Comment 54 for bug 867424

A fairly reduced change is https://hg.mozilla.org/try/rev/def1122a86ba4a17de9da4ed6fa04323c819b753 (with the no-op https://hg.mozilla.org/try/rev/487f69ba0d14 as parent) - see https://treeherder.mozilla.org/#/jobs?repo=try&revision=959751bdb468. I think setenv and putenv share some code in glibc - so perhaps there's some interaction there, i.e. setenv calls prevent putenv leaks but removing the calls reveals them?

If the putenv leaks are something that is fixed in later glibc versions (than the try builder uses) that may explain why I can't reproduce this locally.