Golang heap corruption during garbage collection

I've been playing with Go recently, it's an interesting programming language (I recommend the tour).

It is compiled, garbage-collected and memory safe.. as long as you don't find a bug in the runtime. Alex Reece (@awreece) from PPP recently blogged about a nice vulnerability, I found it interesting and started following more of the changes.

This one looked fun: runtime: fix heap corruption during GC (#5554), let's try to exploit it. The bug was not present in Go 1.0.3, present in Go 1.1 but will be fixed in Go 1.1.1 (to be released next week).