Repository navigation
Write-Host renders an [xml] or [XmlElement] instance as an empty line. #24508
Description
Prerequisites
- Write a descriptive title.
- Make sure you are able to repro it on the latest released version
- Search the existing issues.
- Refer to the FAQ.
- Refer to Differences between Windows PowerShell 5.1 and PowerShell.
Steps to reproduce
Write-Host ([xml] '<OhElement>Where art thou?</OhElement>').DocumentElementNote: The problem may come down to the base class, System.Xml.XmlNode, implementing IEnumerable, and Write-Host not only enumerating the given instance itself, but doing so recursively, down to the leaf elements that by definition have nothing to enumerate. As argued below, no enumeration should take place at all.
Expected behavior
OhElementi.e., the name of the element, as if you had applied .ToString() to the instance.
Note that even though such instances technically implement IEnumerable, for consistency with pipeline enumeration behavior I expect them not to be enumerated.
I suspect that the bug is related to the fact that they are enumerated.
Actual behavior
(An empty line prints.)Error details
No response
Environment data
PowerShell 7.5.0-preview.5 (problem dates back to Windows PowerShell)Visuals
No response
Activity
SteveL-MSFT commentedon Dec 12, 2024
does the right thing, so it's definitely an issue during enumeration
daxian-dbw commentedon Dec 12, 2024
When piping to
Write-Host, theXmlElementobject is wrapped into aPSObject, and falls to thePSObject.ToStringcall.But for
Write-Host ([xml] '<OhElement>Where art thou?</OhElement>').DocumentElement, theXmlElementobject is NOT wrapped toPSObject, so it's processed as an enumerable.XmlNodeshouldn't be considered as enumerable.daxian-dbw commentedon Dec 12, 2024
Write-HostrendersIDictionaryinconsistently depending on how the value is passed in. This is tracked by #24671.microsoft-github-policy-service commentedon Dec 13, 2024
📣 Hey Michael Klement (@mklement0), how did we do? We would love to hear your feedback with the link below! 🗣️
🔗 https://aka.ms/PSRepoFeedback