Fix disappearing output in PowerShell 5.1 #2023
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Instead of every symbol reference lookup. Though we should probably still do this less often, like in the `prompt`.
Same fix as applied in PowerShell/PSReadLine#3629
The previous logic could accidentally set the boolean flag to `true`, causing the pipeline to be run when it was not necessary.
Since it doesn't change and we're always using it.
What a bug! In PowerShell 5.1 our artificial pipeline for event handling (among other possible PowerShell tasks) could cause the output to just disappear. Turns out a bug in 5.1 with the transcript was being triggered. Scripts without `Out-Default` would get it appended with `-TranscribeOnly True` in order for the transcription to happen...but the `TranscribeOnly` field could erroneously not be set back to `false`! This would cause all output to just "disappear." It was fixed in PowerShell 7, but we still have to work around it for PowerShell 5.1 by resetting it.
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I half want to make this a bunch of PRs because it's quite a few fixes, oh well! |
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What a bug! In PowerShell 5.1 our artificial pipeline for event handling (among other possible PowerShell tasks) could cause the output to just disappear. Turns out a bug in 5.1 with the transcript was being triggered. Scripts without
Out-Defaultwould get it appended with-TranscribeOnly Truein order for the transcription to happen...but theTranscribeOnlyfield could erroneously not be set back tofalse! This would cause all output to just "disappear." It was fixed in PowerShell 7, but we still have to work around it for PowerShell 5.1 by resetting it.Resolves PowerShell/vscode-powershell#3991, and fixes a few other things too.
Unfortunately due to the implementation of PowerShell 5.1's transcript, we still get a flood of
[System.Diagnostics.DebuggerHidden()]param() 0in the transcript sometimes. It's annoying, and can lead to massive transcript files, but I don't believe it's the root cause. We're still looking for a way to fix that.