CGen: undeclared variable

[SlashScreen]

Describe the bug

For an unknown reason, a defined local variable is marked as undefined by the c compiler.

Reproduction Steps

Unknown minimum reproduction. Running v run src on the project should cause the error, as it does so on windows and linux. The error seems around here.

Expected Behavior

The program compiles.

Current Behavior

==================
/tmp/v_1000/src.965835628491974123.tmp.c:15045: error: '_t19' undeclared
...
==================
(Use `v -cg` to print the entire error message)

builder error: 
==================
C error. This should never happen.

Possible Solution

No response

Additional Information/Context

The error appears here, I believe. the generated c code is as follows:

_result_main__Token _t19 = main__Parser_current(/*rec*/*p); // Defined here
    if (_t19.is_error) { // This is OK
        _result_usize _t20;
        memcpy(&_t20, &_t19, sizeof(_result));
        return _t20;
    }
    
         _t13 = _t16;
    } else if ( (*(main__Token*)_t19.data).tag != main__Symbol__l_bracket) { // _t19 here is "undeclared"
    } else {
        
        _t13 = (_option_usize){ .state=2, .err=_const_none__, .data={EMPTY_STRUCT_INITIALIZATION} };
    }

This is unexpected, as _t19 is declared above.

V version

V 0.4.2 25777bd

Environment details (OS name and version, etc.)

Ubuntu, Windows 11.

Note

You can vote for this issue using the 👍 reaction. More votes increase the issue's priority for developers.

Take into account that only the 👍 reaction counts as a vote.
Only reactions to the issue itself will be counted as votes, not comments.

[SlashScreen]

This appears to be a bug with how If statement chains are resolved. It's adding an extra }.

[felipensp]

Can you try again with the newer V version?

[SlashScreen]

@felipensp Yes, unfortunately.

[shove70]

Maybe it's related to this:
#19782

v run .          // no error.
v run src        // has error.

[SlashScreen]

@shove70 v test . yields same result.

[felipensp]

Possible workaround:

ret_type := match p.current()!.tag {
		.ident {
			?usize(p.consume_ident()!)
		}
		.l_bracket { // Compiler error
			return error('Expected type name as return type')
		}
		else {
			?usize(none)
		}
	}