How trustworthy and robust is GHC?

I think the comparison to LLVM is pretty interesting actually! LLVM receives much more funding and has many more active contributors than GHC. And yet issues like #190540 still happen, where any program that used musttail or the tailcc calling convention with byval parameters (i.e. essentially any non-trivial program that used musttail or tailcc) was totally miscompiled under LLVM 22.1. This isn’t to say that there isn’t room for improvement in GHC’s processes (or LLVM’s), but I don’t think GHC is unique here in any way. Compilers are hard.