A possible compiler bug in WasmGC backend

[FlammeShadow]

The following code cannot be built by WasmGC backend, but outputs K1(T1(12)) in Wasm backend.

enum Test {
  T1(Int)
  T2
  T3
} derive(Show)

type K1 Test derive(Show)

type K2 Test derive(Show)

struct S {
  a : K1?
  b : K2?
} derive(Show)

fn meth(self : S) -> Unit {
  match self.a {
    Some(K1(T1(_)) as a) => println(a)
    Some(K1(T2)) => println("T2")
  }
}

test {
  let s = { a: Some(T1(12)), b: Some(T2) }
  s.meth()
}

The code will be successfully compiled if we delete as a in Some(K1(T1(_)) as a) => println(a). Or it will report ICE:

Error: Moonc.Basic_hash_string.Key_not_found("$Test.K1")```

[Yu-zh]

Thanks for reporting the bug. We will have it fixed in the next release.