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COOKED_READ: Writing more text than fit into the ConPTY viewport behaves weirdly #15899

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Description

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.

Activity

  1. added
    Issue-BugIt either shouldn't be doing this or needs an investigation.
    Severity-BlockingWe won't ship a release like this! No-siree.
    Area-CookedReadThe cmd.exe COOKED_READ handling
    on Aug 29, 2023
  2. added
    Needs-Tag-FixDoesn't match tag requirements
    Needs-TriageIt's a new issue that the core contributor team needs to triage at the next triage meeting
    on Aug 29, 2023
  3. removed
    Needs-TriageIt's a new issue that the core contributor team needs to triage at the next triage meeting
    Needs-Tag-FixDoesn't match tag requirements
    on Aug 30, 2023
  4. added a commit that references this issue on Sep 8, 2023
    4ddfc3e
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Area-CookedReadThe cmd.exe COOKED_READ handlingIn-PRThis issue has a related PRIssue-BugIt either shouldn't be doing this or needs an investigation.Needs-Tag-FixDoesn't match tag requirementsPriority-1A description (P1)Product-TerminalThe new Windows Terminal.Severity-BlockingWe won't ship a release like this! No-siree.

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