Invalid Error Code for E0423

Wrong Error Code for E0423

• Fixing this issue help this https://github.com/Rust-GCC/gccrs/pull/2432 to emit error code similiar to rustc.

I tried this code from E0423:

// https://doc.rust-lang.org/error_codes/E0423.html
#![allow(unused)]
fn main() {
pub mod a {
    pub const I: i32 = 1;
}

fn h1() -> i32 {
    a.I
    //~^ ERROR expected value, found module `a`
    // did you mean `a::I`?
}
}

I expected to see this happen:

• Give error code similiar to rustc i.e.,

error[E0423]: expected value, found module `a`

Instead, this happened:

• It gives different error code. E0425

➜  gccrs-build gcc/crab1 ../mahad-testsuite/E0423.rs                                               
../mahad-testsuite/E0423.rs:8:5: error: cannot find value ‘a’ in this scope [E0425]
    8 |     a.I
      |     ^

Analyzing compilation unit

Time variable                                   usr           sys          wall           GGC
 TOTAL                              :   0.00          0.00          0.00          146k
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --enable-checking=release to disable checks.

Meta

• What version of Rust GCC were you using, git sha 866512cbc09bc883ef844b2b6cb70a72335756a7
• gccrs (Compiler-Explorer-Build-gcc-a06cec181de6398231e0662c1ed83d905ad6d1d9-binutils-2.40) 13.0.1 20230417 (experimental)

Start by reproducing the supplied E0423.rs example with the referenced gccrs revision and compare its diagnostic with rustc's E0423 output. Trace the compiler's name-resolution and error-code selection for a.I; done means this case reports E0423 rather than E0425, with the expected diagnostic wording.