Assertion failed at /deps/zig/src/ir.cpp:11865 in types_match_const_cast_only

[goshhhy]

Semantic Analysis [304/635] Assertion failed at /deps/zig/src/ir.cpp:11865 in types_match_const_cast_only. This is a bug in the Zig compiler.
Unable to dump stack trace: debug info stripped
swimp_sdl...The following command terminated unexpectedly:
/snap/zig/1213/zig build-obj /home/sanae/code/fake2/src/platform/zigsdl/swimp_sdl.zig --library c --library SDL2 --cache-dir /home/sanae/code/fake2/zig-cache --name swimp_sdl -I /usr/include/SDL2 -I /home/sanae/code/fake2/src -isystem /usr/local/include -isystem /usr/include/x86_64-linux-gnu -isystem /usr/include --library-path /usr/local/lib --library-path /usr/lib/x86_64-linux-gnu --library-path /usr/lib --library-path /lib/x86_64-linux-gnu -D _REENTRANT --cache on 

Build failed. The following command failed:
/home/sanae/code/fake2/zig-cache/o/EyDHokQvtENvJMzhQB_v1Ok5UhtEnO8-Y2Fg6iAdS9kkUKAOUPxpzW5aNbfMEpxV/build /snap/zig/1213/zig /home/sanae/code/fake2 /home/sanae/code/fake2/zig-cache

this error occurred while updating an project to the current edge build of zig, from 0.5.0.

this project is an in-place rewrite of a sizeable (~100,000 sloc) c89 codebase, and i have not yet been able to pare this down to a minimal standalone source file that reproduces the issue.

i can provide more information if needed.

[goshhhy]

the following files are all that are needed to reproduce this issue:

vid_sdl.zig

const c = @cImport({
    @cInclude("client.h");
});

extern fn VID_Printf (print_level: c_int, fmt: [*:0]u8, ...) void;

export fn VID_Init() void {
    var ri_local = c.refimport_t {
        .Con_Printf         = VID_Printf,
    };
}

client.h

typedef struct {
    void ( *Con_Printf )( int print_level, char *str, ... );
} refimport_t;

[LemonBoy]

I believe this is fixed by #4359

[goshhhy]

@LemonBoy, I built zig from that tree and tried to build the project again, and came up with the same error.