patch 7.4.2225

Problem:    Crash when placing a sign in a deleted buffer.
Solution:   Check for missing buffer name. (Dominique Pelle). Add a test.

src/ex_cmds.c

@@ -7861,6 +7861,11 @@ ex_sign(exarg_T *eap)
 		{			/* ... not currently in a window */
 		    char_u	*cmd;
 
+		    if (buf->b_fname == NULL)
+		    {
+			EMSG(_("E934: Cannot jump to a buffer that does not have a name"));
+			return;
+		    }
 		    cmd = alloc((unsigned)STRLEN(buf->b_fname) + 25);
 		    if (cmd == NULL)
 			return;

src/testdir/test_signs.vim

@@ -181,3 +181,15 @@ func Test_sign_invalid_commands()
   call assert_fails('sign place 1 buffer=', 'E158:')
   call assert_fails('sign define Sign2 text=', 'E239:')
 endfunc
+
+func Test_sign_delete_buffer()
+  new
+  sign define Sign text=x
+  let bufnr = bufnr('%')
+  new
+  exe 'bd ' . bufnr
+  exe 'sign place 61 line=3 name=Sign buffer=' . bufnr
+  call assert_fails('sign jump 61 buffer=' . bufnr, 'E934:')
+  sign unplace 61
+  sign undefine Sign
+endfunc

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2225,
 /**/
     2224,
 /**/