[Bug 244830] net-p2p/libtorrent-rasterbar: clang 10 crashes during build

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244830

--- Comment #4 from commit-hook at freebsd.org ---
A commit references this bug:

Author: dim
Date: Mon Apr 20 17:39:52 UTC 2020
New revision: 360129
URL: https://svnweb.freebsd.org/changeset/base/360129

Log:
  Merge commit ce5173c0e from llvm git (by Reid Kleckner):

    Use FinishThunk to finish musttail thunks

    FinishThunk, and the invariant of setting and then unsetting
    CurCodeDecl, was added in 7f416cc42638 (2015). The invariant didn't
    exist when I added this musttail codepath in ab2090d10765 (2014).
    Recently in 28328c3771, I started using this codepath on non-Windows
    platforms, and users reported problems during release testing
    (PR44987).

    The issue was already present for users of EH on i686-windows-msvc,
    so I added a test for that case as well.

    Reviewed By: hans

    Differential Revision: https://reviews.llvm.org/D76444

  This should fix 'Assertion failed: (!empty() && "popping exception stack
  when not empty"), function popTerminate, file
  /usr/src/contrib/llvm-project/clang/lib/CodeGen/CGCleanup.h, line 583'
  when building the net-p2p/libtorrent-rasterbar

  PR:           244830
  Reported by:  jbeich, yuri
  MFC after:    6 weeks
  X-MFC-With:   358851

Changes:
  head/contrib/llvm-project/clang/lib/CodeGen/CGVTables.cpp

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