08307: spcpokan: [debug] Assertion failed

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08307	Crash/Freeze	Critical (emulator)	Always	Apr 26, 2022, 22:01	Apr 28, 2022, 22:41

Tester	Tafoid	View Status	Public	Platform	MAME (Self-compiled)
Assigned To	R. Belmont	Resolution	Fixed	OS	Windows Vista/7/8 (64-bit)
Status [?]	Resolved			Driver	konami/konmedal68k.cpp
Version	0.242	Fixed in Version	0.244	Build	Debug
		Fixed in Git Commit	082bb57	Github Pull Request #

Summary	08307: spcpokan: [debug] Assertion failed
Description	Assertion failed: index < m_length, file R:/mame/src/emu/devfind.h, line 1073
Steps To Reproduce
Additional Information
Github Commit

Flags	Debug build specific
Regression Version	0.227
Affected Sets / Systems	spcpokan

Attached Files

No.20098 Robbbert Senior Tester Apr 28, 2022, 07:12	At line 123 of konmedal68k.cpp, change offset to offset & 0x1ffffe. It's obvious from the code that bit 0 should never be set, but there's no protection if it is. So, when it = 0x1fffff, it causes a buffer overflow. Perhaps bit 0 is meant to fix the bad gfx in this game. @arbee ? your thoughts?