08119: Lua console: tab completion causing segmentation fault

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08119	Interface	Critical (emulator)	Always	Oct 28, 2021, 01:47	Oct 30, 2021, 21:18

Tester	kmg	View Status	Public	Platform	MAME (Self-compiled)
Assigned To	crazyc	Resolution	Fixed	OS	MacOS X
Status [?]	Resolved			Driver
Version	0.237	Fixed in Version	0.238	Build	64-bit
		Fixed in Git Commit	cee44b0	Github Pull Request #

Summary	08119: Lua console: tab completion causing segmentation fault
Description	Tab completion causes segmentation fault when used in conjunction with associative array "key" accessing. This seems to be general but see below for a specific example.
Steps To Reproduce	Run anything: mame pacman -w -console In console type: manager.machine.devices[":maincpu"]. (note you need at least the trailing dot) Then: hit tab
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	Lua console

Attached Files

No.19397 ozfalcon Tester Oct 30, 2021, 09:06	This seems to be present back to Mame 0.228 Mame 0.227 doesn't seem to show this behaviour.
No.19400 Tafoid Administrator Oct 30, 2021, 11:46	Can't seem to duplicate this in Windows. Can anyone else?
No.19401 hap Developer Oct 30, 2021, 12:40	Crashes here on Windows 10, both 0.237 and local build.
No.19403 Robbbert Senior Tester Oct 30, 2021, 13:40	Tried on official release and local git, no crash. The large list of choices has many things starting with sol. and ending with corrupted characters though.
No.19404 cuavas Administrator Oct 30, 2021, 13:47	It’s probably because whatever does the tab completion (something in linenoise?) is expecting the thing to be a Lua table when it’s actually a bridged object from sol3.