t7510-signed-commit.sh hangs on old gpg, regression in 1bfb57f642d (was: [PATCH v8 9/9] ssh signing: test that gpg fails for unknown keys)

> From: Fabian Stelzer <fs@gigacodes.de>
>
> Test that verify-commit/tag will fail when a gpg key is completely
> unknown. To do this we have to generate a key, use it for a signature
> and delete it from our keyring aferwards completely.
>
> Signed-off-by: Fabian Stelzer <fs@gigacodes.de>
> ---
>  t/t7510-signed-commit.sh | 29 ++++++++++++++++++++++++++++-
>  1 file changed, 28 insertions(+), 1 deletion(-)
>
> diff --git a/t/t7510-signed-commit.sh b/t/t7510-signed-commit.sh
> index 8df5a74f1db..d65a0171f29 100755
> --- a/t/t7510-signed-commit.sh
> +++ b/t/t7510-signed-commit.sh
> @@ -71,7 +71,25 @@ test_expect_success GPG 'create signed commits' '
>  	git tag eleventh-signed $(cat oid) &&
>  	echo 12 | git commit-tree --gpg-sign=B7227189 HEAD^{tree} >oid &&
>  	test_line_count = 1 oid &&
> -	git tag twelfth-signed-alt $(cat oid)
> +	git tag twelfth-signed-alt $(cat oid) &&
> +
> +	cat >keydetails <<-\EOF &&
> +	Key-Type: RSA
> +	Key-Length: 2048
> +	Subkey-Type: RSA
> +	Subkey-Length: 2048
> +	Name-Real: Unknown User
> +	Name-Email: unknown@git.com
> +	Expire-Date: 0
> +	%no-ask-passphrase
> +	%no-protection
> +	EOF
> +	gpg --batch --gen-key keydetails &&
> +	echo 13 >file && git commit -a -S"unknown@git.com" -m thirteenth &&
> +	git tag thirteenth-signed &&
> +	DELETE_FINGERPRINT=$(gpg -K --with-colons --fingerprint --batch unknown@git.com | grep "^fpr" | head -n 1 | awk -F ":" "{print \$10;}") &&
> +	gpg --batch --yes --delete-secret-keys $DELETE_FINGERPRINT &&
> +	gpg --batch --yes --delete-keys unknown@git.com
>  '
>  
>  test_expect_success GPG 'verify and show signatures' '
> @@ -110,6 +128,13 @@ test_expect_success GPG 'verify and show signatures' '
>  	)
>  '
>  
> +test_expect_success GPG 'verify-commit exits failure on unknown signature' '
> +	test_must_fail git verify-commit thirteenth-signed 2>actual &&
> +	! grep "Good signature from" actual &&
> +	! grep "BAD signature from" actual &&
> +	grep -q -F -e "No public key" -e "public key not found" actual
> +'
> +
>  test_expect_success GPG 'verify-commit exits success on untrusted signature' '
>  	git verify-commit eighth-signed-alt 2>actual &&
>  	grep "Good signature from" actual &&
> @@ -338,6 +363,8 @@ test_expect_success GPG 'show double signature with custom format' '
>  '
>  
>  
> +# NEEDSWORK: This test relies on the test_tick commit/author dates from the first
> +# 'create signed commits' test even though it creates its own
>  test_expect_success GPG 'verify-commit verifies multiply signed commits' '
>  	git init multiply-signed &&
>  	cd multiply-signed &&