Fix EH fuzz bugs (#6381)

Due to a typo, the fuzzer was making externrefs when it should have been making
exnrefs. Fix that and also let eh-utils.cpp know that TryTable exists to avoid
an assertion failure.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tools/fuzzing/fuzzing.cpp b/src/tools/fuzzing/fuzzing.cpp
index c1625d726..701822452 100644
--- a/src/tools/fuzzing/fuzzing.cpp
+++ b/src/tools/fuzzing/fuzzing.cpp
@@ -2456,7 +2456,7 @@ Expression* TranslateToFuzzReader::makeBasicRef(Type type) {
       return builder.makeArrayNewFixed(trivialArray, {});
     }
     case HeapType::exn: {
-      auto null = builder.makeRefNull(HeapType::ext);
+      auto null = builder.makeRefNull(HeapType::exn);
       if (!type.isNullable()) {
         assert(funcContext);
         return builder.makeRefAs(RefAsNonNull, null);