Source: libc++ Version: 3.7.0-1 It failed to build on arm64:
https://buildd.debian.org/status/package.php?p=libc%2B%2B&suite=sid The error was a segmentation fault in 'Greedy Register Allocator'. There are similar reports elsewhere, such as bug #796343: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=796343 It seems that arm64 needs llvm-3.7.
