Fuzz fix for DuplicateFunctionElimination (#3204)

The replaceFunctions utility replaced exports by name, but did not check
the kind, so it could get confused when names happen to overlap.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/passes/opt-utils.h b/src/passes/opt-utils.h
index 7912a7d92..cc0f40c54 100644
--- a/src/passes/opt-utils.h
+++ b/src/passes/opt-utils.h
@@ -97,7 +97,9 @@ inline void replaceFunctions(PassRunner* runner,
   }
   // replace in exports
   for (auto& exp : module.exports) {
-    maybeReplace(exp->value);
+    if (exp->kind == ExternalKind::Function) {
+      maybeReplace(exp->value);
+    }
   }
 }