Bug 1423307 has been merged to m-c now. After you've updated m-c, you can re-run |./mach bootstrap| to pick up the newer clang binaries that will fix the _Ty problem.
-Ryan On Tue, Dec 5, 2017 at 2:14 PM, Ryan VanderMeulen <rvandermeu...@mozilla.com > wrote: > As a follow-up, it looks like updating to a newer LLVM version fixes the > problem. That update is being tracked in https://bugzilla.mozilla.org/ > show_bug.cgi?id=1423307. > > For anybody already hitting this bustage locally, you can try updating > your clang toolchain under ~/.mozbuild/clang to the one below until the > in-tree changes are landed: > https://queue.taskcluster.net/v1/task/Q7sN0gfPSE- > OAEV5vuGtEA/runs/0/artifacts/public/build/clang.tar.bz2 > > -Ryan > > On Tue, Dec 5, 2017 at 11:16 AM, Ryan VanderMeulen < > rvandermeu...@mozilla.com> wrote: > >> FYI, the VC++ 2017 v14.12 toolset included in the recently-released >> VS2017 15.5 update appears to have broken building Firefox due to issues >> with the Rust compiler (in particular, the version of libclang we ship with >> it) and one of the system headers: >> >> C:\PROGRA~2\MIB055~1\2017\COMMUN~1\VC\Tools\MSVC\1412~1.258\include\type_traits:898:47: >> error: '_Ty' does not refer to a value >> >> Which in turns leads to a Rust panic and build failure. >> >> The Visual Studio installer allows you to install the prior v14.11 >> toolset as well, but I haven't verified yet that our build system will >> properly use it if it's there. In the mean time, I'd strongly advise >> avoiding this update until it's sorted out. >> >> -Ryan >> > > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
