[BUG] crash during game on save

GZDoom version

4.11.3

Which game are you running with GZDoom?

Doom 2

What Operating System are you using?

Linux x86_64

Please describe your specific OS version

Gentoo

Relevant hardware info

Zen4 7950X, 64GB, Radeon 6700XT

Have you checked that no other similar issue already exists?

[X] I have searched and not found similar issues.

A clear and concise description of what the bug is.

During casual game play with Doom 2 wad and Project Brutality Mod from PB_Staging commit 8814cec4d634e9a0a0833c827c2c95abc4a39cf4, the game SIGABRT on save.

It seems to happen quite randomly, but often enough to annoy me, so I ran gzdoom with debug config under gdb and got the backtrace as seen in the log section.

Steps to reproduce the behaviour.

Explain how to reproduce

Start game and load a save
Play
Save the game "a few times"

Your configuration

https://gist.github.com/shaohme/b308125fa8c0ed5825ae361cbc7dda29

Provide a Log

Picked up a stimpack.
Picked up a stimpack.
+1 Explosive Round
Picked up a stimpack.
Picked up a stimpack.
+1 Explosive Round
Picked up a stimpack.
----------------------------------------
A secret is revealed!
----------------------------------------
----------------------------------------
Press Weapon Special key to swap modes
----------------------------------------
Berserk Pack!
Picked up the Heavy Assault Armor
+6 Explosive Rounds
Soulsphere!
gzdoom: /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/common/objects/dobject.h:254: PClass* DObject::GetClass() const: Assertion `Class != nullptr' failed.

