Hi, I have encountered segfaults while using projection of exact solution when using variables that are defined in specific subdomains. I traced the problem to system_projection.C and found that the fix is to check whether the variable is defined for the subdomain in question before performing the projection. This would also provide a cost benefit by not computing L2 projections when not needed.
I've attached a patch for the same. Its just couple of lines of code but it solved the issues I was encountering with my code. It would be very helpful for me if someone can check whether there are any downsides to the patch and if it really is the fix needed here. Also, if anyone else has a test case, then do check whether the patch fixes the problem before committing it. I sent a code to Roy yesterday and that can serve as a test code for this use case also. Thanks, vijay
projection.patch
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