Escape Characters not Rendered

[davidribyrne]

Windows Terminal version

1.13.10395.0

Windows build number

10.0.19044.1526

Other Software

No response

Steps to reproduce

Run echo -e "\x01\x1b[1;39m\x02test\x01\x1b[0m\x02"

Expected Behavior

It should display "test" with formatting.

Actual Behavior

Windows Terminal displays placeholder boxes instead of \x01 and \x02. I'm not sure what those escape codes are for, but they display correctly in Cygwin's mintty terminal and default terminals on Mac & Linux.

[davidribyrne]

The escape codes are not common. I only stumbled across them recently with bluetoothctl.

[DHowett]

What do they display as in those applications?

DDG officially reports that they have no visual representation

U+0001 , decimal: 1, HTML: No visual representation, UTF-8: 0x01, block: Basic Latin
U+0002 , decimal: 2, HTML: No visual representation, UTF-8: 0x02, block: Basic Latin

As SOH (start of heading) and STX (start of text), they have no defined meaning to a terminal emulator.

Based on the way they're wrapping other control sequences, it looks like they are being used to suppress those sequences from being counted as visible text. If they're making it out to the screen, that suggests that some intermediate application is not properly stripping them out.

[davidribyrne]

I did more experimenting and you're correct, they do not affect the format. The other terminal emulators appear to just ignore them.

[j4james]

FYI, we've discussed these controls before in #10786.

[zadjii-msft]

Yea, this looks like /dup #10786 to me.

[ghost]

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!