Holding CTRL+G => Fatal error

Holding CTRL+G pressed for a while, 10 seconds maybe, issues a fatal error. Version: Version: 21.4.1-2 (On my debian SID disttribution) Text straight from the console: ISO8:T-----XEmacs: UserObject.h (C)----L22--All------------------------------------------ [1]+ Stopped xemacs UserObject.h pok＠king:~/pok2/src/server/pokt/pokts$ fg xemacs UserObject.h Auto-save? (y or n) y Fatal error: assertion failed, file eval.c, line 3963, !gc_in_progress Fatal error (6).