ports/139256: [shells/bash] faulty parser code generated by bison

[Pavel Gorshkov]

>Number:         139256
>Category:       ports
>Synopsis:       [shells/bash] faulty parser code generated by bison
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Sep 30 16:40:01 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Pavel Gorshkov
>Release:        7.2-STABLE-amd64
>Organization:
>Environment:
FreeBSD lifebook 7.2-STABLE FreeBSD 7.2-STABLE #2: Tue May 5 20:20:45 MSD 2009 root at lifebook:/usr/obj/usr/src/sys/LIFEBOOK amd64
>Description:
See below for what I believe to be 100% reproducible on amd64 (bash-4.0.33, bison-2.4.1).  Note the same command being run over and over again.
>How-To-Repeat:
$ time for i in 1; do echo $(echo 1); done
1

real    0m0.001s
user    0m0.000s
sys     0m0.001s
$ time for i in 1; do echo $(echo 1); done
bash: syntax error near unexpected token `do'
$ time for i in 1; do echo $(echo 1); done
1

real    0m0.001s
user    0m0.000s
sys     0m0.001s
$ time for i in 1; do echo $(echo 1); done
bash: syntax error near unexpected token `do'
$ time for i in 1; do echo $(echo 1); done
1

real    0m0.001s
user    0m0.000s
sys     0m0.001s
$ time for i in 1; do echo $(echo 1); done
bash: syntax error near unexpected token `do'

>Fix:
When building bash, use the default setting for $YACC (YACC='bison -y')

>Release-Note:
>Audit-Trail:
>Unformatted: