Location Info error for "associated type bindings"

Start with gcc/testsuite/rust/compile/type-bindings1.rs and reproduce the diagnostic using gcc/crab1 with -frust-incomplete-and-experimental-compiler-do-not-use. Compare the caret ranges and messages with the rustc-1.49 output shown in the issue, then update the compiler diagnostics so the test reports the expected location information and passes.

Location Info error

• You can see similiar output on compiler-explorer
• Solving this issue helps this PR https://github.com/Rust-GCC/gccrs/pull/2367 to emit error code similiar to rustc.

I tried this code:

struct Foo<A, B>(A, B);

fn main() {
    let a;
    a = Foo::<A = i32, B = f32>(123f32);
    // { dg-error ErrorCode("E0229") "associated type bindings are not allowed here" "" { target *-*-* } .-1 }
    // { dg-error {Failed to resolve expression of function call} "" { target *-*-* } .-2 }
}

This happened:

• Location info was not clear.

mahad@linux:~/Desktop/mahad/gccrs-build$ gcc/crab1 /home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/type-bindings1.rs -frust-incomplete-and-experimental-compiler-do-not-use
/home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/type-bindings1.rs:5:15: error: associated type bindings are not allowed here [E0229]
    5 |     a = Foo::<A = i32, B = f32>(123f32);
-     |               ^^^^^^^ associated type not allowed here
+     |               ^        ~
/home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/type-bindings1.rs:5:9: error: Failed to resolve expression of function call
    5 |     a = Foo::<A = i32, B = f32>(123f32);
-     |         ^^^^^^^^^^^^^^^^^^^^^^^ ------ supplied 1 argument
-     |         |
-     |         expected 2 arguments
+     |         ^~~

I expected to see this happen:

• Location info similiar to rustc-1.49.
• This is the output of rust-1.49:

mahad@linux:~/Desktop/mahad/gccrs-build$ rustc /home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/type-bindings1.rs
error[E0229]: associated type bindings are not allowed here
 --> /home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/type-bindings1.rs:5:15
  |
5 |     a = Foo::<A = i32, B = f32>(123f32);
  |               ^^^^^^^ associated type not allowed here

error[E0061]: this function takes 2 arguments but 1 argument was supplied
 --> /home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/type-bindings1.rs:5:9
  |
5 |     a = Foo::<A = i32, B = f32>(123f32);
  |         ^^^^^^^^^^^^^^^^^^^^^^^ ------ supplied 1 argument
  |         |
  |         expected 2 arguments
  |
note: tuple struct defined here
 --> /home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/type-bindings1.rs:1:1
  |
1 | struct Foo<A, B>(A, B);
  | ^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0061, E0229.
For more information about an error, try `rustc --explain E0061`.

Meta

• What version of Rust GCC were you using, git sha 8628813ff9770a08fb6ac89a6f501b5138acc79b.