Wide Char at Line Wrap

Category: unicode · Tags: Unicode

When a wide character (CJK or emoji) would begin in the last column of the line, it should wrap to the next line rather than being split across the boundary. The last column should be left blank.

How this is tested: Fill line to last column, write a wide character, verify it appears on the next line.

Supported by 3 of 12 backends (25%)

Terminal Applications

Terminal	Version	Support	Notes
iTerm2	3.6.9	? unknown
Ghostty	1.3.1	? unknown
cmux	0.62.2	? unknown
Kitty	0.46.2	? unknown
VS Code	1.112.0	? unknown
Warp	0.2026.03.18.08.24.03	? unknown
Cursor	2.6.21	? unknown
Terminal.app	2.15	? unknown

Headless Backends

Parser correctness only — a ✓ means the parser accepts the sequence.

Backend	Version	Support	Notes
Alacritty	0.26.0	✓ yes
vt100	0.2.1	✓ yes
vterm	0.2.0	✓ yes
WezTerm	0.1.0-fork.5	✗ no	Wide char at end of line not handled correctly in headless mode

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