--- a/js/src/shell/js.cpp
+++ b/js/src/shell/js.cpp
@@ -8910,30 +8910,36 @@ Shell(JSContext* cx, OptionParser* op, c
      * This printing depends on atoms still existing.
      */
     for (CompartmentsIter c(cx->runtime()); !c.done(); c.next())
         PrintTypes(cx, c, false);
 
     return result;
 }
 
+// Used to allocate memory when jemalloc isn't yet initialized.
+JS_DECLARE_NEW_METHODS(SystemAlloc_New, malloc, static)
+
 static void
 SetOutputFile(const char* const envVar,
               RCFile* defaultOut,
               RCFile** outFileP)
 {
     RCFile* outFile;
 
     const char* outPath = getenv(envVar);
     FILE* newfp;
     if (outPath && *outPath && (newfp = fopen(outPath, "w")))
-        outFile = js_new<RCFile>(newfp);
+        outFile = SystemAlloc_New<RCFile>(newfp);
     else
         outFile = defaultOut;
 
+    if (!outFile)
+        MOZ_CRASH("Failed to allocate output file");
+
     outFile->acquire();
     *outFileP = outFile;
 }
 
 static void
 PreInit()
 {
 #ifdef XP_WIN