[LLVMdev] SIGILL in regex::assign() (original) (raw)
Tim Northover t.p.northover at gmail.com
Thu Feb 12 20:57:44 PST 2015
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Hi Paweł
Where should I report the bug?
LLVM appears to be calling this function from libstdc++'s regex.h (4.9.2 in my case):
basic_regex& assign(basic_regex&& __rhs) { _M_flags = __rhs._M_flags; _M_original_str = std::move(__rhs._M_original_str); __rhs._M_automaton.reset(); this->imbue(__rhs.getloc()); }
This is declared to return a basic_regex but doesn't, which LLVM ends up emitting an undefined instruction trap for. This is valid because the function has undefined behaviour.
So I say libstdc++, unless they've already fixed it.
Cheers.
Tim.
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