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COOKED_READ: Writing more text than fit into the ConPTY viewport behaves weirdly #20425

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opened 2026-01-31 07:13:24 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 07:13:24 +00:00
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Originally created by @lhecker on GitHub (Aug 29, 2023).

Originally assigned to: @lhecker on GitHub.

Steps to reproduce

  • Make Windows Terminal small
  • Launch cmd.exe
  • Write lots of text, more than fit into the viewport

Expected Behavior

No flickering and everything works as if there's infinite scrollback.

Actual Behavior

To bring my feelings across I wrote a haiku:

The window flickering was hell.
The scrolling drained me of life's happiness.
Cooked read drives me nuts.

Originally created by @lhecker on GitHub (Aug 29, 2023). Originally assigned to: @lhecker on GitHub. ### Steps to reproduce * Make Windows Terminal small * Launch `cmd.exe` * Write lots of text, more than fit into the viewport ### Expected Behavior No flickering and everything works as if there's infinite scrollback. ### Actual Behavior To bring my feelings across I wrote a haiku: The window flickering was hell. The scrolling drained me of life's happiness. Cooked read drives me nuts.
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Reference: starred/terminal#20425
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