[MacPorts] #60961: povray @3.7.0.8 build failure, Xcode 11.6 clang++ internal error (was: povray 3.7.0.8 failed installing)

[MacPorts]

#60961: povray @3.7.0.8 build failure, Xcode 11.6 clang++ internal error
--------------------------+--------------------
  Reporter:  jonas-bjork  |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.3
Resolution:               |   Keywords:
      Port:  povray       |
--------------------------+--------------------

Comment (by jmroot):

 I believe this is the relevant info from the log:
 {{{
 :info:build fatal error: error in backend: Cannot emit physreg copy
 instruction
 :info:build clang: error: clang frontend command failed with exit code 70
 (use -v to see invocation)
 :info:build Apple clang version 11.0.3 (clang-1103.0.32.62)
 :info:build Target: x86_64-apple-darwin19.6.0
 :info:build Thread model: posix
 :info:build InstalledDir: /Library/Developer/CommandLineTools/usr/bin
 :info:build clang: note: diagnostic msg: PLEASE submit a bug report to
 http://developer.apple.com/bugreporter/ and include the crash backtrace,
 preprocessed source, and associated run script.
 :info:build clang: note: diagnostic msg:
 :info:build ********************
 :info:build PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
 :info:build Preprocessed source(s) and associated run script(s) are
 located at:
 :info:build clang: note: diagnostic msg:
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_povray/povray/work/.tmp
 /imageutil-7ed71c.cpp
 :info:build clang: note: diagnostic msg:
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_povray/povray/work/.tmp
 /imageutil-7ed71c.sh
 :info:build clang: note: diagnostic msg: Crash backtrace is located in
 :info:build clang: note: diagnostic msg:
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_povray/povray/work/.home/Library/Logs/DiagnosticReports/clang_
 <YYYY-MM-DD-HHMMSS>_<hostname>.crash
 :info:build clang: note: diagnostic msg: (choose the .crash file that
 corresponds to your crash)
 :info:build clang: note: diagnostic msg:
 :info:build ********************
 }}}

 This needs to be reported to Apple, as the message says, so they can fix
 it in a future Xcode release. In the meantime, maybe we need to blacklist
 this specific clang version in povray.

-- 
Ticket URL: <https://trac.macports.org/ticket/60961#comment:2>
MacPorts <https://www.macports.org/>
Ports system for macOS