V compiler fails to pass struct method to C

[veranovus]

Describe the bug

V compiler fails to pass struct method to C.

Reproduction Steps

1. Import a function from C
2. Create an interface
3. Create a struct that implements said interface
4. Create a function that takes generic type but no arguments
5. Use that function to create she Struct and pass its method to a function that is imported from C

Small sample that reproduces the bug: https://github.com/veranovus/v-bug-report

Expected Behavior

I was expecting struct's method to be passed to the C function.

Current Behavior

================== C compilation error (from cc): ==============
cc: /tmp/v_501/bug_report.01J47TN359BPQMPFN4DM6KCKSM.tmp.c:12864:12: error: use of undeclared identifier 'main__Module_import_'; did you mean 'main__TestModule_import_'?
cc:         test_func(main__Module_import_, ((char*)(_SLIT("TestModule").str)));
cc:                   ^~~~~~~~~~~~~~~~~~~~
cc:                   main__TestModule_import_
cc: /tmp/v_501/bug_report.01J47TN359BPQMPFN4DM6KCKSM.tmp.c:12854:22: note: 'main__TestModule_import_' declared here
cc: VV_LOCAL_SYMBOL void main__TestModule_import_(main__TestModule mod) {
cc:                      ^
cc: 1 error generated.
================================================================
(You can pass `-cg`, or `-show-c-output` as well, to print all the C error messages).
builder error:
==================
C error found. It should never happen, when compiling pure V code.
This is a V compiler bug, please report it using `v bug file.v`,
or goto https://github.com/vlang/v/issues/new/choose .
You can also use #help on Discord: https://discord.gg/vlang .

Possible Solution

No idea, fix compiler ^^

Additional Information/Context

No response

V version

V 0.4.7 a4b8768

Environment details (OS name and version, etc.)

V full version: V 0.4.7 d43f0e4.a4b8768
OS: macos, macOS, 14.3.1, 23D60
Processor: 8 cpus, 64bit, little endian, Apple M1

getwd: /Users/vera/Documents/V/bug_report
vexe: /Users/vera/Documents/V/v/v
vexe mtime: 2024-08-01 20:39:11

vroot: OK, value: /Users/vera/Documents/V/v
VMODULES: OK, value: /Users/vera/.vmodules
VTMP: OK, value: /tmp/v_501

Git version: git version 2.39.3 (Apple Git-145)
Git vroot status: weekly.2024.31-25-ga4b87681
.git/config present: true

CC version: Apple clang version 15.0.0 (clang-1500.1.0.2.5)
thirdparty/tcc status: thirdparty-macos-arm64 713692d4

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