ref_transaction_commit(): fix atomicity and avoid fd exhaustion

diff --git a/t/t4049-diff-stat-count.sh b/t/t4049-diff-stat-count.sh
index 5b594e878f7561560fb2a8563b7355a32d4d3914..a34121740a4ab58e8abd16b3a00df5f44d2f1648 100755 (executable)
--- a/t/t4049-diff-stat-count.sh
+++ b/t/t4049-diff-stat-count.sh
@@ -18,7 +18,7 @@ test_expect_success 'mode-only change show as a 0-line change' '
        test_chmod +x b d &&
        echo a >a &&
        echo c >c &&
-       cat >expect <<-\EOF
+       cat >expect <<-\EOF &&
         a | 1 +
         b | 0
         ...
@@ -33,7 +33,7 @@ test_expect_success 'binary changes do not count in lines' '
        echo a >a &&
        echo c >c &&
        cat "$TEST_DIRECTORY"/test-binary-1.png >d &&
-       cat >expect <<-\EOF
+       cat >expect <<-\EOF &&
         a | 1 +
         c | 1 +
         ...
@@ -55,7 +55,7 @@ test_expect_success 'exclude unmerged entries from total file count' '
        done |
        git update-index --index-info &&
        echo d >d &&
-       cat >expect <<-\EOF
+       cat >expect <<-\EOF &&
         a | 1 +
         b | 1 +
         ...