[Scummvm-tracker] [ScummVM :: Bugs] #12366: segfault during gc in Ultima 6

[ScummVM :: Bugs]

#12366: segfault during gc in Ultima 6
-----------------------------------------+----------------------------
Reporter:  TheCycoONE                    |      Owner:  (none)
    Type:  defect                        |     Status:  new
Priority:  normal                        |  Component:  Engine: Ultima
 Version:                                |   Keywords:
    Game:  Ultima VI: The False Prophet  |
-----------------------------------------+----------------------------
 I've been seeing somewhat frequent crashes in Ultima 6 using a version
 compiled from the master branch on git
 (529fdca7eaccd48be3f2e081164713106c9702b6) that do not 'appear' to be
 related to particular actions.

 I am using archlinuxarm on an aarch64 system, running sway-wm.


 I took a core dump, and included the backtrace below:
 {{{
 Core was generated by `scummvm'.
 Program terminated with signal SIGSEGV, Segmentation fault.
 #0  0x0000aaaab0a6be54 in Ultima::Nuvie::U6LList::start (this=0x7) at
 engines/ultima/nuvie/misc/u6_list.cpp:223
 223             cur = head;
 [Current thread is 1 (Thread 0xffff908d55d0 (LWP 50713))]
 (gdb) bt
 #0  0x0000aaaab0a6be54 in Ultima::Nuvie::U6LList::start() (this=0x7) at
 engines/ultima/nuvie/misc/u6_list.cpp:223
 #1  0x0000aaaab0a1f498 in Ultima::Nuvie::delete_obj(Ultima::Nuvie::Obj*)
 (obj=0xaaaac4e23bf0)
     at engines/ultima/nuvie/core/obj_manager.cpp:2037
 #2  0x0000aaaab0a1f4c8 in Ultima::Nuvie::delete_obj(Ultima::Nuvie::Obj*)
 (obj=0xaaaac4a4a6f0)
     at engines/ultima/nuvie/core/obj_manager.cpp:2041
 #3  0x0000aaaab0a846e4 in Ultima::Nuvie::nscript_obj_gc(lua_State*)
 (L=0xaaaac42d20d0) at engines/ultima/nuvie/script/script.cpp:1779
 #4  0x0000aaaab1529930 in luaD_precall(lua_State*, lua_TValue*, int)
 (L=0xaaaac42d20d0, func=0xaaaac4e23bd0, nresults=0)
     at common/lua/ldo.cpp:344
 #5  0x0000aaaab1529c24 in luaD_call(lua_State*, lua_TValue*, int)
 (L=0xaaaac42d20d0, func=0xaaaac4e23bd0, nResults=0)
     at common/lua/ldo.cpp:401
 #6  0x0000aaaab152c500 in GCTM(lua_State*) (L=0xaaaac42d20d0) at
 common/lua/lgc.cpp:465
 #7  0x0000aaaab152cb3c in singlestep(lua_State*) (L=0xaaaac42d20d0) at
 common/lua/lgc.cpp:592
 #8  0x0000aaaab152cc0c in luaC_step(lua_State*) (L=0xaaaac42d20d0) at
 common/lua/lgc.cpp:615
 #9  0x0000aaaab1523090 in lua_pushcclosure(lua_State*, int
 (*)(lua_State*), int)
     (L=0xaaaac42d20d0, fn=0xaaaab0a7f1e4
 <Ultima::Nuvie::lua_error_handler(lua_State*)>, n=0) at
 common/lua/lapi.cpp:492
 #10 0x0000aaaab0a83290 in Ultima::Nuvie::Script::call_function(char
 const*, int, int, bool)
     (this=0xaaaac472f6f0, func_name=0xaaaab1b8f730 "actor_int_adj",
 num_args=1, num_return=1, print_stacktrace=true)
     at engines/ultima/nuvie/script/script.cpp:1352
 #11 0x0000aaaab0a827c8 in
 Ultima::Nuvie::Script::call_actor_int_adj(Ultima::Nuvie::Actor*)
 (this=0xaaaac472f6f0, actor=0xaaaac4cac820)
     at engines/ultima/nuvie/script/script.cpp:1177
 #12 0x0000aaaab0ab3500 in Ultima::Nuvie::ActorView::display_actor_stats()
 (this=0xaaaac4802400)
     at engines/ultima/nuvie/views/actor_view.cpp:224
 #13 0x0000aaaab0ab2a50 in Ultima::Nuvie::ActorView::Display(bool)
 (this=0xaaaac4802400, full_redraw=false)
     at engines/ultima/nuvie/views/actor_view.cpp:119
 #14 0x0000aaaab0a37ecc in Ultima::Nuvie::GUI::Display()
 (this=0xaaaac441fb40) at engines/ultima/nuvie/gui/gui.cpp:192
 #15 0x0000aaaab0a12314 in Ultima::Nuvie::Game::play()
 (this=0xaaaac3c43df0) at engines/ultima/nuvie/core/game.cpp:654
 #16 0x0000aaaab09f4634 in Ultima::Nuvie::NuvieEngine::run()
 (this=0xaaaac4011160) at engines/ultima/nuvie/nuvie.cpp:179
 #17 0x0000aaaaae6c5c28 in runGame(Plugin const*, OSystem&, Common::String
 const&) (plugin=0xaaaac36e9760, system=..., edebuglevels=...)
     at base/main.cpp:307
 #18 0x0000aaaaae6c6d38 in scummvm_main(int, char const* const*) (argc=1,
 argv=0xffffc5b983d8) at base/main.cpp:594
 #19 0x0000aaaaae6c351c in main(int, char**) (argc=1, argv=0xffffc5b983d8)
 at backends/platform/sdl/posix/posix-main.cpp:45
 }}}
-- 
Ticket URL: <https://bugs.scummvm.org/ticket/12366>
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