I know you were probably just throwing out the “90%” statistic, but if you take that as a given, the implication that 10% of the libstdc++ bugs on file are legit is a worrisome notion in and of its own right. I don’t want to be responsible for triaging those bugs (and nor do you, I am guessing; this being why the reports are valueless) but the fact that this is the bug rate in this, a gold-standard library in common, ubiquitous use… well as far as I can see, this is the context in which that the OP’s article should be considered.

… I build all of my C++ projects with Clang and link them against libc++, so I don’t know if I am dodging a very high-caliber bullet (so to speak) or if the other shoe will drop at some point, and I will find myself going down the OP’s rabbit-hole of library-bug investigation.