`file exists in multiple modules` with circular path-based dependencies

[Vexu]

Zig Version

0.15.0-dev.355+206bd1ced

Steps to Reproduce and Observed Behavior

To reproduce:

mkdir foo; cd foo
cat << EOF > build.zig.zon
.{
    .name = .foo,
    .version = "0.0.0",
    .fingerprint = 0x8c736521100e1b90,
    .minimum_zig_version = "0.15.0-dev.355+206bd1ced",
    .dependencies = .{
        .bar = .{
            .path = "bar",
        },
    },
    .paths = .{""},
}
EOF
touch build.zig

mkdir bar
cat << EOF > bar/build.zig.zon
.{
    .name = .bar,
    .version = "0.0.0",
    .fingerprint = 0x76ff8caa84040005,
    .minimum_zig_version = "0.15.0-dev.355+206bd1ced",
    .dependencies = .{
        .foo = .{
            .path = "../",
        },
    },
    .paths = .{""},
}
EOF

zig build

$ ./repro.sh
/home/vexu/Documents/zig/translate-c/foo/build.zig:1:1: error: file exists in multiple modules
/home/vexu/Documents/zig/translate-c/foo/build.zig:1:1: note: root of module root.@dependencies..
/home/vexu/Documents/zig/translate-c/foo/build.zig:1:1: note: root of module root.@build

Expected Behavior

I'm not sure if this is supposed to work but I ran into this in ziglang/translate-c@a1fdfc6 so at least there is a use case.

[jayschwa]

I encountered this error in SDL_ttf's continuous integration. SDL_ttf depends on FreeType and HarfBuzz. HarfBuzz also depends on FreeType. Not a circular dependency in this case. SDL_ttf and HarfBuzz both include the same version of FreeType in their build.zig.zon, but only SDL_ttf uses the new hash value for Zig 0.14.x. I'm going to try switching HarfBuzz's build.zig.zon to the new format and see if it resolves the downstream error.

Update: that did resolve the issue.