I get a reproduceable error while compiling the ruby-2.2.5,1 port for FreeBSD 9.3 amd64.


Story:
Today I installed a new freebsd-builder machine for building ports using poudriere. Host OS on the builder is FreeBSD 10.3 amd64.

On this machine I let poudriere create four build jails:
10.3 amd64
10.1 amd64
9.3 amd64
9.3 i386

In all four jails I compile the same list of ports, where lang/ruby22 is one of them.

The port compiles just fine in three jails, but in the 9.3 amd64 jail, I repeatedly get a "Segmentation fault (core dumped)".

Syslog message:
2016-09-27 21:55:24 +02:00 freebsd-builder kernel: pid 71467 (conftest), uid 0: exited on signal 11 (core dumped)

Here's a snippet from the build logfile:
/usr/local/poudriere/data/logs/bulk/93amd64-default/2016-09-27_21h39m31s/logs/ruby-2.2.5,1.log
...
...
checking for timezone... yes
checking whether timezone requires zero arguments... no
checking for negative time_t for gmtime(3)... yes
checking for localtime(3) overflow correctly... no
checking whether right shift preserve sign bit... yes
checking whether _SC_CLK_TCK is supported... yes
checking stack growing direction on amd64... -1
checking for pthread_kill in -lpthread... yes
checking for pthread_np.h... yes
checking whether pthread_t is scalar type... yes
checking for sched_yield... (cached) yes
checking for pthread_attr_setinheritsched... yes
checking for pthread_attr_get_np... yes
checking for pthread_attr_getstack... yes
checking for pthread_get_stackaddr_np... no
checking for pthread_get_stacksize_np... no
checking for thr_stksegment... no
checking for pthread_stackseg_np... no
checking for pthread_getthrds_np... no
checking for pthread_cond_init... (cached) yes
checking for pthread_condattr_setclock... yes
checking for pthread_condattr_init... yes
checking for pthread_sigmask... yes
checking for pthread_setname_np... no
checking for pthread_getattr_np... no
checking for pthread_attr_init... yes
checking if mcontext_t is a pointer... no
checking for getcontext... yes
checking for setcontext... yes
checking if fork works with pthread... yes
checking whether ELF binaries are produced... yes
checking for elf.h... (cached) yes
checking elf_abi.h usability... no
checking elf_abi.h presence... no
checking for elf_abi.h... no
checking whether OS depend dynamic link works... yes
checking for procstat_open_sysctl in -lprocstat... yes
checking for procstat_getvmmap... yes
checking execinfo.h usability... yes
checking execinfo.h presence... yes
checking for execinfo.h... yes
checking for backtrace in -lexecinfo... yes
checking for unw_backtrace in -lunwind... no
checking for backtrace... yes
checking for broken backtrace... Segmentation fault (core dumped)   <----------
yes
checking valgrind/memcheck.h usability... no
checking valgrind/memcheck.h presence... no
checking for valgrind/memcheck.h... no
checking for strip... strip
checking for __builtin_setjmp... yes with cast ()
checking for setjmp type... __builtin_setjmp
checking for prefix of external symbols... NONE
checking pthread.h usability... yes
...
...