Add Bug#.

[gnu-emacs] / src / eval.c

diff --git a/src/eval.c b/src/eval.c
index bcb77574fee510fd71cb2bb7380ff2aa09ee4846..f2407cede31549a6238286f6ca3b14691a525969 100644 (file)
--- a/src/eval.c
+++ b/src/eval.c
@@ -1358,8 +1358,12 @@ A handler is applicable to an error
 if CONDITION-NAME is one of the error's condition names.
 If an error happens, the first applicable handler is run.
 
-The car of a handler may be a list of condition names
-instead of a single condition name.  Then it handles all of them.
+The car of a handler may be a list of condition names instead of a
+single condition name; then it handles all of them.  If the special
+condition name `debug' is present in this list, it allows another
+condition in the list to run the debugger if `debug-on-error' and the
+other usual mechanisms says it should (otherwise, `condition-case'
+suppresses the debugger).
 
 When a handler handles an error, control returns to the `condition-case'
 and it executes the handler's BODY...
@@ -1462,13 +1466,6 @@ internal_condition_case (Lisp_Object (*bfun) (void), Lisp_Object handlers,
   struct catchtag c;
   struct handler h;
 
-  /* Since Fsignal will close off all calls to x_catch_errors,
-     we will get the wrong results if some are not closed now.  */
-#if HAVE_X_WINDOWS
-  if (x_catching_errors ())
-    abort ();
-#endif
-
   c.tag = Qnil;
   c.val = Qnil;
   c.backlist = backtrace_list;
@@ -1507,13 +1504,6 @@ internal_condition_case_1 (Lisp_Object (*bfun) (Lisp_Object), Lisp_Object arg,
   struct catchtag c;
   struct handler h;
 
-  /* Since Fsignal will close off all calls to x_catch_errors,
-     we will get the wrong results if some are not closed now.  */
-#if HAVE_X_WINDOWS
-  if (x_catching_errors ())
-    abort ();
-#endif
-
   c.tag = Qnil;
   c.val = Qnil;
   c.backlist = backtrace_list;
@@ -1556,13 +1546,6 @@ internal_condition_case_2 (Lisp_Object (*bfun) (Lisp_Object, Lisp_Object),
   struct catchtag c;
   struct handler h;
 
-  /* Since Fsignal will close off all calls to x_catch_errors,
-     we will get the wrong results if some are not closed now.  */
-#if HAVE_X_WINDOWS
-  if (x_catching_errors ())
-    abort ();
-#endif
-
   c.tag = Qnil;
   c.val = Qnil;
   c.backlist = backtrace_list;
@@ -1605,13 +1588,6 @@ internal_condition_case_n (Lisp_Object (*bfun) (ptrdiff_t, Lisp_Object *),
   struct catchtag c;
   struct handler h;
 
-  /* Since Fsignal will close off all calls to x_catch_errors,
-     we will get the wrong results if some are not closed now.  */
-#if HAVE_X_WINDOWS
-  if (x_catching_errors ())
-    abort ();
-#endif
-
   c.tag = Qnil;
   c.val = Qnil;
   c.backlist = backtrace_list;
@@ -1728,6 +1704,10 @@ See also the function `condition-case'.  */)
       && (!NILP (Vdebug_on_signal)
          /* If no handler is present now, try to run the debugger.  */
          || NILP (clause)
+         /* A `debug' symbol in the handler list disables the normal
+            suppression of the debugger.  */
+         || (CONSP (clause) && CONSP (XCAR (clause))
+             && !NILP (Fmemq (Qdebug, XCAR (clause))))
          /* Special handler that means "print a message and run debugger
             if requested".  */
          || EQ (h->handler, Qerror)))
@@ -1971,35 +1951,11 @@ verror (const char *m, va_list ap)
   char buf[4000];
   ptrdiff_t size = sizeof buf;
   ptrdiff_t size_max = STRING_BYTES_BOUND + 1;
-  char const *m_end = m + strlen (m);
   char *buffer = buf;
   ptrdiff_t used;
   Lisp_Object string;
 
-  while (1)
-    {
-      va_list ap_copy;
-      va_copy (ap_copy, ap);
-      used = doprnt (buffer, size, m, m_end, ap_copy);
-      va_end (ap_copy);
-
-      /* Note: the -1 below is because `doprnt' returns the number of bytes
-        excluding the terminating null byte, and it always terminates with a
-        null byte, even when producing a truncated message.  */
-      if (used < size - 1)
-       break;
-      if (size <= size_max / 2)
-       size *= 2;
-      else if (size < size_max)
-       size = size_max;
-      else
-       break;  /* and leave the message truncated */
-
-      if (buffer != buf)
-       xfree (buffer);
-      buffer = (char *) xmalloc (size);
-    }
-
+  used = evxprintf (&buffer, &size, buf, size_max, m, ap);
   string = make_string (buffer, used);
   if (buffer != buf)
     xfree (buffer);
@@ -3288,8 +3244,7 @@ grow_specpdl (void)
        signal_error ("Variable binding depth exceeds max-specpdl-size", Qnil);
     }
   size = specpdl_size < max_size / 2 ? 2 * specpdl_size : max_size;
-  specpdl = ((struct specbinding *)
-            xrealloc (specpdl, size * sizeof (struct specbinding)));
+  specpdl = xnrealloc (specpdl, size, sizeof *specpdl);
   specpdl_size = size;
   specpdl_ptr = specpdl + count;
 }