Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report on
GitHub or Developer Community with
your current version information, steps to reproduce, and relevant error
messages or log files if you are hitting an issue that looks similar to
this resolved bug and you do not yet see a matching new report.
Created attachment 13277 [details]
Test file showing problem.
MCS incorrectly outputs CS0019 when comparing a reference against (null) in brackets.
See the attached test file with the following lines:
Wibble w = new Wibble();
if (w == (null)) ...
$ mcs test.cs
test.cs(6,9): error CS0019: Operator `==' cannot be applied to operands of type `Wibble' and `null'
Compilation failed: 1 error(s), 0 warnings
Without the brackets around the null the code compiles without any error.
Obviously this test case is the smallest example I could produce and is easily modified to compile.
But the real life situation is a bit more complicated and involves generated code so it is a little tricky to 'just remove the brackets', but if this issue could be fixed, that would be great. Thanks.
OS: Mac OS-X 10.10.5
Mono: Mono JIT compiler version 4.0.4
MCS: Mono C# compiler version 18.104.22.168
Created attachment 13278 [details]
Attachment with text/plain mime format
Fixed in master