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Found: Previously accepted code now results in what look like false positive errors.
Steps to reproduce:
* Load the attached project under the first C# 6.0-bearing alpha release.
* Build the project.
Program.cs(24,34): error CS8080: `CS6.AutoProperties.MainClass.Baz.Condition': Auto-implemented properties must override all accessors of the overridden property
Expected: No error.
The simple case of an auto-implemented get-only property works fine (as noted).
In the abstract/overridden case, the override implements exactly the same set of accessors as prescribed by the abstract class. The same construct worked fine up until this release. So this is either a case of shouldn't-have-worked-before (past bug) or should-work-now (new bug).
Any insight appreciated.
Created attachment 10635 [details]
Note that an initial workaround is to declare a public setter for the hierarchy, but this of course changes the contract from what was intended.
Note that MSVS 2015 CTP appears to accept this case just fine --- maybe just a case of some upstream Roslyn fixes that haven't yet been merged?
Fixed in master
Has this fix been incorporated into any of the Mono releases? I am still having this issue running the MDK installed with the Alpha channel on OS X (22.214.171.124).
The fix will be included in Mono 4.2
Is there a chance of merging this to 4.0? This effectively breaks a C# 6 language feature that is supposedly supported in 4.0 for any readonly overridable properties.