Thread 1 "gzdoom" received signal SIGABRT, Aborted.
0x00007ffff6ec8c9c in ?? () from /usr/lib64/libc.so.6
(gdb) bt full
#0  0x00007ffff6ec8c9c in ?? () from /usr/lib64/libc.so.6
No symbol table info available.
#1  0x00007ffff6e79bd2 in raise () from /usr/lib64/libc.so.6
No symbol table info available.
#2  0x00007ffff6e624ef in abort () from /usr/lib64/libc.so.6
No symbol table info available.
#3  0x00007ffff6e62417 in ?? () from /usr/lib64/libc.so.6
No symbol table info available.
#4  0x00007ffff6e72632 in __assert_fail () from /usr/lib64/libc.so.6
No symbol table info available.
#5  0x00005555555f9675 in DObject::GetClass (this=0x55556338b870) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/common/objects/dobject.h:254
        __PRETTY_FUNCTION__ = "PClass* DObject::GetClass() const"
#6  0x0000555555da16c4 in FSerializer::WriteObjects (this=0x7fffffffb560) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/common/engine/serializer.cpp:612
        obj = 0x55556338b870
        i = 5533
#7  0x0000555555da1dec in FSerializer::GetCompressedOutput (this=0x7fffffffb560) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/common/engine/serializer.cpp:752
        buff = {mSize = 1, mCompressedSize = 8, mMethod = 1459173008, mZipFlags = 21845, mCRC32 = 1446232219, mBuffer = 0x7fffffffb560 " \333nVUU", filename = 0x7fffffffb560 " \333nVUU"}
        compressbuf = 0x5555559f8869 <FSerializer::operator()<DSeqNode*>(char const*, DSeqNode*&)+47> "H\203\304(\303H\203\3548H\211|$\030H\211t$\020H\211T$\bH\211\f$dH\213\004%("
        stream = {next_in = 0x5555611641b0 "\360X\304nUU", avail_in = 1440353170, total_in = 140737488336224, next_out = 0x555556f92220 <level> "", avail_out = 180186, total_out = 93825000965454, msg = 0x1 <error: Cannot access memory at address 0x1>, state = 0x5555611641b0, zalloc = 0x5555611641b0, 
          zfree = 0x8e605453527cee00, opaque = 0x5555611641b0, data_type = 1440351753, adler = 93459949893248, reserved = 140737488336224}
        err = 32767
#8  0x00005555559f7061 in FLevelLocals::SnapshotLevel (this=0x555556f92220 <level>) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/p_saveg.cpp:1093
        arc = {<FSerializer> = {_vptr.FSerializer = 0x5555566edb20 <vtable for FDoomSerializer+16>, w = 0x5555611641b0, r = 0x0, soundNamesAreUnique = true, mErrors = 0, mObjectErrors = 0}, Level = 0x555556f92220 <level>}
#9  0x00005555558dbf8d in G_DoSaveGame (okForQuicksave=true, forceQuicksave=false, filename=..., description=0x55555fa8d9ac "def") at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/g_game.cpp:2335
        savegame_content = {Array = 0x0, Count = 0, Most = 0}
        savegame_filenames = {Array = 0x0, Count = 0, Most = 0}
        buf = "\000\000\000\000UU\000\000i\253\005WUU\000\000\000\202\370VUU\000\000\000\356|RST`\216P\267\377\377\000\000\000\000\206Q\214UUU\000\000 \270\377\377\377\177\000\000\360\232\020hUU\000\000\250\030\371VUU\000\000\251Z\373UUU\000\000\250\030\371VUU\000\000з\377\377\377\177\000\000\360\304\032W"
        savepic = {<FileSys::FileWriter> = {_vptr.FileWriter = 0x55555723102c, File = 0x7ffff6efe359 <clock_gettime+25>, CloseOnDestruct = 208}, mBuffer = {Array = 0x7ffff70d2bb1 <std::chrono::_V2::steady_clock::now()+33> "Hi\004$", Count = 128177, Most = 0}}
        savegameinfo = {_vptr.FSerializer = 0x5555571de800, w = 0x8e605453527cee00, r = 0x7fffffffb680, soundNamesAreUnique = 38, mErrors = 21845, mObjectErrors = -18664}
