Merge pull request #1573 from brendandahl/issue-1516

Handle junk at the end of postscript functions.

src/function.js

@@ -836,7 +836,10 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
       // operator
       var str = ch.toLowerCase();
       while (true) {
-        ch = stream.lookChar().toLowerCase();
+        ch = stream.lookChar();
+        if (ch === null)
+          break;
+        ch = ch.toLowerCase();
         if (ch >= 'a' && ch <= 'z')
           str += ch;
         else

test/unit/function_spec.js

@@ -77,6 +77,12 @@ describe('function', function() {
       expect(function() { parse('{'); }).toThrow(
                   new Error('Unexpected symbol: found undefined expected 1.'));
     });
+    it('handles junk after the end', function() {
+      var number = 3.3;
+      var program = parse('{ ' + number + ' }#');
+      var expectedProgram = [number];
+      expect(program).toMatchArray(expectedProgram);
+    });
   });
 
   describe('PostScriptEvaluator', function() {