Check for tabs in source line in DisplayExceptionLine

Fix for nodejs#3280

Author: Sannis

src/node.cc

@@ -1271,13 +1271,13 @@ void DisplayExceptionLine (TryCatch &try_catch) {
     // Print wavy underline (GetUnderline is deprecated).
     int start = message->GetStartColumn();
     for (int i = offset; i < start; i++) {
-      fprintf(stderr, " ");
+      fputc((sourceline_string[i] == '\t') ? '\t' : ' ', stderr);
     }
     int end = message->GetEndColumn();
     for (int i = start; i < end; i++) {
-      fprintf(stderr, "^");
+      fputc('^', stderr);
     }
-    fprintf(stderr, "\n");
+    fputc('\n', stderr);
   }
 }
 

test/message/throw_in_line_with_tabs.js

@@ -0,0 +1,35 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+
+
+var common = require('../common');
+var assert = require('assert');
+
+common.error('before');
+
+(function () {
+	// these lines should contain tab!
+	throw ({ foo: 'bar' });
+})();
+
+common.error('after');

test/message/throw_in_line_with_tabs.out

@@ -0,0 +1,6 @@
+before
+
+*/test/message/throw_in_line_with_tabs.js:32
+	throw ({ foo: 'bar' });
+	^
+[object Object]