Replacing that 1 for 2 it's enough for making it work, for me, it seems.
But it's not enough to get valgrind happy (It still reports 4 "definitely
lost" blocks, all from that putenv2 function). Perhaps that's related to the
comment:
/*
* Do not free envstr because it becomes part of the environment
* on some operating systems. See port/unsetenv.c::unsetenv.
*/
Hernán J. González
http://hjg.com.ar/