ErrorWeirdness

errortest.ps1

Function Inner
{
    [CmdletBinding()]
    Param ()

    Try
    {
        throw "Inner exception"
    }
    Catch
    {
        Return $null
    }


    Return "yep"

}

Function Outer
{
    [CmdletBinding()]
    Param ()

    Try
    {
        $a = Inner -ErrorAction Stop -ErrorVariable "innerErr"
    }
    Catch
    {
        
    }

    if ($a -eq $null)
    {
        Write-Error "An error occurred"
    }
    
}

Outer -ErrorAction SilentlyContinue -ErrorVariable myvar
$myvar

Running in PSv4, the errorobject ($myvar) only contains one error record. Running in PSv5, the inner exception from the child function is also surfaced.

That is truly bizarre behavior.