Bug 1235989 - Add a null check for filename in ModuleValidator::finish. r=luke

js/src/asmjs/AsmJS.cpp

@@ -2034,9 +2034,12 @@ class MOZ_STACK_CLASS ModuleValidator
 
         auto mutedErrors = Module::MutedBool(parser_.ss->mutedErrors());
 
-        CacheableChars filename = make_string_copy(parser_.ss->filename());
+        CacheableChars filename;
+        if (parser_.ss->filename()) {
+            filename = make_string_copy(parser_.ss->filename());
             if (!filename)
                 return false;
+        }
 
         CacheableTwoByteChars displayURL;
         if (parser_.ss->hasDisplayURL()) {
@@ -6738,7 +6741,6 @@ CheckSwitch(FunctionValidator& f, ParseNode* switchStmt)
 
         if (!CheckStatement(f, CaseBody(stmt)))
             return false;
-
     }
 
     bool hasDefault = false;

js/src/asmjs/WasmIonCompile.cpp

@@ -3075,7 +3075,6 @@ wasm::IonCompileFunction(IonCompileTask* task)
 
     // Compile MIR graph
     {
-
         jit::SpewBeginFunction(&mir, nullptr);
         jit::AutoSpewEndFunction spewEndFunction(&mir);