Race condition in the program during cut / paste

[lazysegtree]

Describe the bug
On a cut and paste operation, there is a race condition that causes the model.copyItems content to reset to old state containing the file that was removed by cut. It causes errors in logs. I think it could lead to some user facing issue as well.

To Reproduce
Steps to reproduce the behavior:

1. Open spf and perform any cut and paste operation
2. Check error logs. You would see error like "Clipboard render function get item state error stat <old_file>: no such file or directory\n"

Expected behavior
Clipboard content should get cleaned. Clipboard render function should not be looking for old file.

Screenshots
If applicable, add screenshots to help explain your problem.

( Modified with more logs )

( Here you can see, that Update() function ends before pasteItems() goroutine that it started is finished )

System information (please complete the following information):

• OS: MacOS
• Version 14
• superfile Version 1.1.7.1

I have tried to do some research on this. Spend around 3-4h+ 😅
The paste goroutine call takes time, and sometimes it happens after Update() has been finished and m with original m.copyItems has been returned to bubbletea. Even if m.copyItems would get clear at the end of pasteItems, the next Update() would use a new m with original m.copyItems.

This is not going to be easy to fix. But I will try to take a stab at this after

[lazysegtree]

Sometime it causes just "x items left ..." to render in the clipboard panel

Logs

2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_4.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/100M_1.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_1.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_10.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_2.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_3.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_4.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/100M_1.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_1.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_10.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_2.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_3.dat: no such file or directory
2025/01/26 01:29:28 Clipboard render function get item state error
2025/01/26 01:29:28 stat /Users/kuknitin/temp/testf/gen1/10K_4.dat: no such file or directory

[lazysegtree]

Also we sometimes have processes stuck in pending. This could also have something to do with race conditions.
This process stuck sometime happens, and I dont know of the deterministic way of reproducing it yet.