Description
Bug report
Bug description:
This is a description of a few bugs related to paste mode in the new REPL.
Blank lines
I tried copy-pasting the first 604 lines of this copy of Frankenstein (about 32,000 characters).
After pasting, when I scroll up in my terminal I see 1 additional line above the currently visible lines (the 61 last lines) and then I see 543 blank lines. It seems that the first 543/604 lines show up as blank and the last 61 lines do not.
>>> f = """
[539 more blank lines]
... appreciate the extraordinary merits of this wonderful man. Sometimes I
... have endeavoured to discover what quality it is which he possesses that
[57 more lines of text]
... embraced the gallant vessel on its course and wrecked it--thus!
... """
>>>I assume this behavior may have been for the purpose of enhancing performance.
Pasting this text only took about 1 second, which is much faster than a couple weeks ago) but still slower than the old REPL.
I have not yet attempted to reproduce the blank line issue before #119341 was merged to see if it was the cause.
Paste performance and Ctrl+C
When pasting the full 7,652 line (441,033 character) text of Frankenstein takes about 21 seconds.
That's again, considerably faster than it would have been a couple weeks ago, though it does still takes a bit of time.
The most concerning part about the slow pasting is that the terminal is entirely locked during pasting.
Hitting Ctrl+C does not stop pasting and the arrow keys don't work.
CPython versions tested on:
3.13
Operating systems tested on:
Linux