08620: UI: Mame crashes after inserting a romfile via File Manager, and then select View External DAT View

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08620	Crash/Freeze	Critical (emulator)	Always	May 1, 2023, 08:12	May 9, 2023, 14:31

Tester	memo0304	View Status	Public	Platform	MAME (Official Binary)
Assigned To	cuavas	Resolution	Fixed	OS	Windows 10/11 (64-bit)
Status [?]	Resolved			Driver
Version	0.254	Fixed in Version	0.255	Build	64-bit
		Fixed in Git Commit	2c0c125	Github Pull Request #

Summary	08620: UI: Mame crashes after inserting a romfile via File Manager, and then select View External DAT View
Description	Any system: When having inserted an external rom via the File Manager, any time afterwards, when you select View External DAT View, MAME freezes and crashes. I have chosen a VIC20 system in this example, but ANY emulated system will produce a similar crash when inserting a new rom with File Manager, and then select View External DAT View from the MAME menu.
Steps To Reproduce	Example: MAME vic20 Go to File Manager Insert any external new progran rom or tape (for example a tape F:\MAME\Roms (added)\VIC20\TAP\Monster Maze (1981)(Creative).zip from the TOSEC collection) (included in this report) Then: select View external DAT View. MAME crashes.
Additional Information	----------------------------------------------------- Exception at EIP=00007ff7d752c82c (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_assign(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)+0x001c): ACCESS VIOLATION While attempting to read memory at 0000000000000010 ----------------------------------------------------- RAX=0000000000000000 RBX=00000286f3215500 RCX=00000286f3215500 RDX=0000000000000008 RSI=0000000000000008 RDI=00007ff7e0f9f870 RBP=00000286f3215510 RSP=000000daaf0f93b0 R8=000000000000000f R9=00000286c7bd8c90 R10=e462687564633131 R11=8101010101010100 R12=00000286f3215510 R13=00000286c7bd8ba8 R14=0000000000000000 R15=00000286f3215540 ----------------------------------------------------- Stack crawl: 000000daaf0f9400: 00007ff7d752c82c (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_assign(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)+0x001c) 000000daaf0f9570: 00007ff7df626efb (luaopen_lfs+0x8a5e7b) 000000daaf0f95e0: 00007ff7df619e3d (luaopen_lfs+0x898dbd) 000000daaf0f9700: 00007ff7df0b6c9a (luaopen_lfs+0x335c1a) 000000daaf0f9760: 00007ff7df0b7074 (luaopen_lfs+0x335ff4) 000000daaf0f9880: 00007ff7de99bea9 (mame_ui_manager::update_and_render(render_container&)+0x0189) 000000daaf0f98b0: 00007ff7dac35d8c (emulator_info::draw_user_interface(running_machine&)+0x001c) 000000daaf0f9940: 00007ff7dad2bf1e (video_manager::frame_update(bool)+0x021e) 000000daaf0f99b0: 00007ff7d76c13b3 (screen_device::vblank_begin(int)+0x0233) 000000daaf0f9a20: 00007ff7d76e90fb (device_scheduler::timeslice()+0x014b) 000000daaf0f9b80: 00007ff7d76e625f (running_machine::run(bool)+0x01bf) 000000daaf0ff0a0: 00007ff7dac3b6bb (mame_machine_manager::execute()+0x020b) 000000daaf0ff480: 00007ff7de9d290f (cli_frontend::start_execution(mame_machine_manager*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)+0x03cf) 000000daaf0ff740: 00007ff7de9d2f1d (cli_frontend::execute(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&)+0x004d) 000000daaf0ff7a0: 00007ff7dac35d39 (emulator_info::start_frontend(emu_options&, osd_interface&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&)+0x0029) 000000daaf0ffb60: 00007ff7dfc21b73 (luaopen_lfs+0xea0af3) 000000daaf0ffc30: 00007ff7d2d713b1 (__tmainCRTStartup+0x0231) 000000daaf0ffc60: 00007ff7d2d714e6 (mainCRTStartup+0x0016) 000000daaf0ffc90: 00007ff8c74626ad (BaseThreadInitThunk+0x001d) 000000daaf0ffd10: 00007ff8c814a9f8 (RtlUserThreadStart+0x0028)
Github Commit

Flags
Regression Version
Affected Sets / Systems	UI

Attached Files

No.21382 Fujix Administrator May 2, 2023, 07:03 edited on: May 3, 2023, 01:47	I don't have the crash after inserting monstrmz via the file manager in vic20. Possilbly your dat file may have a problem. AND PLEASE DON'T UPLOAD ANY ROM HERE.
No.21384 Robbbert Senior Tester May 2, 2023, 07:09 edited on: May 2, 2023, 07:10	Confirmed. I tried super80, then used the File Manager to load a loose file that doesn't do anything. Then I pressed Esc to return to the Tab menu, and selected External DAT View. It crashed as described.