        savegameglobals = {_vptr.FSerializer = 0x55555705ab39 <doomcom+25>, w = 0x555556f89080 <NetSpecs+480>, r = 0x200000000000000, soundNamesAreUnique = 248, mErrors = 21845, mObjectErrors = 17490}
        ver = -18872
        picdata = 0x555556758cf0 <FString::NullString>
        bufpng = {mSize = 1461452320, mCompressedSize = 21845, mMethod = 30, mZipFlags = 2, mCRC32 = 1459135224, mBuffer = 0x55555705ab39 <doomcom+25> "Fliveupdate", filename = 0x5555571ac4f0 "'"}
        succeeded = false
#10 0x00005555558d79c6 in G_Ticker () at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/g_game.cpp:1158
        i = 8
        oldgamestate = GS_LEVEL
        buf = 21845
        rngsum = 1459124192
#11 0x00005555558c6c57 in TryRunTics () at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/d_net.cpp:1992
        i = 8
        lowtic = 17491
        realtics = 1
        availabletics = 1
        counts = 0
        numplaying = 1
        doWait = false
#12 0x00005555558b3f5a in D_DoomLoop () at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/d_main.cpp:1220
        lasttic = 17490
#13 0x00005555558bbc11 in D_DoomMain_Internal () at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/d_main.cpp:3752
        pwads = std::vector of length 0, capacity 0
        ret = 0
        iwad = {Chars = 0x555556758cfc <FString::NullString+12> "", static NullString = {Len = 0, AllocLen = 2, RefCount = 167155, Nothing = "\000"}}
        allwads = std::vector of length 0, capacity 0
        iwad_info = 0x5555572bbe80
        wad = 0x5555571ac2dc "/home/mkj/gms/doom//opt/gzdoom/lights.pk3"
        iwad_man = 0x0
        batchout = 0x0
        logfile = {Chars = 0x555556758cfc <FString::NullString+12> "", static NullString = {Len = 0, AllocLen = 2, RefCount = 167155, Nothing = "\000"}}
        basewad = {Chars = 0x55555723102c "/usr/share/doom/gzdoom.pk3", static NullString = {Len = 0, AllocLen = 2, RefCount = 167155, Nothing = "\000"}}
        optionalwad = {Chars = 0x5555572312fc "/usr/share/doom/game_support.pk3", static NullString = {Len = 0, AllocLen = 2, RefCount = 167155, Nothing = "\000"}}
#14 0x00005555558bbe4e in GameMain () at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/d_main.cpp:3783
        ret = 0
        cb = {UserInfoChanged = 0x5555558cc8f2 <D_UserInfoChanged(FBaseCVar*)>, SendServerInfoChange = 0x5555558ccca0 <D_SendServerInfoChange(FBaseCVar*, UCVarValue, ECVarType)>, SendServerFlagChange = 0x5555558cce1b <D_SendServerFlagChange(FBaseCVar*, int, bool, bool)>, 
          GetUserCVar = 0x5555558d5c0c <G_GetUserCVar(int, char const*)>, MustLatch = 0x5555558bbdba <_FUN()>}
#15 0x0000555555571e36 in main (argc=5, argv=0x7fffffffcae8) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/common/platform/posix/sdl/i_main.cpp:199
        program = "/usr/bin/\000zdoom\000L\310rC\000\000\000\000\371\231G\200\000\000\000\000\315^\301;\000\000\000\000\245\307e \000\000\000\000b\037)\216\000\000\000\000b\356\254\016\000\000\000\000\026w\324\r\000\000\000\000yo\302\036\000\000\000\000\030\375إ\000\000\000\000.n;\371\000\000\000\000\t\330/A\000\000\000\000\210դh\000\000\000\000\3520\230\373\000\000\000\000\027\227G\251\000\000\000\000\276\263[;\000\000\000\000w\273\b\003\000\000\000\000\021㉲\000\000\000\000\342\377E\355\000\000\000\000\233\302\235\222\000\000\000\000XW|w\000\000\000\000\024+=\243\000\000\000\000\251\355`y\000\000\000\000+S\022\203\000\000\000\000\027\271|c\000"...
        slash = 0x7fffffffb9b8 "/"
        result = 0
(gdb)

