GRMustacheRenderNSFastEnumeration fix crash handling rendering error

[nolanw]

I copied the inserted code from other parts of the codebase where similar precautions are necessary (e.g. GRMustacheAccumulatorTag.m).

I included a test, but I'm not sure how the tests folder is organized, or if a test is even desired for this issue. Let me know if I can reorganize things for you.

[groue]

Thank you very much, Nolan! I happily merge your quality PR, and your code is shipped in v6.9.1 😃

I included a test, but I'm not sure how the tests folder is organized, or if a test is even desired for this issue. Let me know if I can reorganize things for you.

Tests are organized by version of the API : tests for APIs introduced in v6.0 go into the v6.0 folder, etc. This sounds pedantic, I know. The reason is that this allows to keep tests for deprecated (yet still supported) methods without getting any compiler warning for using those deprecated methods (see the #define GRMUSTACHE_VERSION_MAX_ALLOWED GRMUSTACHE_VERSION_XXX at the top of each test file). GRMustache API used to be not so stable, and this organization of tests has helped me a lot.

Your test incidentally generates a GRMustacheErrorCodeRenderingError which was introduced in v6.3, so I put it in v6.3.

I appreciate a lot your dedication. Do you want a push access to the repository?

[nolanw]

You are very quick!

That organization makes total sense now that you explain it.

Sure, I'll take push access. What would you like me to do with it?

[groue]

Sure, I'll take push access. What would you like me to do with it?

Well, I'm not sure I know how to answer this question. I really appreciated the quality of your PR, wording & code integration. This is not common... But I don't have any homework to give you :-)

[nolanw]

Well thanks! I was trying to ask about guidelines for contributing, would you prefer PRs from me still, stuff like that.

[groue]

I only have a forking guide. Do you wish yourself to extend GRMustache for Awful.app ?

[nolanw]

Oh, great! That's what I was looking for. I have no extensions planned, GRMustache works very well.

[groue]

All right. Well, tell me whenever you need something again :-)