From edbabe54bc1e52cec4841a6c9b2d643807d39c7b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mislav=20Marohni=C4=87?= <mislav.marohnic@gmail.com>
Date: Tue, 29 Oct 2013 02:23:38 +0100
Subject: [PATCH] Safely increment in a way that it works on Linux

Otherwise the CI is broken but still exits with 0 status:
https://travis-ci.org/sstephenson/bats/builds/13173769
---
 libexec/bats-exec-test | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libexec/bats-exec-test b/libexec/bats-exec-test
index bbbd411..4b85b44 100755
--- a/libexec/bats-exec-test
+++ b/libexec/bats-exec-test
@@ -97,7 +97,7 @@ bats_capture_stack_trace() {
       if [[ "$frame" = *"$test_pattern" ]]; then
         break
       else
-        ((index++))
+        index=$((index+1))
       fi
     done
   fi