This have also been observed on save:

Thread 1 "gzdoom" received signal SIGSEGV, Segmentation fault.
0x0000555555828b53 in FName::GetChars (this=0x1000000041) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/common/utility/name.h:68
(gdb) bt full
#0  0x0000555555828b53 in FName::GetChars (this=0x1000000041) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/common/utility/name.h:68
No locals.
#1  0x0000555555da16d0 in FSerializer::WriteObjects (this=0x7fffffffb560) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/common/engine/serializer.cpp:612
        obj = 0x5555707af900
        i = 6026
#2  0x0000555555da1dec in FSerializer::GetCompressedOutput (this=0x7fffffffb560) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/common/engine/serializer.cpp:752
        buff = {mSize = 1, mCompressedSize = 8, mMethod = 1459173008, mZipFlags = 21845, mCRC32 = 1446232219, mBuffer = 0x7fffffffb560 " \333nVUU", filename = 0x7fffffffb560 " \333nVUU"}
        compressbuf = 0x5555559f8869 <FSerializer::operator()<DSeqNode*>(char const*, DSeqNode*&)+47> "H\203\304(\303H\203\3548H\211|$\030H\211t$\020H\211T$\bH\211\f$dH\213\004%("
        stream = {next_in = 0x55557130c710 "\260\320xjUU", avail_in = 1440353170, total_in = 140737488336224, next_out = 0x555556f92220 <level> "", avail_out = 211261, total_out = 93825000965454, msg = 0x1 <error: Cannot access memory at address 0x1>, state = 0x55557130c710, zalloc = 0x55557130c710, 
          zfree = 0x4826d558b3c85a00, opaque = 0x55557130c710, data_type = 1440351753, adler = 93459949812032, reserved = 140737488336224}
        err = 32767
#3  0x00005555559f7061 in FLevelLocals::SnapshotLevel (this=0x555556f92220 <level>) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/p_saveg.cpp:1093
        arc = {<FSerializer> = {_vptr.FSerializer = 0x5555566edb20 <vtable for FDoomSerializer+16>, w = 0x55557130c710, r = 0x0, soundNamesAreUnique = true, mErrors = 0, mObjectErrors = 0}, Level = 0x555556f92220 <level>}
#4  0x00005555558dbf8d in G_DoSaveGame (okForQuicksave=true, forceQuicksave=false, filename=..., description=0x555569a3296c "def") at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/g_game.cpp:2335
        savegame_content = {Array = 0x0, Count = 0, Most = 0}
        savegame_filenames = {Array = 0x0, Count = 0, Most = 0}
        buf = "\000\000\000\000UU\000\000T\253\005WUU\000\000\000\207\370VUU\000\000\000ZȳX\325&HP\267\377\377\000\000\000\000\206Q\214UUU\000\000 \270\377\377\377\177\000\000PS\020iUU\000\000\250\030\371VUU\000\000\251Z\373UUU\000\000\250\030\371VUU\000\000з\377\377\377\177\000\000п\036W"
        savepic = {<FileSys::FileWriter> = {_vptr.FileWriter = 0x55555723199c, File = 0x7ffff6efe359 <clock_gettime+25>, CloseOnDestruct = false}, mBuffer = {Array = 0x7ffff70d2bb1 <std::chrono::_V2::steady_clock::now()+33> "Hi\004$", Count = 130306, Most = 0}}
        savegameinfo = {_vptr.FSerializer = 0x5555571bdd70, w = 0x4826d558b3c85a00, r = 0x7fffffffb680, soundNamesAreUnique = 38, mErrors = 21845, mObjectErrors = -18664}
        savegameglobals = {_vptr.FSerializer = 0x55555705ab39 <doomcom+25>, w = 0x555556f88fc0 <NetSpecs+288>, r = 0x200000000000000, soundNamesAreUnique = 248, mErrors = 21845, mObjectErrors = 35910}
        ver = 1497965104
        picdata = 0x7ffff7c7ad2f <SDL_PumpEventsInternal+207>
        bufpng = {mSize = 1461356928, mCompressedSize = 21845, mMethod = 18, mZipFlags = 2, mCRC32 = 1459134984, mBuffer = 0x55555705ab39 <doomcom+25> "Fliveupdate", filename = 0x5555571ebfd0 "XsnVUU"}
        succeeded = false
#5  0x00005555558d79c6 in G_Ticker () at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/g_game.cpp:1158
        i = 8
        oldgamestate = GS_LEVEL
        buf = 21845
        rngsum = 1459124192
#6  0x00005555558c6c57 in TryRunTics () at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/d_net.cpp:1992
        i = 8
        lowtic = 35911
        realtics = 1
        availabletics = 1
        counts = 0
        numplaying = 1
        doWait = false
#7  0x00005555558b3f5a in D_DoomLoop () at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/d_main.cpp:1220
        lasttic = 35910
#8  0x00005555558bbc11 in D_DoomMain_Internal () at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/d_main.cpp:3752
        pwads = std::vector of length 0, capacity 0
        ret = 0
        iwad = {Chars = 0x555556758cfc <FString::NullString+12> "", static NullString = {Len = 0, AllocLen = 2, RefCount = 167400, Nothing = "\000"}}
        allwads = std::vector of length 0, capacity 0
        iwad_info = 0x5555572bc5b0
        wad = 0x5555571ac08c "/home/mkj/gms/doom//opt/gzdoom/lights.pk3"
        iwad_man = 0x0
        batchout = 0x0
        logfile = {Chars = 0x555556758cfc <FString::NullString+12> "", static NullString = {Len = 0, AllocLen = 2, RefCount = 167400, Nothing = "\000"}}
        basewad = {Chars = 0x55555723199c "/usr/share/doom/gzdoom.pk3", static NullString = {Len = 0, AllocLen = 2, RefCount = 167400, Nothing = "\000"}}
        optionalwad = {Chars = 0x555557231c6c "/usr/share/doom/game_support.pk3", static NullString = {Len = 0, AllocLen = 2, RefCount = 167400, Nothing = "\000"}}
#9  0x00005555558bbe4e in GameMain () at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/d_main.cpp:3783
        ret = 0
        cb = {UserInfoChanged = 0x5555558cc8f2 <D_UserInfoChanged(FBaseCVar*)>, SendServerInfoChange = 0x5555558ccca0 <D_SendServerInfoChange(FBaseCVar*, UCVarValue, ECVarType)>, SendServerFlagChange = 0x5555558cce1b <D_SendServerFlagChange(FBaseCVar*, int, bool, bool)>, 
          GetUserCVar = 0x5555558d5c0c <G_GetUserCVar(int, char const*)>, MustLatch = 0x5555558bbdba <_FUN()>}
#10 0x0000555555571e36 in main (argc=5, argv=0x7fffffffcae8) at /var/tmp/portage/games-fps/gzdoom-4.11.3-r1/work/gzdoom-g4.11.3/src/common/platform/posix/sdl/i_main.cpp:199
        program = "/usr/bin/\000zdoom\000L\310rC\000\000\000\000\371\231G\200\000\000\000\000\315^\301;\000\000\000\000\245\307e \000\000\000\000b\037)\216\000\000\000\000b\356\254\016\000\000\000\000\026w\324\r\000\000\000\000yo\302\036\000\000\000\000\030\375إ\000\000\000\000.n;\371\000\000\000\000\t\330/A\000\000\000\000\210դh\000\000\000\000\3520\230\373\000\000\000\000\027\227G\251\000\000\000\000\276\263[;\000\000\000\000w\273\b\003\000\000\000\000\021㉲\000\000\000\000\342\377E\355\000\000\000\000\233\302\235\222\000\000\000\000XW|w\000\000\000\000\024+=\243\000\000\000\000\251\355`y\000\000\000\000+S\022\203\000\000\000\000\027\271|c\000"...
        slash = 0x7fffffffb9b8 "/"
        result = 0

Seems to be. The crash is here -

https://github.com/ZDoom/gzdoom/blob/6ce809efe2902e43ceaa7031b875225d3a0367de/src/common/engine/serializer.cpp#L612

which is where the other crash was in the linked report.

