<URL: http://bugs.freeciv.org/Ticket/Display.html?id=39858 >
> [guest - Mon Nov 12 11:35:46 2007]:
>
> If I middle click for terrain info on unexplored territory it causes a
crash
>
(gdb) bt
#0 0x080f4ecd in terrain_name_translation (pterrain=0x0) at terrain.c:131
#1 0x080f6a1c in tile_get_info_text (ptile=0x98da858) at tile.c:460
#2 0x08079376 in popup_info_text (ptile=0x98da858) at text.c:101
#3 0x08120cc0 in popup_terrain_info_dialog (pDest=0x0, ptile=0x98da858)
at dialogs.c:851
#4 0x081210e2 in terrain_info_callback (pWidget=0x9272c60) at dialogs.c:950
#5 0x0816e020 in widget_pressed_action (pWidget=0x9272c60) at widget.c:402
#6 0x081387e1 in main_mouse_button_down_handler (pButtonEvent=0x8298d9c,
pData=0x0) at gui_main.c:331
#7 0x081392b8 in gui_event_loop (pData=0x0, loop_action=0,
key_down_handler=0x813851f <main_key_down_handler>,
key_up_handler=0x8138785 <main_key_up_handler>,
mouse_button_down_handler=0x81387a0 <main_mouse_button_down_handler>,
mouse_button_up_handler=0x8138856 <main_mouse_button_up_handler>,
mouse_motion_handler=0x81388c7 <main_mouse_motion_handler>)
at gui_main.c:700
#8 0x0813996e in ui_main (argc=1, argv=0xbfb389d4) at gui_main.c:1000
#9 0x08050945 in main (argc=1, argv=0xbfb389d4) at civclient.c:380
The error is IMO in tile.c which crashes if given a NULL terrain.
Attached patch should fix it, probably for all branches but definitely 2.1.
-jason
Index: common/terrain.c
===================================================================
--- common/terrain.c (revision 13944)
+++ common/terrain.c (working copy)
@@ -128,7 +128,9 @@
****************************************************************************/
const char *terrain_name_translation(struct terrain *pterrain)
{
- SANITY_CHECK_TERRAIN(pterrain);
+ if (!pterrain) {
+ return _("Unknown");
+ }
if (NULL == pterrain->name.translated) {
/* delayed (unified) translation */
pterrain->name.translated = ('\0' == pterrain->name.vernacular[0])
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