https://bugzilla.novell.com/show_bug.cgi?id=659022
https://bugzilla.novell.com/show_bug.cgi?id=659022#c0 Summary: null-coalescing operator and the null keyword: not properly typed Classification: Mono Product: Mono: Compilers Version: SVN Platform: x86-64 OS/Version: Linux Status: NEW Severity: Normal Priority: P5 - None Component: C# AssignedTo: [email protected] ReportedBy: [email protected] QAContact: [email protected] Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.19) Gecko/2010102809 Iceweasel/3.0.6 (Debian-3.0.6-3) Consider this code:using System; namespace Test { public static class Program { private static void Main() { Exception ex = null ?? new Exception(); // 'null' is not properly assumed to be of type 'Exception' } } } The compiler will complain with: Test.cs(9,33): error CS0584: Internal compiler error: Test.cs(9,33): Mono.CSharp.ReducedExpression+ReducedExpressionStatement ExprClass is Invalid after resolve Test.cs(9,23): error CS0266: Cannot implicitly convert type `object' to `System.Exception'. An explicit conversion exists (are you missing a cast?) Needless to say, the expression above is rather useless, but this does, nonetheless, compile with csc.exe (and I believe it's proper code). Reproducible: Always Steps to Reproduce: 1. Create Test.cs; paste above code in. 2. Run dmcs Test.cs. Actual Results: Test.cs(9,33): error CS0584: Internal compiler error: Test.cs(9,33): Mono.CSharp.ReducedExpression+ReducedExpressionStatement ExprClass is Invalid after resolve Test.cs(9,23): error CS0266: Cannot implicitly convert type `object' to `System.Exception'. An explicit conversion exists (are you missing a cast?) Expected Results: Compile the code. ;-) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the QA contact for the bug. _______________________________________________ mono-bugs maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-bugs
