arguments directly
+ LL -     let x = Enum::Foo(a: 3, b: 4);
+ LL +     let x = Enum::Foo(3, b: 4);
+ 
+ 
+ error: expected one of `!`, `)`, `,`, `.`, `::`, `?`, `{`, or an operator, found `:`
+    |
+    |
+ LL |     let x = Enum::Foo(a: 3, b: 4);
+    |                        |
+    |                        expected one of 8 possible tokens
+    |                        help: missing `,`
+ 
+ 
+ error: expected one of `)` or `,`, found `3`
+    |
+    |
+ LL |     let x = Enum::Foo(a: 3, b: 4);
+    |                         -^ expected one of `)` or `,`
+    |                         help: missing `,`
+ 
+ error: expected expression, found `:`
+   --> $DIR/recover-from-bad-variant.rs:7:30
+   --> $DIR/recover-from-bad-variant.rs:7:30
+    |
+ LL |     let x = Enum::Foo(a: 3, b: 4);
+    |
+ help: if this is a parameter, remove the name for the parameter
+    |
+    |
13 LL -     let x = Enum::Foo(a: 3, b: 4);
- LL +     let x = Enum::Foo(3, 4);
+ LL +     let x = Enum::Foo(a: 3, 4);
16 
16 
+ error: expected one of `!`, `)`, `,`, `.`, `::`, `?`, `{`, or an operator, found `:`
+    |
+    |
+ LL |     let x = Enum::Foo(a: 3, b: 4);
+    |                              |
+    |                              expected one of 8 possible tokens
+    |                              help: missing `,`
+ 
+ 
+ error: expected one of `)` or `,`, found `4`
+    |
+    |
+ LL |     let x = Enum::Foo(a: 3, b: 4);
+    |                               -^ expected one of `)` or `,`
+    |                               help: missing `,`
+ 
+ error[E0425]: cannot find value `a` in this scope
+   --> $DIR/recover-from-bad-variant.rs:7:23
+   --> $DIR/recover-from-bad-variant.rs:7:23
+    |
+ LL |     let x = Enum::Foo(a: 3, b: 4);
+ 
+ error[E0425]: cannot find value `b` in this scope
+   --> $DIR/recover-from-bad-variant.rs:7:29
+    |
+    |
+ LL |     let x = Enum::Foo(a: 3, b: 4);
+ 
+ error[E0533]: expected value, found struct variant `Enum::Foo`
+   --> $DIR/recover-from-bad-variant.rs:7:13
+    |
+    |
+ LL |     let x = Enum::Foo(a: 3, b: 4);
+ 
17 error[E0164]: expected tuple struct or tuple variant, found struct variant `Enum::Foo`
18   --> $DIR/recover-from-bad-variant.rs:10:9
19    |
19    |

31 LL |         Enum::Bar(a, b) => {}
33 
- error: aborting due to 3 previous errors
+ error: aborting due to 11 previous errors
35 
---
--- stderr -------------------------------
error: expected expression, found `:`
##[error]  --> /checkout/tests/ui/parser/recover/recover-from-bad-variant.rs:7:24
   |
LL |     let x = Enum::Foo(a: 3, b: 4);
   |
help: if this is a parameter, remove the name for the parameter
   |
   |
LL -     let x = Enum::Foo(a: 3, b: 4);
LL +     let x = Enum::Foo(3, b: 4);


error: expected one of `!`, `)`, `,`, `.`, `::`, `?`, `{`, or an operator, found `:`
   |
   |
LL |     let x = Enum::Foo(a: 3, b: 4);
   |                        |
   |                        expected one of 8 possible tokens
   |                        help: missing `,`


error: expected one of `)` or `,`, found `3`
   |
   |
LL |     let x = Enum::Foo(a: 3, b: 4);
   |                         -^ expected one of `)` or `,`
   |                         help: missing `,`

error: expected expression, found `:`
##[error]  --> /checkout/tests/ui/parser/recover/recover-from-bad-variant.rs:7:30
##[error]  --> /checkout/tests/ui/parser/recover/recover-from-bad-variant.rs:7:30
   |
LL |     let x = Enum::Foo(a: 3, b: 4);
   |
help: if this is a parameter, remove the name for the parameter
   |
   |
LL -     let x = Enum::Foo(a: 3, b: 4);
LL +     let x = Enum::Foo(a: 3, 4);


error: expected one of `!`, `)`, `,`, `.`, `::`, `?`, `{`, or an operator, found `:`
   |
   |
LL |     let x = Enum::Foo(a: 3, b: 4);
   |                              |
   |                              expected one of 8 possible tokens
   |                              help: missing `,`


error: expected one of `)` or `,`, found `4`
   |
   |
LL |     let x = Enum::Foo(a: 3, b: 4);
   |                               -^ expected one of `)` or `,`
   |                               help: missing `,`

error[E0425]: cannot find value `a` in this scope
##[error]  --> /checkout/tests/ui/parser/recover/recover-from-bad-variant.rs:7:23
##[error]  --> /checkout/tests/ui/parser/recover/recover-from-bad-variant.rs:7:23
   |
LL |     let x = Enum::Foo(a: 3, b: 4);

error[E0425]: cannot find value `b` in this scope
##[error]  --> /checkout/tests/ui/parser/recover/recover-from-bad-variant.rs:7:29
   |
   |
LL |     let x = Enum::Foo(a: 3, b: 4);

error[E0533]: expected value, found struct variant `Enum::Foo`
##[error]  --> /checkout/tests/ui/parser/recover/recover-from-bad-variant.rs:7:13
   |
   |
LL |     let x = Enum::Foo(a: 3, b: 4);

error[E0164]: expected tuple struct or tuple variant, found struct variant `Enum::Foo`
##[error]  --> /checkout/tests/ui/parser/recover/recover-from-bad-variant.rs:10:9
   |
   |
LL |         Enum::Foo(a, b) => {}
   |         ^^^^^^^^^^^^^^^ not a tuple struct or tuple variant

error[E0769]: tuple variant `Enum::Bar` written as struct variant
   |
   |
LL |         Enum::Bar { a, b } => {}
   |
help: use the tuple variant pattern syntax instead
   |
   |
LL |         Enum::Bar(a, b) => {}

error: aborting due to 11 previous errors

Some errors have detailed explanations: E0164, E0425, E0533, E0769.
---
---- [ui] tests/ui/type/type-ascription-precedence.rs stdout ----
diff of stderr:

