This happens in the field:

It seems int int CrashReportDatabaseWin::CleanDatabase(time_t lockfile_ttl) isn't checking for failed std::unique_ptr<Metadata> CrashReportDatabaseWin::AcquireMetadata() (which can fail if the metadata_file can't be opened or the following file-lock failed)

https://github.com/getsentry/crashpad/blob/59fc31ce00d245d59cff282f5ee8f0785b710a2c/client/crash_report_database_win.cc#L970-L1001

All other functions acquiring metadata check the return value and exit immediately. This should be upstreamed.