Guard against checking if EOF is an invalid character.

Some encodings use a simple array lookup and EOF (-1) will always be an invalid index.
jruby · Apr 6, 2015 · 2042347 · 2042347 · nirvdrum · Apr 6, 2015
1 parent c5b3e02
commit 2042347
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/core/src/main/java/org/jruby/lexer/yacc/RubyLexer.java b/core/src/main/java/org/jruby/lexer/yacc/RubyLexer.java
@@ -1886,7 +1886,7 @@ private int identifier(int c, boolean commandState) throws IOException {
         do {
             if (!tokadd_mbchar(c)) return EOF;
             c = nextc();
-        } while (isIdentifierChar(c));
+        } while (c != EOF && isIdentifierChar(c));
 
         boolean lastBangOrPredicate = false;