[wasm] W.validate should not throw on failure

src/wasm/wasm-result.cc

Index: src/wasm/wasm-result.cc
diff --git a/src/wasm/wasm-result.cc b/src/wasm/wasm-result.cc
index 99111c6a5489c04f8646d600779e35ce3c3b925e..e22f9ad4428bf6d1061b393c7deff6770b53cb37 100644
--- a/src/wasm/wasm-result.cc
+++ b/src/wasm/wasm-result.cc
@@ -64,6 +64,7 @@ void ErrorThrower::RangeError(const char* format, ...) {
 
 void ErrorThrower::CompileError(const char* format, ...) {
   if (error()) return;
+  wasm_error_ = true;
   va_list arguments;
   va_start(arguments, format);
   Format(isolate_->wasm_compile_error_function(), format, arguments);
@@ -72,6 +73,7 @@ void ErrorThrower::CompileError(const char* format, ...) {
 
 void ErrorThrower::LinkError(const char* format, ...) {
   if (error()) return;
+  wasm_error_ = true;
   va_list arguments;
   va_start(arguments, format);
   Format(isolate_->wasm_link_error_function(), format, arguments);
@@ -80,6 +82,7 @@ void ErrorThrower::LinkError(const char* format, ...) {
 
 void ErrorThrower::RuntimeError(const char* format, ...) {
   if (error()) return;
+  wasm_error_ = true;
   va_list arguments;
   va_start(arguments, format);
   Format(isolate_->wasm_runtime_error_function(), format, arguments);