Jim Meyering (jim(a)meyering.net) said:
I posted about MALLOC_PERTURB_ about a year ago,
http://thread.gmane.org/gmane.linux.redhat.fedora.devel/132690
but it is clear that not everyone is setting the variable, so for those
who didn't take the time last year, or who are new to the subject,
do yourself a favor and set MALLOC_PERTURB_ to a value in 1..255
everywhere.
See the 'debugmode' package.
Bill