[wasm][interpreter] Fix catch-less try

Because of catch-less try blocks, we have to check the exception stack
one more time so that we don't try to rethrow to an outer try scope if
this is already the outermost one.

R=clemensb@chromium.org

Bug: chromium:1219746
Change-Id: I6ad7e4afec669f04bc10197998db5d6eb38a2205
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2983205Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75355}

test/cctest/wasm/test-run-wasm-exceptions.cc

@@ -710,6 +710,14 @@ TEST(Regress1212396) {
   CHECK_EQ(42, r.CallInterpreter());
 }
 
+TEST(Regress1219746) {
+  TestSignatures sigs;
+  EXPERIMENTAL_FLAG_SCOPE(eh);
+  WasmRunner<int32_t> r(TestExecutionTier::kInterpreter);
+  BUILD(r, kExprTry, kVoidCode, kExprI32Const, 0, kExprEnd);
+  CHECK_EQ(0, r.CallInterpreter());
+}
+
 }  // namespace test_run_wasm_exceptions
 }  // namespace wasm
 }  // namespace internal

test/common/wasm/wasm-interpreter.cc

@@ -942,7 +942,7 @@ class SideTable : public ZoneObject {
                     !unreachable,
                     stack_height >= c->else_label->target_stack_height);
                 stack_height = c->else_label->target_stack_height;
-                rethrow = !unreachable;
+                rethrow = !unreachable && !exception_stack.empty();
               }
             }
             c->end_label->Bind(i.pc() + 1);