From 99d23a812164d17b9d8062ff5eac9eae04cbe950 Mon Sep 17 00:00:00 2001
From: Pieter Kockx <pieterkockx@gmail.com>
Date: Wed, 4 Oct 2017 02:25:41 +0200
Subject: [PATCH] tr: Fix infinite loop

When `makeset` got a string containing square brackets
followed by at least one extra character, e.g. "[abc]d",
it entered an infinite loop because it was assumed
`j` could not exceed `len` without having been equal to `len`.
It can, however, when `m == len` and subsequently `j = m + 1`.
---
 tr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tr.c b/tr.c
index c235215..c5dbe7e 100644
--- a/tr.c
+++ b/tr.c
@@ -85,7 +85,7 @@ makeset(char *str, struct range **set, int (**check)(Rune))
 		if (rstr[i] == '[') {
 			j = i;
 nextbrack:
-			if (j == len)
+			if (j >= len)
 				goto literal;
 			for (m = j; m < len; m++)
 				if (rstr[m] == ']') {
-- 
2.13.5