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Debug watched array item is shown as an empty string #1897
Description
Fully described here: microsoft/vscode#72433
Debugging PowerShell: an array value is shown as an empty string on the left but it's plainly not empty on hover or under locals:
System Details
VSCode version:
1.33.1 51b0b28134d51361cf996d2f0a1c698247aeabd8 x64
VSCode extensions:
- Fr43nk.seito-openfile@1.8.5
- ms-vscode.powershell@1.12.1
- rozzzly-dev.vscode-prompt-debug@0.0.2
PSES version: 1.12.1.0
PowerShell version:
Name Value
---- -----
PSVersion 5.1.16299.820
PSEdition Desktop
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
BuildVersion 10.0.16299.820
CLRVersion 4.0.30319.42000
WSManStackVersion 3.0
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
Issue Description
I am experiencing a problem with watching an item in a (large) array - the value is not displayed correctly (at all).
Expected Behaviour
Should be seeing the array value
Actual Behaviour
Array item is displayed as the empty string "" but only on the left. Elsewhere (hover, locals) it's displayed correctly
NOTE: I have verified this bug with all extensions (except the PowerShell extension of course) disabled.
Activity
TylerLeonhardt commentedon Apr 18, 2019
Keith Hill (@rkeithhill) I remember you talking about how a user could get a "logpoints"-like feature using the watch parameters... I believe that mechanism could also solve this problem, no?
noambonnie commentedon Apr 22, 2019
Possibly related: Seeing empty string for a non-empty string (but also on mouse-oveR). I have a function with the following signature:
Then the following code:
Printing requestID with
fmt.Println(requestID)prints a result (as expected). Watch, mouse-over show""rjmholt commentedon Apr 22, 2019
noambonnie That looks like Go rather than PowerShell. Is this in the PowerShell extension?
rjmholt commentedon Apr 22, 2019
Marc (@cawoodm) My suspicion is that the Watch window doesn't support an expression using the syntax expected. If you put the variable without the
[0], does it show the whole array? We've been trying to track down what syntax if any allows you to watch a single array member, but haven't been able to find any documentation of that. Have you seen this work elsewhere?rkeithhill commentedon Apr 22, 2019
That syntax is correct and I can get a watch like
$arr[1]to display data.rjmholt commentedon Apr 23, 2019
Ok, so it works sometimes in the PowerShell extension?
Might be worth showing both
$OP_A1andOP_A1[0]in Marc (@cawoodm)'s case.noambonnie commentedon Apr 23, 2019
Oops apologies. You're correct. I don't know how I ended up here.
cawoodm commentedon Apr 24, 2019
You might also notice the + in Watch is grayed out so I can't add new watches. To be honest the whole Variables function is very dodgy/buggy and I have to often restart VSCode to get it to behave.