René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Invoke-Command -SSHConnection breaks if the HostName string is [psobject]-wrapped ","articleBody":"The root cause is that a string returned from a cmdlet call or external program has an invisible extra `[psobject]` wrapper, and the `Invoke-Command` cmdlet fails to take that possibility into account.\r\n\r\nIn short: The command below breaks, because `(hostname)` has such an invisible wrapper, as evidenced by `(hostname)  -is [psobject]` being `$true`.\r\n\r\nThis is yet another manifestation of our old friend #5579.\r\n\r\nThe specific problem in `Invoke-Command` is [here](https://github.com/PowerShell/PowerShell/blob/77ddec161417f98f8f2e57e9e9ef57d00cdc4c98/src/System.Management.Automation/engine/remoting/commands/PSRemotingCmdlet.cs#L1063).\r\n\r\n# Steps to reproduce\r\n\r\n```powershell\r\n{ icm -SSHConnection @{ Hostname = (hostname) } -ScriptBlock { 'hi' }  } | \r\n  Should -not -Throw\r\n```\r\n\r\n# Expected behavior\r\n\r\nThe test should succeed, if the local computer is set up for being a SSH remoting target.\r\n\r\n# Actual behavior\r\n\r\nThe test fails:\r\n\r\n```\r\nExpected no exception to be thrown, but an exception \r\n\"The provided SSHConnection hashtable parameter name or element is null or empty.\" was thrown from line:1 char:3\r\n```\r\n\r\nNote that using `(hostname).psobject.BaseObject` or `\"$(hostname)\"` or `(hostname).ToString()` makes the problem go away.\r\n\r\nAs an aside: if the host name were truly invalid due not being a string, the error message would be misleading, because the problem is that the entry is of the _wrong type_, not that it is _null or empty_.\r\n\r\nA further aside: The comment above the `SSHConnection` parameter definition is incomplete: keys `Port` and `Subsystem` are missing.\r\n\r\n# Environment data\r\n\r\n\r\n```none\r\nPowerShell Core v7.0.0-preview.4\r\n```\r\n","author":{"url":"https://github.com/mklement0","@type":"Person","name":"mklement0"},"datePublished":"2019-10-02T20:34:33.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/10687/PowerShell/issues/10687"}