The error message is gold to get when it comes to debugging. But it would be even better to get the console output (all that is from show_debug_message). So would it be possible in a future version, add something like catch_error_add_debug_message(message). That is saved along with the error message if the game crash. These logs would provide some additional data that lead up to the crash.

Wouldn't this achieve the same effect as writing the message into a text file and then checking for that if the error-dump file exists?

Tested that some time ago and the game becomes very slow and get lag spikes, because of all the open and close file operations. But I can test it again and see it it was just a glitch or something. It can be done with a timer that only save it every few seconds, but then you lose the last second of log data if it crash.