Fixes crash on trailing combinator.

Author: ben-eb

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 1.2.1
+
+* Fixes a crash when the parser encountered a trailing combinator.
+
 # 1.2.0
 
 * A more descriptive error is thrown when the parser expects to find a

src/__tests__/combinators.js

@@ -97,3 +97,9 @@ test('multiple combinators with whitespaces', 'h1+ h2 >h3', (t, tree) => {
     t.equal(tree.nodes[0].nodes[1].value, '+', 'should have a combinator');
     t.equal(tree.nodes[0].nodes[3].value, '>', 'should have a combinator');
 });
+
+test('trailing combinator & spaces', 'p +        ', (t, tree) => {
+    t.plan(2);
+    t.equal(tree.nodes[0].nodes[0].value, 'p', 'should be a paragraph');
+    t.equal(tree.nodes[0].nodes[1].value, '+', 'should have a combinator');
+});

src/parser.js

@@ -101,10 +101,10 @@ export default class Parser {
             },
             sourceIndex: this.currToken[4]
         });
-        while ( this.position < this.tokens.length &&
-                this.currToken[0] === 'space' ||
-                this.currToken[0] === 'combinator') {
-            if (this.nextToken[0] === 'combinator') {
+        while ( this.position < this.tokens.length && this.currToken &&
+                (this.currToken[0] === 'space' ||
+                this.currToken[0] === 'combinator')) {
+            if (this.nextToken && this.nextToken[0] === 'combinator') {
                 combinator.spaces.before = this.currToken[1];
                 combinator.source.start.line = this.nextToken[2];
                 combinator.source.start.column = this.nextToken[3];