Many regression test failures

I just ran the regression tests in a new build and got:

## ------------- ##
## Test results. ##
## ------------- ##

ERROR: 457 tests were run,
139 failed (4 expected failures).
46 tests were skipped.

I can send the testsuite.log, but it is quire large (1.3 MB).

What is out of the ordinary is that I cam using bash-5.0.

I'll give one example here, but I suspect most of the other failures are 
similar:


499. acfunctions.at:41: testing AC_FUNC_VPRINTF ...
./acfunctions.at:41: autoconf --force -W obsolete
./acfunctions.at:41: /bin/sh -n configure
stderr:
./acfunctions.at:41: autoheader
./acfunctions.at:41: ./configure $configure_options -C
stdout:
configure: creating cache config.cache
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for vprintf... yes
checking for _doprnt... no
configure: updating cache config.cache
configure: creating ./config.status
config.status: creating config.h
./acfunctions.at:41: at_check_env
./acfunctions.at:41: ./configure $configure_options -C
stdout:
configure: loading cache config.cache
checking for gcc... (cached) gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... (cached) o
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ISO C89... (cached) none needed
checking for vprintf... (cached) yes
checking for _doprnt... (cached) no
configure: creating ./config.status
config.status: creating config.h
config.status: config.h is unchanged

./acfunctions.at:41: at_check_env
./acfunctions.at:41: $at_diff "config-h.r1" "config-h.r2"
./acfunctions.at:41: $at_diff "at_config_vars-state-env.r1" 
"at_config_vars-state-env.r2"
--- /dev/null   2018-12-27 19:23:56.521276418 -0600
+++ /sources/autoconf-2.69/tests/testsuite.dir/at-groups/499/stdout 
2019-01-09 22:41:58.863541213 -0600
@@ -0,0 +1,13 @@
+--- at_config_vars-state-env.r1        2019-01-09 22:41:58.861541253 -0600
++++ at_config_vars-state-env.r2        2019-01-09 22:41:58.862541233 -0600
+@@ -2,8 +2,8 @@
+ BASH=/bin/sh
+ 
BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:hostcomplete:interactive_comments:progcomp:promptvars:sourcepath
+ BASH_ALIASES=()
+-BASH_ARGC=()
+-BASH_ARGV=()
++BASH_ARGC=([0]="1")
++BASH_ARGV=([0]="-C")
+ BASH_CMDS=()
+ BASH_LINENO=([0]="0")
+ BASH_SOURCE=([0]="./configure")
./acfunctions.at:41: exit code was 1, expected 0


   -- Bruce Dubbs
      linuxfromscratch.org