It ran for hours, then crashed on a DCC send of a photo.

Fault bucket 1891125652279013456, type 1
Event Name: APPCRASH
Response: Not available
Cab Id: 0

Faulting application name: mirc.exe, version: 7.63.0.0, time stamp: 0x5f3a5b91
Faulting module name: ntdll.dll, version: 10.0.18362.815, time stamp: 0x2995af02
Exception code: 0xc0000374
Fault offset: 0x000dfa1d
Faulting process id: 0xa510
Faulting application start time: 0x01d67fc5fba1bb86
Faulting application path: C:\Program Files (x86)\mIRC\mirc.exe
Faulting module path: C:\WINDOWS\SYSTEM32\ntdll.dll
Report Id: 3ea363d5-4456-4cab-8984-a02c35dd56a9
Faulting package full name:
Faulting package-relative application ID: