[wasm] W.validate should not throw on failure

src/wasm/wasm-result.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/wasm/wasm-result.h"
 
 #include "src/factory.h"
 #include "src/heap/heap.h"
 #include "src/isolate-inl.h"
 #include "src/objects.h"
@@ skipping 46 matching lines @@
 void ErrorThrower::RangeError(const char* format, ...) {
   if (error()) return;
   va_list arguments;
   va_start(arguments, format);
   Format(isolate_->range_error_function(), format, arguments);
   va_end(arguments);
 }
 
 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);
   va_end(arguments);
 }
 
 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);
   va_end(arguments);
 }
 
 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);
   va_end(arguments);
 }
 
 ErrorThrower::~ErrorThrower() {
   if (error() && !isolate_->has_pending_exception()) {
     isolate_->ScheduleThrow(*exception_);
   }
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8