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PSCredential.Empty.GetNetworkCredential() throws NRE instead of returning null per docs #4696

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PSCredential.Empty.GetNetworkCredential() throws NRE instead of returning null per docs#4696
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iSazonov
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Issue-BugIssue has been identified as a bug in the productIssue has been identified as a bug in the productResolution-FixedThe issue is fixed.The issue is fixed.WG-Enginecore PowerShell engine, interpreter, and runtimecore PowerShell engine, interpreter, and runtime
@Arnavion

Description

@Arnavion
Arnavion
opened on Aug 29, 2017
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Steps to reproduce

> [pscredential]::Empty.GetNetworkCredential()

Expected behavior

$null

Per the docs, an "uninitialized" PSCredential object should return null

MSDN also documents it as such, though only on the page of the explicit cast operator which just calls GetNetworkCredential

Actual behavior

Exception calling "GetNetworkCredential" with "0" argument(s): "Object reference not set to an instance of an object."
At line:1 char:1
+ [pscredential]::Empty.GetNetworkCredential()
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : NullReferenceException

Environment data

> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      5.0.10586.117
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.10586.117
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

_userName is null so SplitUserDomain throws at the IndexOf()

> $Error[0].Exception.InnerException.StackTrace

   at System.Management.Automation.PSCredential.SplitUserDomain(String input, String& user, String& domain)
   at System.Management.Automation.PSCredential.IsValidUserName(String input, String& user, String& domain)
   at System.Management.Automation.PSCredential.GetNetworkCredential()
   at CallSite.Target(Closure , CallSite , PSCredential )
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Issue-BugIssue has been identified as a bug in the productIssue has been identified as a bug in the productResolution-FixedThe issue is fixed.The issue is fixed.WG-Enginecore PowerShell engine, interpreter, and runtimecore PowerShell engine, interpreter, and runtime

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