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-rw-r--r--lisp/gnus/mml1991.el2
-rw-r--r--lisp/gnus/mml2015.el2
2 files changed, 4 insertions, 0 deletions
diff --git a/lisp/gnus/mml1991.el b/lisp/gnus/mml1991.el
index 93b1b5049a8..b2056b2fd0d 100644
--- a/lisp/gnus/mml1991.el
+++ b/lisp/gnus/mml1991.el
@@ -275,6 +275,8 @@ Whether the passphrase is cached at all is controlled by
(mm-decode-content-transfer-encoding cte)))
(let* ((pair (mml-secure-epg-sign 'OpenPGP 'clear))
(signature (car pair)))
+ (unless (stringp signature)
+ (error "Signature failed"))
(delete-region (point-min) (point-max))
(insert
(with-temp-buffer
diff --git a/lisp/gnus/mml2015.el b/lisp/gnus/mml2015.el
index 5980ddb38fe..403b5e1af6a 100644
--- a/lisp/gnus/mml2015.el
+++ b/lisp/gnus/mml2015.el
@@ -958,6 +958,8 @@ If set, it overrides the setting of `mml2015-sign-with-sender'."
(let* ((pair (mml-secure-epg-sign 'OpenPGP t))
(signature (car pair))
(micalg (cdr pair)))
+ (unless (stringp signature)
+ (error "Signature failed"))
(goto-char (point-min))
(insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
boundary))