Using pprof on appengine standard environment

[Pablo Rozas Larraondo]

I have a simple Go application deployed to Appengine standard environment which I want to profile. I've added import _ "net/http/pprof" but the service panics when I try to use it with pprof:

> go tool pprof https://[my-app]/

Fetching profile over HTTP from https://[my-app]/debug/pprof/profile

https://[my-app]/: server response: 500 Internal Server Error

failed to fetch any source profiles

Looking at the logs, the cause of the 500 is:

panic: could not translate binary profile to proto format: truncated profile 

goroutine 9 [running]: 

      runtime/pprof.profileWriter(0x2ac56f2591a8, 0xc0085e2480) go/src/runtime/pprof/pprof.go:712 +0x1e5 

      created by runtime/pprof.StartCPUProfile go/src/runtime/pprof/pprof.go:688 +0x122

Any ideas on how to make this work?

Thank you,

Pablo