using the newest versions of factorio (0.17.49), this mod () and some number of other mods, i just got a crash after many hours of playing a map without problems. i had no radars made yet and thus no radar in my hand. it happened when i had some other item in my hand and pushed the hotkey to pause the game. i even could reproduce it several times after loading the last autosave (do you want/need a copy of it?), grabbing any item and pushing the key to pause.
edit: even without grabbing anything, the crash happens as soon as i load that autosave and push the hotkey.

the factorio-current.log shows nothing special (no error messages or crash report) ... strange ...

The mod Schall Radar Alignment caused a non-recoverable error.
Please report this error to the mod author.
Error while running event SchallRadarAlignment::on_player_changed_position (ID 81)
SchallRadarAlignment/control.lua:262: attempt to index field 'cursor_stack' (a nil value)
stack traceback:
SchallRadarAlignment/control.lua:262: in function 'refresh_radar'
SchallRadarAlignment/control.lua:274: in function <SchallRadarAlignment/control.lua:273>

ps: during the begin of the map i used shift-space without problems, and recently i added a few mods, but no idea why those mods should interfere with this mod or with that hotkey.

Okay, guess the pause screen (of recent version) has done something unexpected...

I can reproduce too. (I just loaded a game. Doing nothing else but pause. Same crash as yours.)
Just tried adding an additional check, and it seems okay.

But before releasing the patch, something I want to ask first:
Did you try to pause the game in previous game versions? Did you have such crash too?

Just released as patch 0.17.1.

just installed and no more crashes on pausing the game. THANKS !

ps: the map isn't very old, maybe a few days only, and i certainly had used pause without problems at first, but i can't give details like the factorio version (maybe half a week = 1 or 2 versions ago)