diff --git a/spec/app/text-mate-grammar-spec.coffee b/spec/app/text-mate-grammar-spec.coffee
index 6d2a8a441..9537e2199 100644
--- a/spec/app/text-mate-grammar-spec.coffee
+++ b/spec/app/text-mate-grammar-spec.coffee
@@ -597,3 +597,20 @@ describe "TextMateGrammar", ->
         tokens = lines[1]
         expect(tokens[2].value).toBe '@"'
         expect(tokens[2].scopes).toEqual ["source.objc++", "meta.function.c", "meta.block.c", "string.quoted.double.objc", "punctuation.definition.string.begin.objc"]
+
+    describe "Java", ->
+      beforeEach ->
+        atom.activatePackage('java-tmbundle', sync: true)
+        grammar = syntax.selectGrammar('Function.java')
+        lines = grammar.tokenizeLines """
+          public void test() {
+          //comment
+          }
+        """
+
+      it "correctly parses single line comments", ->
+        tokens = lines[1]
+        expect(tokens[0].scopes).toEqual ["source.java", "comment.line.double-slash.java", "punctuation.definition.comment.java"]
+        expect(tokens[0].value).toEqual '//'
+        expect(tokens[1].scopes).toEqual ["source.java", "comment.line.double-slash.java"]
+        expect(tokens[1].value).toEqual 'comment'
diff --git a/src/app/text-mate-grammar.coffee b/src/app/text-mate-grammar.coffee
index d4a9016bd..6b244384e 100644
--- a/src/app/text-mate-grammar.coffee
+++ b/src/app/text-mate-grammar.coffee
@@ -159,7 +159,7 @@ class TextMateGrammar
           ruleStack.pop()
 
         [penultimateRule, lastRule] = ruleStack[-2..]
-        if lastRule? and penultimateRule.scopeName == lastRule.scopeName
+        if lastRule?.scopeName? and penultimateRule.scopeName == lastRule.scopeName
           ruleStack.pop()
           tokens.push(new Token(
             value: line[position...line.length]
@@ -203,7 +203,7 @@ class Injections
     return injection.scanner if injection.scanner?
 
     regexes = _.map injection.patterns, (pattern) ->
-      pattern.getRegex(firstLine, position, @anchorPosition)
+      pattern.getRegex(firstLine, position, anchorPosition)
     scanner = new OnigScanner(regexes)
     scanner.patterns = injection.patterns
     scanner.anchored = injection.anchored