varenv3.sub fails on some systems some of the time.

[Scott]

Hi,

When we run the bash unittests on some system we occasionally get a error
in the varenv3.sub script.

./varenv3.sub: cannot open named pipe /tmp/bash_tests.8150/sh-np-5140328 for 
writing: No such file or directory
./varenv3.sub: line 30: /tmp/bash_tests.8150/sh-np-843885584: No such file or 
directory

We cross compile bash for our system with:

 ./configure --build=x86_64-unknown-linux-gnu --host=x86_64-pc-linux-gnu 
--libdir=/lib64 --prefix=/ --disable-nls ac_cv_func_mmap_fixed_mapped=yes 
gt_cv_int_divbyzero_sigfpe=yes ac_cv_func_strcoll_works=yes 
bash_cv_func_ctype_nonascii=no bash_cv_dup2_broken=no bash_cv_pgrp_pipe=no 
bash_cv_sys_siglist=no bash_cv_decl_under_sys_siglist=yes 
bash_cv_under_sys_siglist=yes bash_cv_opendir_not_robust=no 
bash_cv_ulimit_maxfds=yes bash_cv_getenv_redef=yes bash_cv_getcwd_malloc=yes 
bash_cv_func_sigsetjmp=present bash_cv_func_strcoll_broken=no 
bash_cv_printf_a_format=yes bash_cv_must_reinstall_sighandlers=no 
bash_cv_job_control_missing=present bash_cv_sys_named_pipes=present 
bash_cv_wcontinued_broken=no bash_cv_unusable_rtsigs=no bash_cv_dev_fd=absent 
bash_cv_dev_stdin=absent bash_cv_mail_dir=/dev/null

GCC 4.8.2, glibc 2.18, seen on kernels 3.14.8 and 3.16.6

I'm hoping someone can help me narrow down the issue to find out what we
are doing wrong.  The problem seems to have been there since we upgraded to
bash 4.3.

Happy to give more information and try things out.

Kind Regards

Scott.