{"action":"closed","issue":{"url":"https://api.github.com/repos/Microsoft/visualfsharp/issues/1542","repository_url":"https://api.github.com/repos/Microsoft/visualfsharp","labels_url":"https://api.github.com/repos/Microsoft/visualfsharp/issues/1542/labels{/name}","comments_url":"https://api.github.com/repos/Microsoft/visualfsharp/issues/1542/comments","events_url":"https://api.github.com/repos/Microsoft/visualfsharp/issues/1542/events","html_url":"https://github.com/Microsoft/visualfsharp/issues/1542","id":177464954,"number":1542,"title":"I just built fsharp.core.dll with warning level 5  and only got these 16 errors","user":{"login":"KevinRansom","id":5175830,"avatar_url":"https://avatars.githubusercontent.com/u/5175830?v=3","gravatar_id":"","url":"https://api.github.com/users/KevinRansom","html_url":"https://github.com/KevinRansom","followers_url":"https://api.github.com/users/KevinRansom/followers","following_url":"https://api.github.com/users/KevinRansom/following{/other_user}","gists_url":"https://api.github.com/users/KevinRansom/gists{/gist_id}","starred_url":"https://api.github.com/users/KevinRansom/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/KevinRansom/subscriptions","organizations_url":"https://api.github.com/users/KevinRansom/orgs","repos_url":"https://api.github.com/users/KevinRansom/repos","events_url":"https://api.github.com/users/KevinRansom/events{/privacy}","received_events_url":"https://api.github.com/users/KevinRansom/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/Microsoft/visualfsharp/labels/Up%20for%20Grabs","name":"Up for Grabs","color":"90EE90"}],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-09-16T16:17:30Z","updated_at":"2016-09-20T16:24:32Z","closed_at":"2016-09-20T16:24:32Z","body":"Does anyone want to see if we can remove these errors so we can up the warning level for fsharp.core builds?\r\n\r\n\r\n\"C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj\" (Rebuild target) (1) ->\r\n(CoreCompile target) ->\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\local.fs(151,45): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from a\r\n member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\local.fs(151,61): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from a\r\n member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\local.fs(154,51): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from a\r\n member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\local.fs(154,67): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from a\r\n member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\map.fs(579,47): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from a m\r\nember and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\map.fs(579,64): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from a m\r\nember and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\map.fs(579,101): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from a\r\nmember and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\map.fs(579,118): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from a\r\nmember and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\reflect.fs(131,35): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from\r\n a member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\reflect.fs(132,35): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from\r\n a member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\reflect.fs(132,78): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from\r\n a member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\reflect.fs(133,35): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from\r\n a member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\reflect.fs(133,78): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from\r\n a member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\reflect.fs(133,104): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct fro\r\nm a member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\printf.fs(1097,82): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from\r\n a member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n  C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\printf.fs(1106,84): error FS0052: The value has been copied to ensure the original is not mutated by this operation or because the copy is implicit when returning a struct from\r\n a member and another member is then accessed [C:\\microsoft\\visualfsharp\\src\\fsharp\\FSharp.Core\\FSharp.Core.fsproj]\r\n\r\n    0 Warning(s)\r\n    16 Error(s)\r\n"}}
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