[EH] Fix assumption that all throw_refs are created from rethrows #6524
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`shouldBeRef` incorrectly assumed that all `throw_ref`s within a `catch` body had been generated from `rethrow`s, which was not true, because `throw_ref`s are also created when translating `try`-`delegate`s: https://github.com/WebAssembly/binaryen/blob/219e668e87b012c0634043ed702534b8be31231f/src/passes/TranslateEH.cpp#L304 This fixes the assumption and changes `cast` to `dynCast`.
kripken
approved these changes
Apr 23, 2024
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shouldBeRefincorrectly assumed that allthrow_refs within acatchbody had been generated fromrethrows, which was not true, becausethrow_refs are also created when translatingtry-delegates:binaryen/src/passes/TranslateEH.cpp
Line 304 in 219e668
This fixes the assumption and changes
casttodynCast.