bash 3.2.39 -- race condition

[Douglas Moyes]

I nearly brought down a server today.

# alias d="perl-script "
....
# d() {
# perl-script $1 |grep something|cut -d ' ' -f 3
# }
# d something
..... ..... .... CRASH

turns out bash went into a loop calling d over and over again, which 
resulted in thousands of grep, bash, and -d processes being executed. It 
wasn't pretty.