@shaohme Would you mind testing again with a build from master?

@madame-rachelle GZDoom g4.12pre-480-g7a43d7f78-m crashed again during saving a game.

You've found the Auto Shotgun! (Slot 3)
You got the UAC Mach-3 Minigun! (Slot 5)
You got the M2 Lightning Mode Upgrade!!
Game saved. (/home/mkj/.config/gzdoom/savegames/doom.id.doom2.commercial/save00.zds)
+10 Low Caliber Rounds
+1 Explosive Round
+4 High Caliber Rounds
+1 Explosive Round
----------------------------------------
A secret is revealed!
----------------------------------------
+60 Low Caliber Rounds
+6 Explosive Rounds
+60 Low Caliber Rounds
[==========================================================================================================================================================..]
Thread 1 "gzdoom" received signal SIGSEGV, Segmentation fault.
0x000055555582d521 in FName::GetChars (this=0x4700000059) at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/common/utility/name.h:68
warning: 68 /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/common/utility/name.h: No such file or directory
(gdb) bt full
#0  0x000055555582d521 in FName::GetChars (this=0x4700000059) at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/common/utility/name.h:68
No locals.
#1  0x0000555555dd57ea in FSerializer::WriteObjects (this=0x7fffffffb4f0) at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/common/engine/serializer.cpp:627
        obj = 0x555574823a80
        i = 4879
#2  0x0000555555dd5f3c in FSerializer::GetCompressedOutput (this=0x7fffffffb4f0) at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/common/engine/serializer.cpp:767
        buff = {mSize = 8, mCompressedSize = 93825021265808, mMethod = 1447035603, mCRC32 = 21845, mBuffer = 0x555555bb60be <StaticClearSerializeTranslationsData()+19> "\220H\203\304\b\303H\203\354H\211|$\fdH\213\004%(", filename = 0x7fffffffb4f0 " \035\204VUU"}
        compressbuf = 0x555555bb980a <TArray<std::pair<FTranslationID, FRemapTable>, std::pair<FTranslationID, FRemapTable> >::Reset()+22> "H\213D$\b\307@\f"
        stream = {next_in = 0x555563ee5b60 "З\305_UU", avail_in = 1440566372, total_in = 140737488336112, next_out = 0x5555570eb5c0 <level> "", avail_out = 278072, total_out = 93825001180062, msg = 0x1 <error: Cannot access memory at address 0x1>, state = 0x555563ee5b60, zalloc = 0x555563ee5b60, 
          zfree = 0xbb321503cd129700, opaque = 0x555563ee5b60, data_type = 1440564955, adler = 93459951244368, reserved = 140737488336112}
        err = 32767
#3  0x0000555555a0461f in FLevelLocals::SnapshotLevel (this=0x5555570eb5c0 <level>) at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/p_saveg.cpp:1108
        arc = {<FSerializer> = {_vptr.FSerializer = 0x555556841d20 <vtable for FDoomSerializer+16>, w = 0x555563ee5b60, r = 0x0, soundNamesAreUnique = true, mErrors = 0, mObjectErrors = 0}, Level = 0x5555570eb5c0 <level>}
#4  0x00005555558e26df in G_DoSaveGame (okForQuicksave=true, forceQuicksave=false, filename=..., description=0x55556739fcbc "def") at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/g_game.cpp:2351
        savegame_content = {Array = 0x0, Count = 0, Most = 0}
        savegame_filenames = {Array = 0x0, Count = 0, Most = 0}
        buf = "\000\000\000\000UU\000\000iA\033WUU\000\000\000\035\016WUU\000\000\000\227\022\315\003\0252\273\340\266\377\377\000\000\000\000\252\250\214UUU\000\000\260\267\377\377\377\177\000\000\000\241]lUU\000\000H\254\016WUU\000\000K\n\000VUU\000\000H\254\016WUU\000\000`\267\377\377\377\177\000\000\200!;W"
        savepic = {<FileSys::FileWriter> = {_vptr.FileWriter = 0x1, File = 0x100000003, CloseOnDestruct = false}, mBuffer = std::vector of length -79345225826305, capacity 18472 = {<error reading variable: Cannot access memory at address 0x482a00000001>
