[bug-gzip] gzip-1.5 test failures on FreeBSD 9.0 and NetBSD 5.1

[Nelson H. F. Beebe]

I got successful builds and validations last night on more than 20
flavors of Unix for the new gzip-1.5 release, and installed them this
morning.

However, on FreeBSD 9.0 and NetBSD 5.1 (both x86), multiple builds
have gone into infinite loops at the same point, running for hours
until I killed them this morning:

        PASS: helin-segv
        make[4]: *** Deleting file `help-version.log'
        make[4]: *** [help-version.log] Terminated
        Terminated

        PASS: helin-segv
        FAIL: help-version

The attempt this morning used

        set path=(/bin /usr/bin)
        env CC=cc ./configure && /usr/local/bin/make all check

The top utility shows the loop is happening in a bash process.  Here
is an example from a restarted "make check":

make output:
        PASS: helin-segv

top output:
           PID USERNAME THR PRI NICE  SIZE   RES STATE    TIME    CPU COMMAND
         80442 beebe      1 201    0 3732K 2092K RUN      0:27 99.89% bash-4.2

A gdb traceback of the bash process is probably of little use, but
here it is anyway:

        (gdb) where
        #0  0x080a3ae0 in sh_xmalloc ()
        #1  0x0807a41b in string_list_internal ()
        #2  0x0807a570 in string_list ()
        #3  0x08063396 in execute_case_command ()
        #4  0x0805fad0 in execute_command_internal ()
        #5  0x0805f143 in execute_command ()
        #6  0x08063752 in execute_while_or_until ()
        #7  0x08063635 in execute_while_command ()
        #8  0x0805fb03 in execute_command_internal ()
        #9  0x0805f143 in execute_command ()
        #10 0x0804dc91 in reader_loop ()
        #11 0x0804bd48 in main ()

On both machines, the bash version is 4.2.0(1), the same as on most of
our other systems.

-------------------------------------------------------------------------------
- Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
- University of Utah                    FAX: +1 801 581 4148                  -
- Department of Mathematics, 110 LCB    Internet e-mail: address@hidden  -
- 155 S 1400 E RM 233                       address@hidden  address@hidden -
- Salt Lake City, UT 84112-0090, USA    URL: http://www.math.utah.edu/~beebe/ -
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