Terminal prints missing-glyph boxes before the prompt on logout #150

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opened 2026-10-10 09:08:00 +00:00 by kayg · 0 comments

kayg commented

2026-10-10 09:08:00 +00:00

Owner

Owner's production screenshot (Windows Chromium, 2026-10-10): after typing exit or logout in a local terminal on monitor01, the terminal shows

root@monitor01:~#
⍰⍰⍰⍰⍰⍰root@monitor01:~#
    logout

Six missing-glyph boxes are drawn before the prompt, and "logout" appears on the next line, indented.

Questions:

Which bytes reach the renderer here: unhandled escape sequences (bracketed-paste end, OSC, DCS, or C1 controls) printed as text, or characters the font lacks?
Is it the renderer, or the shim's snapshot or replay?

Plan:

Reproduce with a real PTY.
Capture the raw bytes.
Write a failing renderer test.
Fix.

The renderer must never print a control or escape byte as a glyph. A real character that no font covers should fall back to a font that has it, not to a box.

Production web: 0d93a502.

Owner's production screenshot (Windows Chromium, 2026-10-10): after typing `exit` or `logout` in a local terminal on monitor01, the terminal shows ``` root@monitor01:~# ⍰⍰⍰⍰⍰⍰root@monitor01:~# logout ``` Six missing-glyph boxes are drawn before the prompt, and "logout" appears on the next line, indented. Questions: - Which bytes reach the renderer here: unhandled escape sequences (bracketed-paste end, OSC, DCS, or C1 controls) printed as text, or characters the font lacks? - Is it the renderer, or the shim's snapshot or replay? Plan: 1. Reproduce with a real PTY. 2. Capture the raw bytes. 3. Write a failing renderer test. 4. Fix. The renderer must never print a control or escape byte as a glyph. A real character that no font covers should fall back to a font that has it, not to a box. Production web: 0d93a502.

kayg referenced this issue

2026-10-11 06:58:37 +00:00

tmux symbols broken: sessions start without a UTF-8 locale #161

kayg referenced this issue

2026-10-11 10:50:05 +00:00

tmux symbols broken: sessions start without a UTF-8 locale #161

~~kayg referenced this issue 2026-10-28 17:53:56 +00:00~~

Orchestrator handover 2026-10-28: moving to a new machine #254

kayg referenced this issue

2026-10-28 18:00:45 +00:00

Orchestrator handover 2026-10-28: moving to a new machine #254