[BUG] table line missing characters in windows terminal but not cmd

[GSGBen]

Describe the bug

Running python -m rich in the latest windows terminal outputs three ??? characters in the line under the column headings.

To Reproduce

Platform

• Windows 10
• Windows terminal 1.1.2021.0
• Python 3.8.2
• Rich 4.2.0
• Happens with Cascadia, Cascadia Mono, Consolas. Assuming all fonts
• Doesn't happen in cmd/powershell/conemu

[willmcgugan]

This is actually a bug in Python itself https://bugs.python.org/issue37871

A workaround would be to chop Rich output in to parts smaller than the buffer size used by Python.

[willmcgugan]

Fixed in v4.2.1

[GSGBen]

Wow, thanks!

[GSGBen]

Tested in 4.2.1 and it still seems to be occurring:

~> pip list | sls rich

rich               4.2.1

[willmcgugan]

Try 4.2.2

Rich now writes a line at a time, which seems to fix it. I can't reproduce the problem on Windows 10.

[GSGBen]

Tested on the original PC and it still happens, but tested on another Windows 10 one and it doesn't, so I'm chalking it up to an environment issue on this PC. Thanks for your work on this.