fonsinchen opened the ticket and wrote:

I just caught this assertion when opening the AI debug window in multiplayer on the server when no AI is present. There have been AIs before that have been bought by human-controlled companies. I'm trying to produce a save game, but it seems there are further preconditions I haven't found yet.

openttd: /home/alve/projekte/openttd/src/ai/ai_gui.cpp:723: virtual void AIDebugWindow::OnPaint(): Assertion `info != __null' failed.

Program received signal SIGABRT, Aborted.
0x00007f081bd7ded5 in raise () from /lib/libc.so.6
(gdb) bt
# 0 0x00007f081bd7ded5 in raise () from /lib/libc.so.6
# 1 0x00007f081bd7f3f3 in abort () from /lib/libc.so.6
# 2 0x00007f081bd76dc9 in __assert_fail () from /lib/libc.so.6
# 3 0x0000000000443446 in AIDebugWindow::OnPaint (this=0x7f080400a220) at /home/alve/projekte/openttd/src/ai/ai_gui.cpp:723
# 4 0x00000000006e0937 in DrawOverlappedWindow (w=0x7f080400a220, left=0, top=24, right=320, bottom=488) at /home/alve/projekte/openttd/src/window.cpp:516
# 5 0x00000000006e09cf in DrawOverlappedWindowForAll (left=0, top=24, right=320, bottom=488) at /home/alve/projekte/openttd/src/window.cpp:539
# 6 0x000000000051beaf in RedrawScreenRect (left=0, top=24, right=320, bottom=488) at /home/alve/projekte/openttd/src/gfx.cpp:1269
# 7 0x000000000051c144 in DrawDirtyBlocks () at /home/alve/projekte/openttd/src/gfx.cpp:1355
# 8 0x00000000006e23e4 in UpdateWindows () at /home/alve/projekte/openttd/src/window.cpp:2304
# 9 0x00000000006c44e4 in VideoDriver_SDL::MainLoop (this=0x2409470) at /home/alve/projekte/openttd/src/video/sdl_v.cpp:501
# 10 0x00000000005c97f4 in ttd_main (argc=1, argv=0x7fff26989ff8) at /home/alve/projekte/openttd/src/openttd.cpp:702
# 11 0x00000000006ae666 in main (argc=1, argv=0x7fff26989ff8) at /home/alve/projekte/openttd/src/unix.cpp:251
(gdb) up
# 1 0x00007f081bd7f3f3 in abort () from /lib/libc.so.6
(gdb)
# 2 0x00007f081bd76dc9 in __assert_fail () from /lib/libc.so.6
(gdb)
# 3 0x0000000000443446 in AIDebugWindow::OnPaint (this=0x7f080400a220) at /home/alve/projekte/openttd/src/ai/ai_gui.cpp:723
723 assert(info != NULL);
(gdb) l
718 DrawCompanyIcon(i, this->widget[AID_WIDGET_COMPANY_BUTTON_START + i].left + 13 + offset, this->widget[AID_WIDGET_COMPANY_BUTTON_START + i].top + 2 + offset);
719 }
720
721 /* Draw the AI name */
722 AIInfo *info = Company::Get(ai_debug_company)->ai_info;
723 assert(info != NULL);
724 char name[1024];
725 snprintf(name, sizeof(name), "%s (v%d)", info->GetName(), info->GetVersion());
726 DrawString(this->widget[AID_WIDGET_NAME_TEXT].left + 7, this->widget[AID_WIDGET_NAME_TEXT].right - 7, 47, name, TC_BLACK, SA_CENTER);

Reported version: 0.7.0
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/2962