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Ticket UUID:	5773c78e86a515f9c981e990d1ec51d119f1024
Title:	Small lrange of abstract list shimmers the source list to a non-abstract list
Type:	Bug	Version:	9.1a1
Submitter:	apnadkarni	Created on:	2025-06-06 14:38:13
Subsystem:	- New Builtin Commands	Assigned To:	apnadkarni
Priority:	5 Medium	Severity:	Minor
Status:	Closed	Last Modified:	2025-08-16 06:09:26
Resolution:	Fixed	Closed By:	apnadkarni
		Closed on:	2025-08-16 06:09:26
Description:	In the example below, there is no reason for the source type to be shimmered. It will result in functional correctness but memory bloat if the source list is large. `% set l [lrepeat 120 x]; 'rep $l value is a repeatedList with a refcount of 3, object pointer at 0x1c6cb436830, internal representation 0x1c6cb40b1c0:0x78, no string representation % lrange $l 1 10 x x x x x x x x x x % 'rep $l value is a list with a refcount of 3, object pointer at 0x1c6cb436830, internal representation 0x1c6ccc9f8a0:0x0, no string representation`
User Comments:	apnadkarni added on 2025-08-16 06:09:26: Fixed with TIP 649 merge. apnadkarni added on 2025-06-09 13:47:14: This is fixed in the tip-649 branch. If that TIP does not pass, this is a reminder to cherrypick the fix.