ref_transaction_commit(): fix atomicity and avoid fd exhaustion

diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh
index c9f54d5a5ea47a32f71ad7a34d9f6024280c5da0..7be14a4e37f7843d9a9863a21e9181ffeceee11b 100755 (executable)
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -817,25 +817,20 @@ test_expect_success $PREREQ '--confirm=compose' '
        test_confirm --confirm=compose --compose
 '
 
-save_confirm () {
-       CONFIRM=$(git config --get sendemail.confirm) &&
-       test_when_finished "git config sendemail.confirm ${CONFIRM:-never}"
-}
-
 test_expect_success $PREREQ 'confirm by default (due to cc)' '
-       save_confirm &&
+       test_when_finished git config sendemail.confirm never &&
        git config --unset sendemail.confirm &&
        test_confirm
 '
 
 test_expect_success $PREREQ 'confirm by default (due to --compose)' '
-       save_confirm &&
+       test_when_finished git config sendemail.confirm never &&
        git config --unset sendemail.confirm &&
        test_confirm --suppress-cc=all --compose
 '
 
 test_expect_success $PREREQ 'confirm detects EOF (inform assumes y)' '
-       save_confirm &&
+       test_when_finished git config sendemail.confirm never &&
        git config --unset sendemail.confirm &&
        rm -fr outdir &&
        git format-patch -2 -o outdir &&
@@ -848,7 +843,7 @@ test_expect_success $PREREQ 'confirm detects EOF (inform assumes y)' '
 '
 
 test_expect_success $PREREQ 'confirm detects EOF (auto causes failure)' '
-       save_confirm &&
+       test_when_finished git config sendemail.confirm never &&
        git config sendemail.confirm auto &&
        GIT_SEND_EMAIL_NOTTY=1 &&
        export GIT_SEND_EMAIL_NOTTY &&
@@ -860,7 +855,7 @@ test_expect_success $PREREQ 'confirm detects EOF (auto causes failure)' '
 '
 
 test_expect_success $PREREQ 'confirm does not loop forever' '
-       save_confirm &&
+       test_when_finished git config sendemail.confirm never &&
        git config sendemail.confirm auto &&
        GIT_SEND_EMAIL_NOTTY=1 &&
        export GIT_SEND_EMAIL_NOTTY &&