Incorrect coloring on built-in terminal

[pta2002]

• nvim --version: NVIM v0.5.0-712-g4a996bc43
• vim -u DEFAULTS (version: ) behaves differently? No
• Operating system/version: Fedora 33
• Terminal name/version: Happened in every terminal I tested (gnome-terminal and kitty)
• $TERM: xterm-256color

Steps to reproduce using nvim -u NORC

nvim -u NORC
:terminal
cd (some project built with rust's rocket)
cargo run

Actual behaviour

The coloring on "Mounting /auth:" is offset, compared to here.

Expected behaviour

The bare terminal displays correctly.

Note I have only experienced this with this particular output, but it will probably happen elsewhere too.

[ThomasFeher]

Could this be a duplicate of #10836? I.e., does setting environment variable
COLORTERM='truecolor' manually fix it?

[pta2002]

I set the environment variable inside :terminal and ran the cargo command, and this still happens.

[erw7]

@pta2002 #13041 will solve your problem? In my environment, depending on the presence or absence of #13041, this is what happens.

nvim -u NORC
:set ambiwidth=double
:terminal
i
printf "○\x1b[36m012345\x1b[30m\x1b[42mabcdef\x1b[m"

#13041 applied.

#13041 Not applicable.

[pta2002]

I can confirm that this fixed the issue!