Quick summary

Games fail to launch on macOS (Arm), specifically Demon's Souls [BLES00932] (Have not tested other games, but I could if required).

Details

Demon's Souls [BLES00932] will crash when launching.

The macOS crash reporter says:

Application Specific Information:
BUG IN CLIENT OF LIBMALLOC: memory corruption of free block

I cannot bisect the exact PR that causes this issue, since there have been issues with the CI and not all builds are available.

Build 18115: Working
Build 18144: Broken

Note that the x86 build running through Rosetta doesn't seem to have this issue.

Build with regression

Unknown, but first noticed in v0.0.37-18144-cc3b1163

Attach two log files

DS_crash_18144.log.zip
DS_working_18115.log.gz

Attach capture files for visual issues

No response

System configuration

macOS 26.0 Tahoe
M1 Pro

Other details

The log.gz file for the crashing build kept getting corrupted, so I just zipped the log manually.