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-rw-r--r--src/wasm-validator.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/wasm-validator.h b/src/wasm-validator.h
index b4818e253..ca89270e9 100644
--- a/src/wasm-validator.h
+++ b/src/wasm-validator.h
@@ -283,6 +283,7 @@ public:
void visitReturn(Return* curr) {
if (curr->value) {
+ shouldBeFalse(curr->value->is<Nop>(), curr, "cannot return a nop");
if (returnType == unreachable) {
returnType = curr->value->type;
} else if (curr->value->type != unreachable && returnType != curr->value->type) {