        savegameinfo = {_vptr.FSerializer = 0x5555573b295c, w = 0x7ffff6efe349 <clock_gettime+25>, r = 0x7ffff7ffd000 <_rtld_local>, soundNamesAreUnique = 177, mErrors = 32767, mObjectErrors = 108016}
        savegameglobals = {_vptr.FSerializer = 0x555557337800, w = 0xbb321503cd129700, r = 0x7fffffffb610, soundNamesAreUnique = 154, mErrors = 21845, mObjectErrors = -18776}
        ver = 1466060448
        picdata = 0x7ffff7c7ad2f <SDL_PumpEventsInternal+207>
        bufpng = {mSize = 93825021985081, mCompressedSize = 93825021125456, mMethod = 0, mCRC32 = 33554432, mBuffer = 0x5555558d711a <ReadTicCmd(unsigned char**, int, int)+303> "\203|$\034\001\017\205\202", filename = 0x4829 <error: Cannot access memory at address 0x4829>}
        succeeded = false
#5  0x00005555558de29a in G_Ticker () at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/g_game.cpp:1176
        i = 8
        oldgamestate = GS_LEVEL
        buf = 21845
        rngsum = 1460538304
#6  0x00005555558cc37b in TryRunTics () at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/d_net.cpp:2012
        i = 8
        lowtic = 18474
        realtics = 1
        availabletics = 1
        counts = 0
        numplaying = 1
        doWait = false
#7  0x00005555558b942a in D_DoomLoop () at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/d_main.cpp:1227
        lasttic = 18473
#8  0x00005555558c11cf in D_DoomMain_Internal () at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/d_main.cpp:3771
        pwads = std::vector of length 0, capacity 0
        ret = 0
        iwad = {Chars = 0x5555568b1afc <FString::NullString+12> "", static NullString = {Len = 0, AllocLen = 2, RefCount = 167381, Nothing = "\000"}}
        allwads = std::vector of length 0, capacity 0
        iwad_info = 0x5555579bbd80
        wad = 0x555557308a4c "/home/mkj/gms/doom//opt/gzdoom/lights.pk3"
        iwad_man = 0x0
        batchout = 0x0
        logfile = {Chars = 0x5555568b1afc <FString::NullString+12> "", static NullString = {Len = 0, AllocLen = 2, RefCount = 167381, Nothing = "\000"}}
        basewad = {Chars = 0x5555573b295c "/usr/share/doom/gzdoom.pk3", static NullString = {Len = 0, AllocLen = 2, RefCount = 167381, Nothing = "\000"}}
        optionalwad = {Chars = 0x555557306dec "/usr/share/doom/game_support.pk3", static NullString = {Len = 0, AllocLen = 2, RefCount = 167381, Nothing = "\000"}}
#9  0x00005555558c140c in GameMain () at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/d_main.cpp:3802
        ret = 0
        cb = {UserInfoChanged = 0x5555558d2dc0 <D_UserInfoChanged(FBaseCVar*)>, SendServerInfoChange = 0x5555558d315f <D_SendServerInfoChange(FBaseCVar*, UCVarValue, ECVarType)>, SendServerFlagChange = 0x5555558d32da <D_SendServerFlagChange(FBaseCVar*, int, bool, bool)>, 
          GetUserCVar = 0x5555558dc46e <G_GetUserCVar(int, char const*)>, MustLatch = 0x5555558c1378 <_FUN()>}
#10 0x0000555555574148 in main (argc=5, argv=0x7fffffffca78) at /var/tmp/portage/games-fps/gzdoom-9999/work/gzdoom-9999/src/common/platform/posix/sdl/i_main.cpp:199
        program = "/usr/bin/\000zdoom\000L\310rC\000\000\000\000\371\231G\200\000\000\000\000\315^\301;\000\000\000\000\245\307e \000\000\000\000b\037)\216\000\000\000\000b\356\254\016\000\000\000\000\026w\324\r\000\000\000\000yo\302\036\000\000\000\000\030\375إ\000\000\000\000.n;\371\000\000\000\000\t\330/A\000\000\000\000\210դh\000\000\000\000\3520\230\373\000\000\000\000\027\227G\251\000\000\000\000\276\263[;\000\000\000\000w\273\b\003\000\000\000\000\021㉲\000\000\000\000\342\377E\355\000\000\000\000\233\302\235\222\000\000\000\000XW|w\000\000\000\000\024+=\243\000\000\000\000\251\355`y\000\000\000\000+S\022\203\000\000\000\000\027\271|c\000"...
        slash = 0x7fffffffb948 "/"
        result = 0
(gdb)

ZDoom / gzdoom