Segfault when using invalid directory with `zig test --zig-lib-dir`

[jeffective]

Zig Version

0.14.0-dev.2362+a47aa9dd9

Steps to Reproduce and Observed Behavior

$ zig version
0.14.0-dev.2362+a47aa9dd9
$ mkdir segfault
$ cd segfault/
$ zig init
info: created build.zig
info: created build.zig.zon
info: created src/main.zig
info: created src/root.zig
info: see `zig build --help` for a menu of options
$ zig build
$ zig test --zig-lib-dir src src/root.zig 
Segmentation fault

I think it has something to do with the presence of the zig build cache, I can't get a reproduction without the presence of a built project.

Expected Behavior

Compiler should not segfault and report error regarding invalid zig lib directory

[Rexicon226]

Stack Trace

/Users/david/Code/zig/lib/std/debug.zig:405:14: 0x10928e14f in assert (zig)
    if (!ok) unreachable; // assertion failure
             ^
/Users/david/Code/zig/src/Type.zig:429:11: 0x1093347e7 in fromInterned (zig)
    assert(i != .none);
          ^
/Users/david/Code/zig/src/Zcu/PerThread.zig:3128:39: 0x10a186d4b in getBuiltinNav (zig)
    const std_type = Type.fromInterned(zcu.fileRootType(std_file_imported.file_index));
                                      ^
/Users/david/Code/zig/src/Sema.zig:39142:37: 0x109d42b43 in getBuiltin (zig)
    const nav = try pt.getBuiltinNav(name);
                                    ^
/Users/david/Code/zig/src/Sema.zig:39107:40: 0x10995d1b7 in getBuiltinType (zig)
    const ty_inst = try sema.getBuiltin(name);
                                       ^
/Users/david/Code/zig/src/Sema.zig:6945:51: 0x10a557dc3 in analyzeSaveErrRetIndex (zig)
    const stack_trace_ty = try sema.getBuiltinType("StackTrace");
                                                  ^
/Users/david/Code/zig/src/Zcu/PerThread.zig:2207:69: 0x10a0fe94f in analyzeFnBody (zig)
    const error_return_trace_index = try sema.analyzeSaveErrRetIndex(&inner_block);
                                                                    ^
/Users/david/Code/zig/src/Zcu/PerThread.zig:832:35: 0x109ceaed3 in ensureFuncBodyAnalyzedInner (zig)
    var air = try pt.analyzeFnBody(func_index);
                                  ^