From the commit message: "This bug has existed since Go 1.4. Until then the select code was implemented in C, 'done uint32' was a C stack variable 'uint32 done

From the commit message: "This bug has existed since Go 1.4. Until then the select code was implemented in C, 'done uint32' was a C stack variable 'uint32 done', and C stacks never moved." It'll affect probably most running jobs out there, as Go 1.4 was released on Dec 10, 2014.