[PATCH] test/thread-order: more robust loop exit in case of broken input

[Tomi Ollila]

When creating $THREADS data it may end of not having 'None' at all
or the numbers in line output yields a loop.

To avoid loop the value in current array index is set to 'None'
so that if the same item is reached again the loop will end.

Also empty string as next array index will end the loop.
---

This is v2 of id:1427310460-15801-1-git-send-email-tomi.ollila at iki.fi

Tested loop termination by setting THREADS='0 0 0 0'


 test/T260-thread-order.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/test/T260-thread-order.sh b/test/T260-thread-order.sh
index 99f5833..5239bd4 100755
--- a/test/T260-thread-order.sh
+++ b/test/T260-thread-order.sh
@@ -45,9 +45,12 @@ for ((n = 0; n < 4; n++)); do
     while read -a parents; do
         references=""
         parent=${parents[$n]}
-        while [[ $parent != None ]]; do
+        while [[ ${parent:-None} != None ]]; do
             references="<m$parent at t$thread> $references"
+            pp=$parent
             parent=${parents[$parent]}
+            # Avoid looping over broken input (if ever)
+            parents[$pp]="None"
         done
 
         generate_message \
-- 
2.1.0