do not segfault if make_cache_entry failed

diff --git a/t/t6002-rev-list-bisect.sh b/t/t6002-rev-list-bisect.sh
index 8f5de097ecd703ae5f6f889ecb735f7277f361be..b4e8fbaa5e6f2a56094c05ca505630669a51e101 100755 (executable)
--- a/t/t6002-rev-list-bisect.sh
+++ b/t/t6002-rev-list-bisect.sh
@@ -5,7 +5,7 @@
 test_description='Tests git rev-list --bisect functionality'
 
 . ./test-lib.sh
-. ../t6000lib.sh # t6xxx specific functions
+. "$TEST_DIRECTORY"/t6000lib.sh # t6xxx specific functions
 
 # usage: test_bisection max-diff bisect-option head ^prune...
 #