[wasm][eh] Fix catchless try in interpreter

The "unreachable" state is usually reset in the first catch block.
Ensure that this is done for catchless tries too.

R=clemensb@chromium.org

Bug: chromium:1246712
Change-Id: If746a3fe3158b0bac4b9b02e4978ca444f8ce427
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3157949Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76791}

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

@@ -511,6 +511,17 @@ TEST(Regress1247119) {
   r.Call();
 }
 
+TEST(Regress1246712) {
+  WasmRunner<uint32_t> r(TestExecutionTier::kInterpreter);
+  TestSignatures sigs;
+  const int kExpected = 1;
+  uint8_t except = r.builder().AddException(sigs.v_v());
+  BUILD(r, kExprTry, kWasmI32.value_type_code(), kExprTry,
+        kWasmI32.value_type_code(), kExprThrow, except, kExprEnd, kExprCatchAll,
+        kExprI32Const, kExpected, kExprEnd);
+  CHECK_EQ(kExpected, r.Call());
+}
+
 }  // namespace test_run_wasm_interpreter
 }  // namespace wasm
 }  // namespace internal

test/common/wasm/wasm-interpreter.cc

@@ -931,6 +931,8 @@ class SideTable : public ZoneObject {
                 if (exception_stack.back() == control_stack.size() - 1) {
                   // Close try scope for catch-less try.
                   exception_stack.pop_back();
+                  copy_unreachable();
+                  unreachable = control_stack.back().unreachable;
                 }
                 DCHECK_EQ(*c->pc, kExprTry);
                 constexpr int kUnusedControlIndex = -1;