Build fail when using var = dynamic

Bit of a showstopper for me, this. I've got 700 tests using a dynamic type but with the var keyword. Builds fine in VS and MonoDevelop, but not in NCrunch, which is treating the "dynamic" as "object". I suspect this is a known issue, but until it's fixed, I can't use NCrunch.

Hi Mark,

Thanks for posting! I have heard reports of this problem although I've yet to be able to get my hands on a test solution that can reproduce the problem. Is there any chance you could send through to me a solution that can do this?


Cheers,

Remco

Mark's talking about his Simple.Web project.

The git repository is: https://github.com/markrendle/Simple.Web.git

Excellent thank you!

I've just given this solution a spin. Unfortunately it didn't produce the problem described (all tests passed for me with one exception, which looked like an unrelated issue). I wonder if there may be something about this issue that's system related. Graeme - does the issue also occur for you?

Hi Remco,

It's not Simple.Web, it's Simple.Data that has the problems. http://github.com/markrendle/Simple.Data

Cheers,
Mark

Hi Mark,

Thanks for posting the link to your solution. With this information, I've been able to isolate the issue and I can confirm that a fix will be in the 1.40b release due out in a few days time. Meanwhile I can suggest a couple of workarounds:

1. Add a parameter to each of the problematic methods that are returning a dynamic type. The parameter can be completely unused, but it will cause NCrunch's instrumention to work along a different code path and will prevent it from corrupting the assembly.
2. Turn off the NCrunch 'Instrument Output Assembly' configuration option for any projects containing problematic methods. This will also disable code coverage reporting for these projects.

It's somewhat surprising for me that this issue has existed for so long. I guess not too many people are writing parameterless methods that return dynamic types across assembly boundaries.


Cheers,

Remco

I think Simple.Data's Database.Open may be the only one. But more and more people are using it!

Looking forward to 1.40. NCrunch is like crack; I'm missing my hits.

For anyone interested, 1.40b has just been released including a fix for the above issue. Thanks again for the help in examining this problem.