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Parse bug with extra non-nullable br_on_cast values #8949
Description
(module
(type $s (struct))
(func (param $s (ref $s)) (result (ref $s) (ref $s))
local.get $s
local.get $s
br_on_cast 0 (ref $s) (ref $s)
)
)
[wasm-validator error in function 0] unexpected false: non-nullable local's sets must dominate gets
Looks like we're not setting up the scratch locals quite right. It doesn't look like we're properly preserving exact results, either.
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