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fix: initialize pseudo console with default size for SSH sessions [2.27]#20490

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deansheather merged 1 commit intorelease/2.27fromdean/backport-win-pty-fix-2.27

Oct 28, 2025

Merged

fix: initialize pseudo console with default size for SSH sessions [2.27]#20490

deansheather merged 1 commit intorelease/2.27fromdean/backport-win-pty-fix-2.27

Oct 28, 2025

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deansheather commentedOct 27, 2025

Resolved an invalid parameter error (-2147024809) during PTY creation on Windows 11 22H2 (but not only) when connecting via JetBrains Toolbox which spawns the native SSH client with-tt forcing PTY allocation even though there is no "terminal" on the client side to query its size.
CreatePseudoConsole doesn't accept a 0x0 (zero width and zero height) console size and unfortunately, there is NO explicit documentation in the official Microsoft documentation that states the minimum valid values or explicitly prohibits 0x0.
Looking at real-world implementations in the search results, all examples use reasonable non-zero values.
I tested this with a local Windows VM registered to dev.coder.com i.e. externally managed workspace.

Relates to#20468

fix: initialize pseudo console with default size for SSH sessions (#2…

a47c256

…0472)Resolved an invalid parameter error (-2147024809) during PTY creation onWindows 11 22H2 (but not only) when connecting via JetBrains Toolboxwhich spawns the native SSH client with `-tt` forcing PTY allocationeven though there is no "terminal" on the client side to query its size.CreatePseudoConsole doesn't accept a 0x0 (zero width and zero height)console size and unfortunately, there is NO explicit documentation inthe official Microsoft documentation that states the minimum validvalues or explicitly prohibits 0x0.Looking at real-world implementations in the search results, allexamples use reasonable non-zero values.I tested this with a local Windows VM registered to dev.coder.com i.e.externally managed workspace.Fixes:#20468(cherry picked from commitb890930)