Can't open new window after an OSC 7 with invalid URI

Execute this command:

printf '\e]7;file://525198bb6eda/bin\e\\'; sleep 1000

This sets the OSC 7 (the concept of the current working directory) to an invalid value, and waits so that the next prompt doesn't override it.

Then try to open a new window via the menu or shortcut. No new window opens. (Interestingly, opening a new tab works.)

Probably the same story as https://github.com/gnome-terminator/terminator/issues/966 and https://github.com/gnunn1/tilix/issues/2244, although apparently no crash occurs here. g_filename_from_uri() returns NULL and it's not handled correctly down the line.

(Arguably a hostname beginning with a digit should be accepted, this might a GLib thing, but I guess other more incorrect values might also trigger this bug.)