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UTF-8 line-drawing characters do not render correctly in Terminal vs. console #3127

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opened 2026-01-30 23:13:43 +00:00 by claunia · 0 comments
claunia commented 2026-01-30 23:13:43 +00:00
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Originally created by @cerebrate on GitHub (Aug 5, 2019).

(This may well be a duplicate, but I didn't find a specific duplicate and I'm not clueful enough to figure out if it's included in any of the others.)

Environment

Windows build number: 10.0.18945.1001
Windows Terminal version (if applicable): 0.3.2142.0

Any other software?

Reproduced using Debian Buster; also, font in use in both Terminal and console is Consolas.

Steps to reproduce

  1. Ensure that you are configured to use the UTF-8 locale and UTF-8 codeset; i.e., that the output of the locale command is as follows:
LANG=en_US.UTF-8                                                                                                                                            LANGUAGE=en_US.UTF-8                                                                                                                                        LC_CTYPE="en_US.UTF-8"                                                                                                                                      LC_NUMERIC="en_US.UTF-8"                                                                                                                                    LC_TIME="en_US.UTF-8"                                                                                                                                       LC_COLLATE="en_US.UTF-8"                                                                                                                                    LC_MONETARY="en_US.UTF-8"                                                                                                                                   LC_MESSAGES="en_US.UTF-8"                                                                                                                                   LC_PAPER="en_US.UTF-8"                                                                                                                                      LC_NAME="en_US.UTF-8"                                                                                                                                       LC_ADDRESS="en_US.UTF-8"                                                                                                                                    LC_TELEPHONE="en_US.UTF-8"                                                                                                                                  LC_MEASUREMENT="en_US.UTF-8"                                                                                                                                LC_IDENTIFICATION="en_US.UTF-8"                                                                                                                             LC_ALL=en_US.UTF-8
  1. Run pstree, or another command which detects and uses UTF-8 line-drawing characters.

Note that this is not the default configuration of Debian for the en_US.UTF-8 locale, which leaves LC_ALL set to C; sudo update-locale LC_ALL=en_US.UTF-8 is required.

Expected behavior

Actual behavior

Expected behavior is line-drawing characters, as seen in console on the right. Actual behavior is all such characters rendering as "underline", as seen in Terminal on the left.

bad-linedrawing

Originally created by @cerebrate on GitHub (Aug 5, 2019). (This may well be a duplicate, but I didn't find a specific duplicate and I'm not clueful enough to figure out if it's included in any of the others.) # Environment ```none Windows build number: 10.0.18945.1001 Windows Terminal version (if applicable): 0.3.2142.0 Any other software? Reproduced using Debian Buster; also, font in use in both Terminal and console is Consolas. ``` # Steps to reproduce 1. Ensure that you are configured to use the UTF-8 locale and UTF-8 codeset; i.e., that the output of the `locale` command is as follows: ``` LANG=en_US.UTF-8 LANGUAGE=en_US.UTF-8 LC_CTYPE="en_US.UTF-8" LC_NUMERIC="en_US.UTF-8" LC_TIME="en_US.UTF-8" LC_COLLATE="en_US.UTF-8" LC_MONETARY="en_US.UTF-8" LC_MESSAGES="en_US.UTF-8" LC_PAPER="en_US.UTF-8" LC_NAME="en_US.UTF-8" LC_ADDRESS="en_US.UTF-8" LC_TELEPHONE="en_US.UTF-8" LC_MEASUREMENT="en_US.UTF-8" LC_IDENTIFICATION="en_US.UTF-8" LC_ALL=en_US.UTF-8 ``` 2. Run `pstree`, or another command which detects and uses UTF-8 line-drawing characters. Note that this is not the default configuration of Debian for the en_US.UTF-8 locale, which leaves LC_ALL set to C; `sudo update-locale LC_ALL=en_US.UTF-8` is required. # Expected behavior # Actual behavior Expected behavior is line-drawing characters, as seen in console on the right. Actual behavior is all such characters rendering as "underline", as seen in Terminal on the left. ![bad-linedrawing](https://user-images.githubusercontent.com/371623/62431251-72235a00-b6eb-11e9-9d7f-77682dbd8fcb.jpg)
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Reference: starred/terminal#3127
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