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-rw-r--r--src/wasm/wasm-validator.cpp15
1 files changed, 6 insertions, 9 deletions
diff --git a/src/wasm/wasm-validator.cpp b/src/wasm/wasm-validator.cpp
index 8def0e529..c6d0d9fe7 100644
--- a/src/wasm/wasm-validator.cpp
+++ b/src/wasm/wasm-validator.cpp
@@ -2215,15 +2215,12 @@ void FunctionValidator::visitBrOnCast(BrOnCast* curr) {
shouldBeTrue(
curr->ref->type.isRef(), curr, "br_on_cast ref must have ref type");
}
- if (curr->rtt->type != Type::unreachable) {
- shouldBeTrue(
- curr->rtt->type.isRtt(), curr, "br_on_cast rtt must have rtt type");
- shouldBeEqual(curr->rtt->type.getHeapType(),
- curr->castType.getHeapType(),
- curr,
- "br_on_cast rtt must have the proper heap type");
- noteBreak(curr->name, curr->castType, curr);
- }
+ // Note that an unreachable rtt is not supported: the text and binary formats
+ // do not provide the type, so if it's unreachable we should not even create
+ // a br_on_cast in such a case, as we'd have no idea what it casts to.
+ shouldBeTrue(
+ curr->rtt->type.isRtt(), curr, "br_on_cast rtt must have rtt type");
+ noteBreak(curr->name, curr->getCastType(), curr);
}
void FunctionValidator::visitRttCanon(RttCanon* curr) {