build-lib with emit-h is crashing for particular input file

[arkadiuszwojcik]

Zig Version

0.13.0

Steps to Reproduce and Observed Behavior

I have simple test.zig file and would like to export (emit H file) following function:

const std = @import("std");

export fn memset(dest: [*]u8, ch: c_int, count: usize) [*]u8 {
    @memset(dest[0..count], @intCast(ch));
    return dest;
}

I am using following command:
zig build-lib -ODebug -Mroot=D:\test\test.zig -femit-h

The process is crashing? (console output is strange) and doesn't emit H file. No error is displayed. I am using Windows machine.

When I try same command but without -femit-h then everyting is working (zig lib is generated):
zig build-lib -ODebug -Mroot=D:\test\test.zig

When I use -femit-h for simpler test.zig it works fine and H file is generated. Example test.zig that works fine:

const std = @import("std");

export fn my_max(a: u32, b: u32) u32 {
    return @max(a, b);
}

export fn my_min(a: u32, b: u32) u32 {
    return @min(a, b);
}

Expected Behavior

H file should be emited or minigful error (if not possible) should be displayed

[bridgeQiao]

The crash might be related to your exported 'memset' function naming - I guess :)

[xinzhengzhang]

I also encountered the same issue (both -femit-h and -femit-bin in build-lib).

1. If the type of zig is exported instead of being compatible with c.

   with -femit-h crash withzig(72552,0x1ebff7240) malloc: *** error for object 0xffffffffffffffff: pointer being freed was not allocated zig(72552,0x1ebff7240) malloc: *** set a breakpoint in malloc_error_break to debug zsh: abort and no error message

   with -fno-emit-h The error message why export failed.

2. if -O ReleaseSmall provides, always crash with the above badaccess message.

3. if -O Debug or -O ReleaseSafe It occasionally break down, but it can always recover after some retries (2-3 times). Trying to clean --cache-dir and --global-cache-dir didn't work.