Fixes #1714

lib/coffee-script/lexer.js

@@ -347,6 +347,7 @@
         }
       }
       if (value === ';') {
+        this.seenFor = false;
         tag = 'TERMINATOR';
       } else if (__indexOf.call(MATH, value) >= 0) {
         tag = 'MATH';

src/lexer.coffee

@@ -329,7 +329,9 @@ exports.Lexer = class Lexer
         prev[0] = 'COMPOUND_ASSIGN'
         prev[1] += '='
         return value.length
-    if      value is ';'             then tag = 'TERMINATOR'
+    if value is ';'             
+     @seenFor = no
+     tag = 'TERMINATOR'
     else if value in MATH            then tag = 'MATH'
     else if value in COMPARE         then tag = 'COMPARE'
     else if value in COMPOUND_ASSIGN then tag = 'COMPOUND_ASSIGN'

test/operators.coffee

@@ -201,7 +201,12 @@ test "#1630: `in` should check `hasOwnProperty`", ->
   ok undefined not in length: 1
   
 test "#1714: lexer bug with raw range `for` followed by `in`", ->
-  0 for [1..10]
+  0 for [1..2]
+  ok not ('a' in ['b'])
+  
+  0 for [1..2]; ok not ('a' in ['b'])
+  
+  0 for [1..10] # comment ending
   ok not ('a' in ['b'])