(gdb) info goroutines
Python Exception <class 'gdb.error'>
Attempt to extract a component of a value that is not a (null).:
Error occurred in Python command:
Attempt to extract a component of a value that is not a (null).
Version:
GDB: 7.7.1
Python: 3.4.1
OS: CentOS 6.5 x86_64
From http://golang.org/doc/gdb:
GDB does not understand Go programs well. The stack management, threading, and runtime contain aspects that differ enough from the execution model GDB expects that they can confuse the debugger, even when the program is compiled with gccgo. As a consequence, although GDB can be useful in some situations, it is not a reliable debugger for Go programs, particularly heavily concurrent ones. Moreover, it is not a priority for the Go project to address these issues, which are difficult. In short, the instructions below should be taken only as a guide to how to use GDB when it works, not as a guarantee of success.
Also check issue 7796
There's http://ernestmicklei.com/2012/12/14/hopwatch-a-debugging-tool-for-go/, which isn't like gdb, you have to add breakpoints yourself in the code.