do not segfault if make_cache_entry failed

diff --git a/t/t1500-rev-parse.sh b/t/t1500-rev-parse.sh
index 38a2bf09af286bf681deadb9cdaec80175d13e0c..85da4caa7ed1b8bcaca7b21e218f2d1839d2db82 100755 (executable)
--- a/t/t1500-rev-parse.sh
+++ b/t/t1500-rev-parse.sh
@@ -51,8 +51,9 @@ test_rev_parse 'core.bare undefined' false false true
 
 mkdir work || exit 1
 cd work || exit 1
-export GIT_DIR=../.git
-export GIT_CONFIG="$(pwd)"/../.git/config
+GIT_DIR=../.git
+GIT_CONFIG="$(pwd)"/../.git/config
+export GIT_DIR GIT_CONFIG
 
 git config core.bare false
 test_rev_parse 'GIT_DIR=../.git, core.bare = false' false false true ''
@@ -64,8 +65,8 @@ git config --unset core.bare
 test_rev_parse 'GIT_DIR=../.git, core.bare undefined' false false true ''
 
 mv ../.git ../repo.git || exit 1
-export GIT_DIR=../repo.git
-export GIT_CONFIG="$(pwd)"/../repo.git/config
+GIT_DIR=../repo.git
+GIT_CONFIG="$(pwd)"/../repo.git/config
 
 git config core.bare false
 test_rev_parse 'GIT_DIR=../repo.git, core.bare = false' false false true ''