07858: batman: Use of verbose causes a crash before start

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07858	Crash/Freeze	Minor	Always	28 days ago	27 days ago

Tester	Robbbert	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows 10 (64-bit)
Status [?]	Confirmed			Driver	batman.cpp
Version	0.228	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	07858: batman: Use of verbose causes a crash before start
Description	Use of the verbose switch will cause many games to crash while in the process of starting up.
Steps To Reproduce	With the official build, do >mame64 batman -v It will crash while starting the video device
Additional Information	Tafoid has a list of several hundred other games that have the same issue. I picked batman as it seemed to always happen with the official MAME. This issue does not occur with my homebuilt MAME, possibly because of a different GCC version. (I'm using 10.1)
Github Commit

Flags
Regression Version
Affected Sets / Systems	batman

Attached Files

No.18407 Tafoid Administrator 28 days ago	Some more examples: https://mameload.mameworld.info/verbosecrash.txt https://mameload.mameworld.info/verbosecrash2.txt Similar to what was reported in late 2019 which was suspected to be some compiler bug that was exposed during code changes. https://www.mameworld.info/ubbthreads/showthreaded.php?Cat=&Number=384425
No.18413 cuavas Administrator 27 days ago	I ran gauntlet in a release build under valgrind, and it didn’t turn up any branches on uninitialised values or out-of-bounds accesses (I realise that was on Linux, so different calling convention, object format, etc. but it would still turn up a lot of issues). Given it’s jumping into the weeds from the well-exercised string formatting code, it looks a lot like a compiler bug.