9    |
10 LL |     *(S: Z);
+    |
+ help: if this is a parameter, remove the name for the parameter
+    |
+    |
+ LL -     *(S: Z);
+ LL +     *(Z);
12 
12 
+ error: expected one of `)` or `,`, found `Z`
+    |
+    |
+ LL |     *(S: Z);
+    |         -^ expected one of `)` or `,`
+    |         help: missing `,`
+ 
13 error: expected identifier, found `:`
14   --> $DIR/type-ascription-precedence.rs:37:8
14   --> $DIR/type-ascription-precedence.rs:37:8
15    |

16 LL |     -(S: Z);
+    |
+ help: if this is a parameter, remove the name for the parameter
+    |
+    |
+ LL -     -(S: Z);
+ LL +     -(Z);
18 
18 
+ error: expected one of `)` or `,`, found `Z`
+    |
+    |
+ LL |     -(S: Z);
+    |         -^ expected one of `)` or `,`
+    |         help: missing `,`
+ 
19 error: expected one of `.`, `;`, `?`, `}`, or an operator, found `:`
20   --> $DIR/type-ascription-precedence.rs:41:12
20   --> $DIR/type-ascription-precedence.rs:41:12
21    |

42 LL |     (S .. S): S;
43    |             ^ expected one of `.`, `;`, `?`, `}`, or an operator
- error: aborting due to 7 previous errors
+ error: aborting due to 9 previous errors
46 
47 
---
--- stderr -------------------------------
error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, `}`, or an operator, found `:`
##[error]  --> /checkout/tests/ui/type/type-ascription-precedence.rs:27:7
   |
LL |     &S: &S; //~ ERROR expected one of

error: expected identifier, found `:`
##[error]  --> /checkout/tests/ui/type/type-ascription-precedence.rs:33:8
   |
   |
LL |     *(S: Z); //~ ERROR expected identifier
   |
help: if this is a parameter, remove the name for the parameter
   |
   |
LL -     *(S: Z); //~ ERROR expected identifier
LL +     *(Z); //~ ERROR expected identifier


error: expected one of `)` or `,`, found `Z`
   |
   |
LL |     *(S: Z); //~ ERROR expected identifier
   |         -^ expected one of `)` or `,`
   |         help: missing `,`

error: expected identifier, found `:`
##[error]  --> /checkout/tests/ui/type/type-ascription-precedence.rs:37:8
##[error]  --> /checkout/tests/ui/type/type-ascription-precedence.rs:37:8
   |
LL |     -(S: Z); //~ ERROR expected identifier
   |
help: if this is a parameter, remove the name for the parameter
   |
   |
LL -     -(S: Z); //~ ERROR expected identifier
LL +     -(Z); //~ ERROR expected identifier


error: expected one of `)` or `,`, found `Z`
   |
   |
LL |     -(S: Z); //~ ERROR expected identifier
   |         -^ expected one of `)` or `,`
   |         help: missing `,`

error: expected one of `.`, `;`, `?`, `}`, or an operator, found `:`
##[error]  --> /checkout/tests/ui/type/type-ascription-precedence.rs:41:12
##[error]  --> /checkout/tests/ui/type/type-ascription-precedence.rs:41:12
   |
LL |     (S + Z): Z; //~ ERROR expected one of
   |            ^ expected one of `.`, `;`, `?`, `}`, or an operator
error: expected one of `.`, `;`, `?`, `}`, or an operator, found `:`
##[error]  --> /checkout/tests/ui/type/type-ascription-precedence.rs:45:12
   |
   |
LL |     (S * Z): Z; //~ ERROR expected one of
   |            ^ expected one of `.`, `;`, `?`, `}`, or an operator
error: expected identifier, found `:`
##[error]  --> /checkout/tests/ui/type/type-ascription-precedence.rs:49:11
   |
   |
LL |     S .. S: S; //~ ERROR expected identifier, found `:`
   |
   = note: type ascription syntax has been removed, see issue #101728 <https://github.com/rust-lang/rust/issues/101728>

error: expected one of `.`, `;`, `?`, `}`, or an operator, found `:`
error: expected one of `.`, `;`, `?`, `}`, or an operator, found `:`
##[error]  --> /checkout/tests/ui/type/type-ascription-precedence.rs:53:13
   |
LL |     (S .. S): S; //~ ERROR expected one of
   |             ^ expected one of `.`, `;`, `?`, `}`, or an operator
error: aborting due to 9 previous errors
------------------------------------------

[estebank]

@nouritsu That output seems odd. Can you try to follow the instructions at https://rustc-dev-guide.rust-lang.org/tests/running.html? I wonder if there's some uncommon set-up in your environment for that error to happen. (raises fist at OSError not printing the path that caused the problem)

Also, we don't include merge commits in PRs, we always rebase on top of a newer master.

[nouritsu]

I'm not familiar with git, I will be opening a new pull request.