Don't dereference Vsystem_type's Lisp_Symbol pointer if it is NULL.

2 files changed, 20 insertions, 12 deletions

diff --git a/src/.gdbinit b/src/.gdbinit
index 99dcbae7936..59d1b7a59f2 100644
--- a/src/.gdbinit
+++ b/src/.gdbinit
@@ -766,18 +766,21 @@ set args -geometry 80x40+0+0
 
 # People get bothered when they see messages about non-existent functions...
 xgetptr Vsystem_type
-set $tem = (struct Lisp_Symbol *) $ptr
-xgetptr $tem->xname
-set $tem = (struct Lisp_String *) $ptr
-set $tem = (char *) $tem->data
-
-# Don't let abort actually run, as it will make stdio stop working and
-# therefore the `pr' command above as well.
-if $tem[0] == 'w' && $tem[1] == 'i' && $tem[2] == 'n' && $tem[3] == 'd'
-  # The windows-nt build replaces abort with its own function.
-  break w32_abort
-else
-  break abort
+# $ptr is NULL in temacs
+if ($ptr != 0)
+  set $tem = (struct Lisp_Symbol *) $ptr
+  xgetptr $tem->xname
+  set $tem = (struct Lisp_String *) $ptr
+  set $tem = (char *) $tem->data
+
+  # Don't let abort actually run, as it will make stdio stop working and
+  # therefore the `pr' command above as well.
+  if $tem[0] == 'w' && $tem[1] == 'i' && $tem[2] == 'n' && $tem[3] == 'd'
+    # The windows-nt build replaces abort with its own function.
+    break w32_abort
+  else
+    break abort
+  end
 end
 
 # x_error_quitter is defined only on X.  But window-system is set up
diff --git a/src/ChangeLog b/src/ChangeLog
index 276ee336537..b7f76bb6365 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2006-01-20  Eli Zaretskii  <eliz@gnu.org>
+
+        * .gdbinit: Don't dereference Vsystem_type's Lisp_Symbol pointer
+        if it is NULL.
+
 2006-01-20  Kenichi Handa  <handa@m17n.org>
 
         * puresize.h (BASE_PURESIZE): Increment to 1190000.