VSCode Terminal drops output from AWS CLI

[jdalley]

I had posted this as a question on Stack Overflow and unfortunately hadn't received any insight from it - so I was encouraged to drop this here as an issue.

Summary:
While running some AWS CLI commands recently via Powershell in the VSCode terminal, I noticed it completely drops/doesn't render all the output.

• VSCode Version: 1.19.3
• OS Version: Windows 10 Pro (Version 1709, Build 16299.214)
• Powershell PSVersion: 5.1.16299.98

Steps to Reproduce:

1. On a machine with AWS CLI set up, make a call that results in a moderate size (50+ lines) of output. In my case I used: aws elb describe-load-balancers.
2. This command will show anywhere between 14 and 122 lines of output before returning (cut-off) to the prompt. Whereas if I take the same command and run it in a standalone instance of Powershell it will print all 971 lines.

Additional Information:

• This happens on a fresh terminal window with no previous buffered lines.
• I'm using the same powershell .exe configured in VSCode's terminal as I ran standalone:
  "powershell.powerShellExePath": "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe", "terminal.integrated.shell.windows":"C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe"
• This doesn't seem to be caused by the terminal.integrated.scrollback setting - it's set quite high, and like I said it can get cut off at a low number of printed lines.

Does this issue occur when all extensions are disabled?: Yes

[Tyriar]

@jdalley I notice you are using the powershell extension, does this happen when running through on of the extension's integrated consoles?

[jdalley]

This does happen through the "PowerShell Integrated Console" as well as the default Integrated Terminal - both will cut off output.

[Tyriar]

This is likely related to winpty, tracking in #45693