[llvm] r291918 - Fix UBSan bots by blacklisting bits/stl_tree.h.

[Hans Wennborg via llvm-commits]

On Fri, Jan 13, 2017 at 9:30 AM, Ivan Krasin via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> Author: krasin
> Date: Fri Jan 13 11:30:10 2017
> New Revision: 291918
>
> URL: http://llvm.org/viewvc/llvm-project?rev=291918&view=rev
> Log:
> Fix UBSan bots by blacklisting bits/stl_tree.h.
>
> Summary:
> libstdc++ has some undefined behavior in bits/stl_tree.h that
> has recently became excercised by some of the LLVM code.
> Given that fixing libstdc++ will take years, adding the file
> into a blacklist to fix bots seems like a necessity.
>
> Reviewers: vitalybuka
>
> Subscribers: llvm-commits, mgorny
>
> Differential Revision: https://reviews.llvm.org/D28686

Should we merge this to 4.0?

Probably not a huge benefit, but it seems pretty risk free, and maybe
nice to have if someone tries to run ubsan on the released version.