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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/64670] -fsanitize=vptr leads to "undefined reference to `typeinfo for class'"
Date: Tue, 10 Feb 2015 16:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64670

--- Comment #12 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Tobias Burnus from comment #11)
> Because log.o has due to the vptr sanitizer:
>                  U typeinfo for LogListener

And why isn't that reference satisfied by the definition in LogListener.o?