~ % cat b.go
// You can edit this code!
// Click here and start typing.
package main

import "fmt"

func main() {
	fmt.Println("Hello, 世界")
}
~ % valgrind gccgo b.go
==23765== Memcheck, a memory error detector
==23765== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==23765== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==23765== Command: gccgo b.go
==23765==
==23765==
==23765== HEAP SUMMARY:
==23765==     in use at exit: 64,915 bytes in 177 blocks
==23765==   total heap usage: 351 allocs, 174 frees, 82,459 bytes allocated
==23765==
==23765== LEAK SUMMARY:
==23765==    definitely lost: 27,176 bytes in 108 blocks
==23765==    indirectly lost: 82 bytes in 5 blocks
==23765==      possibly lost: 0 bytes in 0 blocks
==23765==    still reachable: 37,657 bytes in 64 blocks
==23765==         suppressed: 0 bytes in 0 blocks
==23765== Rerun with --leak-check=full to see details of leaked memory
==23765==
==23765== For counts of detected and suppressed errors, rerun with: -v
==23765== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)