Error When Using Own Type in Union as `map` Key

[dozn]

Context

package main
S :: struct { data: map[U]int }
U :: union { S }

I don't believe we allow the struct itself in which a map is located in to be used as a key, but the union is bypassing the check or something, otherwise it would spit out Invalid type of a key for a map, got 'S'.

Current Behavior

D:\Programming\Odin\src\types.cpp(4133): Assertion Failure: t->Struct.fields.count == 0 || t->Struct.offsets != nullptr

Expected Behavior

No C++ error.

---

Odin: dev-2025-01:600e0ebed OS: Windows 11 Professional (version: 23H2), build 22631.4602 CPU: AMD Ryzen 7 3700X 8-Core Processor RAM: 65457 MiB Backend: LLVM 18.1.8

[dozn]

Still occurs using dev-2025-06:805f7ce97