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Extra tail instruction corrupts stack? #13447
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AI-thinks-windows-onlyArea-Compiler-CodeGenIlxGen, ilwrite and things at the backendIlxGen, ilwrite and things at the backendBugImpact-Medium(Internal MS Team use only) Describes an issue with moderate impact on existing code.(Internal MS Team use only) Describes an issue with moderate impact on existing code.good first issuehelp wanted
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AI-thinks-windows-onlyArea-Compiler-CodeGenIlxGen, ilwrite and things at the backendIlxGen, ilwrite and things at the backendBugImpact-Medium(Internal MS Team use only) Describes an issue with moderate impact on existing code.(Internal MS Team use only) Describes an issue with moderate impact on existing code.good first issuehelp wanted
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Done
Repro steps
Clone https://github.com/kerams/repro/, open Program.fs, target either
net6.0ornet7.0, run in Release mode.Expected behavior
Printed 10 times.
Actual behavior
This is printed the first 2 times:
Known workarounds
Remove
[<Struct>]fromMyResult.OR
Put
()at the end of thewriteStringfunction. The before and after diff is here. That extra tail instruction is a bit suspicious.Related information
dotnet --info
.NET SDK: Version: 7.0.100-preview.5.22307.18 Commit: bd8b088037Runtime Environment:
OS Name: Windows
OS Version: 10.0.19044
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\7.0.100-preview.5.22307.18\
global.json file:
Not found
Host:
Version: 7.0.0-preview.5.22301.12
Architecture: x64
Commit: 425fedc0fb
.NET SDKs installed:
6.0.400-preview.22301.10 [C:\Program Files\dotnet\sdk]
7.0.100-preview.5.22307.18 [C:\Program Files\dotnet\sdk]
.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.0-preview.5.22303.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.0-preview.5.22301.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.0-preview.5.22302.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]