am: suppress apply errors when using 3-way

diff --git a/t/t3402-rebase-merge.sh b/t/t3402-rebase-merge.sh
index 0779aaa9aba16f0f8502505b4df5cc49cfe8af82..7b7d07269ae35f56dd02a223f350ae0da97bae85 100755 (executable)
--- a/t/t3402-rebase-merge.sh
+++ b/t/t3402-rebase-merge.sh
@@ -48,9 +48,14 @@ test_expect_success 'reference merge' '
        git merge -s recursive "reference merge" HEAD master
 '
 
+PRE_REBASE=$(git rev-parse test-rebase)
 test_expect_success rebase '
        git checkout test-rebase &&
-       git rebase --merge master
+       GIT_TRACE=1 git rebase --merge master
+'
+
+test_expect_success 'test-rebase@{1} is pre rebase' '
+       test $PRE_REBASE = $(git rev-parse test-rebase@{1})
 '
 
 test_expect_success 'merge and rebase should match' '