Bug 370028 - Unbuffer stdout in xpcshell so that its output during unit tests is in execution order. r+sr=brendan

js/src/xpconnect/shell/xpcshell.cpp

@@ -964,6 +964,10 @@ main(int argc, char **argv, char **envp)
     int result;
     nsresult rv;
 
+    // unbuffer stdout so that output is in the correct order; note that stderr
+    // is unbuffered by default
+    setbuf(stdout, 0);
+
     gErrFile = stderr;
     gOutFile = stdout;
     {