Merge from origin/emacs-26

3e72298 Improve documentation of 'pcase-defmacro rx'
ba9b9bb Fix TTY colors breakage by 'clear-face-cache'
f56ad42 * admin/MAINTAINERS: Add files maintained by me (Michael Albi...
7a258fa Adapt shadowfile.el for Tramp  (Bug#4526, Bug#4846)
cb50077 Fix auth-source-delete (Bug#26184)
a4767a6 Avoid assertion violations in gnutls.c
90110f8 Don't use a literal "C-u" in ispell.el  help message text
f4e7f6d Improve documentation of 'seqp'
ed13639 Clarify usage and dependencies between several Flyspell features

Conflicts:
	etc/NEWS
	test/lisp/auth-source-tests.el

1 files changed, 32 insertions, 6 deletions

diff --git a/src/gnutls.c b/src/gnutls.c
index d7a4ee474f7..4e98f16f484 100644
--- a/src/gnutls.c
+++ b/src/gnutls.c
@@ -2071,7 +2071,14 @@ gnutls_symmetric (bool encrypting, Lisp_Object cipher,
     cipher = intern (SSDATA (cipher));
 
   if (SYMBOLP (cipher))
-    info = XCDR (Fassq (cipher, Fgnutls_ciphers ()));
+    {
+      info = Fassq (cipher, Fgnutls_ciphers ());
+      if (!CONSP (info))
+	xsignal2 (Qerror,
+		  build_string ("GnuTLS cipher is invalid or not found"),
+		  cipher);
+      info = XCDR (info);
+    }
   else if (TYPE_RANGED_INTEGERP (gnutls_cipher_algorithm_t, cipher))
     gca = XINT (cipher);
   else
@@ -2086,7 +2093,8 @@ gnutls_symmetric (bool encrypting, Lisp_Object cipher,
 
   ptrdiff_t key_size = gnutls_cipher_get_key_size (gca);
   if (key_size == 0)
-    error ("GnuTLS cipher is invalid or not found");
+    xsignal2 (Qerror,
+	      build_string ("GnuTLS cipher is invalid or not found"), cipher);
 
   ptrdiff_t kstart_byte, kend_byte;
   const char *kdata = extract_data_from_object (key, &kstart_byte, &kend_byte);
@@ -2342,7 +2350,14 @@ itself. */)
     hash_method = intern (SSDATA (hash_method));
 
   if (SYMBOLP (hash_method))
-    info = XCDR (Fassq (hash_method, Fgnutls_macs ()));
+    {
+      info = Fassq (hash_method, Fgnutls_macs ());
+      if (!CONSP (info))
+	xsignal2 (Qerror,
+		  build_string ("GnuTLS MAC-method is invalid or not found"),
+		  hash_method);
+      info = XCDR (info);
+    }
   else if (TYPE_RANGED_INTEGERP (gnutls_mac_algorithm_t, hash_method))
     gma = XINT (hash_method);
   else
@@ -2357,7 +2372,9 @@ itself. */)
 
   ptrdiff_t digest_length = gnutls_hmac_get_len (gma);
   if (digest_length == 0)
-    error ("GnuTLS MAC-method is invalid or not found");
+    xsignal2 (Qerror,
+	      build_string ("GnuTLS MAC-method is invalid or not found"),
+	      hash_method);
 
   ptrdiff_t kstart_byte, kend_byte;
   const char *kdata = extract_data_from_object (key, &kstart_byte, &kend_byte);
@@ -2423,7 +2440,14 @@ the number itself. */)
     digest_method = intern (SSDATA (digest_method));
 
   if (SYMBOLP (digest_method))
-    info = XCDR (Fassq (digest_method, Fgnutls_digests ()));
+    {
+      info = Fassq (digest_method, Fgnutls_digests ());
+      if (!CONSP (info))
+	xsignal2 (Qerror,
+		  build_string ("GnuTLS digest-method is invalid or not found"),
+		  digest_method);
+      info = XCDR (info);
+    }
   else if (TYPE_RANGED_INTEGERP (gnutls_digest_algorithm_t, digest_method))
     gda = XINT (digest_method);
   else
@@ -2438,7 +2462,9 @@ the number itself. */)
 
   ptrdiff_t digest_length = gnutls_hash_get_len (gda);
   if (digest_length == 0)
-    error ("GnuTLS digest-method is invalid or not found");
+    xsignal2 (Qerror,
+	      build_string ("GnuTLS digest-method is invalid or not found"),
+	      digest_method);
 
   gnutls_hash_hd_t hash;
   int ret = gnutls_hash_init (&hash, gda);