Compiler panics on empty struct

[xTheFreeZe]

Describe the bug

This bug has likely been fixed by: 24403

When trying to compile this code:

pub struct Foo {
pub mut:
   
}

the compiler panics with the following message:

V panic: array.last: array is empty
v hash: 8cb0fc7
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:19671: at _v_panic: Backtrace
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:19250: by array_last
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:16838: by v__parser__Parser_struct_decl
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:12956: by v__parser__Parser_top_stmt
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:12588: by v__parser__Parser_parse
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:12551: by v__parser__parse_file
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:12652: by v__parser__parse_files
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:50366: by v__builder__Builder_parse_imports
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:50247: by v__builder__Builder_front_stages
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:50302: by v__builder__Builder_front_and_middle_stages
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:52833: by v__builder__cbuilder__gen_c
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:52805: by v__builder__cbuilder__build_c
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:52796: by v__builder__cbuilder__compile_c
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:52713: by v__builder__Builder_rebuild
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:51866: by v__builder__compile
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:53231: by main__rebuild
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:53186: by main__main
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:53934: by main

Interestingly enough, this code compiles:

pub struct Foo {
    
}

Reproduction Steps

To reproduce this bug, try to compile this code:

pub struct Foo {
pub mut:
    
}

Expected Behavior

The code either compiles or the compiler throws an error

Current Behavior

The compiler panics:

V panic: array.last: array is empty
v hash: 8cb0fc7
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:19671: at _v_panic: Backtrace
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:19250: by array_last
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:16838: by v__parser__Parser_struct_decl
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:12956: by v__parser__Parser_top_stmt
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:12588: by v__parser__Parser_parse
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:12551: by v__parser__parse_file
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:12652: by v__parser__parse_files
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:50366: by v__builder__Builder_parse_imports
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:50247: by v__builder__Builder_front_stages
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:50302: by v__builder__Builder_front_and_middle_stages
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:52833: by v__builder__cbuilder__gen_c
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:52805: by v__builder__cbuilder__build_c
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:52796: by v__builder__cbuilder__compile_c
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:52713: by v__builder__Builder_rebuild
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:51866: by v__builder__compile
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:53231: by main__rebuild
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:53186: by main__main
/tmp/v_1000/v2.01JTCZDYBXFHGHJ09J5ZEQ008B.tmp.c:53934: by main

Possible Solution

No response

Additional Information/Context

No response

V version

V version: V 0.4.10 8cb0fc7

Environment details (OS name and version, etc.)

|V full version      |V 0.4.10 1cb76c9.8cb0fc7
|:-------------------|:-------------------
|OS                  |linux, "Fedora Linux 42 (Workstation Edition)"
|Processor           |12 cpus, 64bit, little endian, AMD Ryzen 5 2600 Six-Core Processor
|Memory              |14.11GB/23.39GB
|                    |
|V executable        |/home/marwin/v/v
|V last modified time|2025-05-04 06:23:44
|                    |
|V home dir          |OK, value: /home/marwin/v
|VMODULES            |OK, value: /home/marwin/.vmodules
|VTMP                |OK, value: /tmp/v_1000
|Current working dir |OK, value: /home/marwin
|                    |
|Git version         |git version 2.49.0
|V git status        |weekly.2025.16-91-g8cb0fc7c
|.git/config present |true
|                    |
|cc version          |cc (GCC) 15.1.1 20250425 (Red Hat 15.1.1-1)
|gcc version         |gcc (GCC) 15.1.1 20250425 (Red Hat 15.1.1-1)
|clang version       |clang version 20.1.3 (Fedora 20.1.3-1.fc42)
|tcc version         |tcc version 0.9.28rc 2024-07-31 HEAD@1cee0908 (x86_64 Linux)
|tcc git status      |thirdparty-linux-amd64 0134e9b9
|emcc version        |N/A
|glibc version       |ldd (GNU libc) 2.41

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