[wasm] Avoid crashing if parsing fails in asm -> wasm.

src/wasm/wasm-js.cc

Index: src/wasm/wasm-js.cc
diff --git a/src/wasm/wasm-js.cc b/src/wasm/wasm-js.cc
index 8980d019b534e81103b3543fe07f60b59a81802f..8ca9a78d794353c3116bfdc3423c5a6a9b6b6496 100644
--- a/src/wasm/wasm-js.cc
+++ b/src/wasm/wasm-js.cc
@@ -132,7 +132,10 @@ v8::internal::wasm::WasmModuleIndex* TranslateAsmModule(i::ParseInfo* info) {
   info->set_allow_lazy_parsing(false);
   info->set_toplevel(true);
 
-  CHECK(i::Compiler::ParseAndAnalyze(info));
+  if (!i::Compiler::ParseAndAnalyze(info)) {
+    return nullptr;
+  }
+
   info->set_literal(
       info->scope()->declarations()->at(0)->AsFunctionDeclaration()->fun());