1 files changed, 8 insertions, 0 deletions
diff --git a/src/wasm/wasm.cpp b/src/wasm/wasm.cpp
index 5b1163ae0..0dfcf5c2e 100644
--- a/src/wasm/wasm.cpp
+++ b/src/wasm/wasm.cpp
@@ -959,9 +959,17 @@ Type BrOn::getSentType() {
       // BrOnNull does not send a value on the branch.
       return Type::none;
     case BrOnNonNull:
+      // If the input is unreachable, the branch is not taken, and there is no
+      // valid type we can report as being sent. Report it as unreachable.
+      if (ref->type == Type::unreachable) {
+        return Type::unreachable;
+      }
       // BrOnNonNull sends the non-nullable type on the branch.
       return Type(ref->type.getHeapType(), NonNullable);
     case BrOnCast:
+      if (ref->type == Type::unreachable) {
+        return Type::unreachable;
+      }
       return Type(rtt->type.getHeapType(), NonNullable);
     case BrOnFunc:
       return Type::funcref;