Problem

The PROCESSOR_ARCHITECTURE enum in minidump/streams/SystemInfoStream.py defines:

AARCH64 = 0x8003 #ARM64

This value is incorrect. Windows reports ARM64 processor architecture as 12, not 0x8003. As a result, parsing any minidump captured on a Windows-on-ARM system (e.g. Windows 11 ARM64, including under emulation via QEMU/UTM on Apple Silicon) fails with:

ValueError: 12 is not a valid PROCESSOR_ARCHITECTURE

This happens during MINIDUMP_SYSTEM_INFO.parse(), before any actual thread/module/memory data can be read — so the entire dump becomes unparseable, not just the sysinfo section.

Fix

One-line change:

AARCH64 = 12 #ARM64

References

Win32_Processor class — Architecture property, Microsoft Learn — confirms ARM64 = 12.

Testing

Reproduced and fixed against a real minidump captured from a deadlocked Java process running inside a Windows 11 ARM64 VM (QEMU/UTM on Apple Silicon). Before the fix: minidump --all raised ValueError immediately. After the fix: parses successfully, including --sysinfo, --threads, and --all.