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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"MshHostUserInterface.cs: Race condition referencing and setting systemTranscript field.","articleBody":"Currently, the systemTranscript field is updated by StopAllTranscribing and GetSystemTranscriptOption; however, GetSystemTranscriptOption updates the field within a lock but returns the field value outside the lock.  From the code,  the implication is the value just set in the field should also be returned but a race can occur with StopAllTranscribing that can result in a null reference being returned.\r\n\r\nSteps to reproduce\r\n------------------\r\n\r\nCode review\r\n\r\nExpected behavior\r\n-----------------\r\n\r\nEither a comment clarify the intent or function should return the updated field value.\r\n\r\nActual behavior\r\n---------------\r\n\r\nNot deterministic\r\n\r\nEnvironment data\r\n----------------\r\n\r\n\u003c!-- provide the output of $PSVersionTable --\u003e\r\n\r\nPSVersion                      6.1.0-preview.535\r\nPSEdition                      Core\r\nGitCommitId                    v6.1.0-preview.535\r\nOS                             Microsoft Windows 10.0.17070\r\nPlatform                       Win32NT\r\nPSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}\r\nPSRemotingProtocolVersion      2.3\r\nSerializationVersion           1.1.0.1\r\nWSManStackVersion              3.0\r\n","author":{"url":"https://github.com/dantraMSFT","@type":"Person","name":"dantraMSFT"},"datePublished":"2018-01-05T18:22:20.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/5799/PowerShell/issues/5799"}