fix issues 10277 & 6045:improve demangling for function local symbols

[rainers]

http://d.puremagic.com/issues/show_bug.cgi?id=6045
http://d.puremagic.com/issues/show_bug.cgi?id=10027

allows function names as part of a qualified name, removing return type and function attributes. The compiler does this as well with PRETTY_FUNCTION, but also removes function arguments which probably is too much.

This needs dlang/phobos#1592 to pass unittests.

[rainers]

Can we tell the auto tester to merge a combination of branches from dmd/druntime/phobos for testing?
If not, what is the established work flow if phobos expects druntime to do something stupid?

[ghost]

We can't do this with the tester now, but alternatively you could make a pull for phobos which simply comments out those two asserts (this one and this one) and then this druntime pull can be properly tested and merged, followed by testing and merging of dlang/phobos#1592

[rainers]

Thanks. I have just disabled the unittest in the phobos pull request, so it can be merged and still documents desired behaviour. Afer this pull is accepted, "version(none)" can be removed. (Another pull request will probably only have merge conflicts.)

[ghost]

Ok merged it, let's wait for the results on this one now.