goversion: go1.4.2 linux/amd64
my benchmark crashes with below fatal error ,is this a bug ?

fatal error: evacuation not done in time

goroutine 299 [running]:
runtime.throw(0xa67392)
/usr/lib/golang/src/pkg/runtime/panic.c:520 +0x69 fp=0x7fae386eaac0 sp=0x7fae386eaaa8
hash_grow(0x701f00, 0xc20800f380)
/usr/lib/golang/src/pkg/runtime/hashmap.goc:333 +0x3a fp=0x7fae386eaaf0 sp=0x7fae386eaac0
hash_insert(0x701f00, 0xc20800f380, 0x7fae386eabfc, 0x7fae386eac08)
/usr/lib/golang/src/pkg/runtime/hashmap.goc:534 +0x3cd fp=0x7fae386eab88 sp=0x7fae386eaaf0
runtime.mapassign1(0x701f00, 0xc20800f380, 0x7fae386eabfc, 0x7fae386eac08)
/usr/lib/golang/src/pkg/runtime/hashmap.goc:933 +0x46 fp=0x7fae386eabb8 sp=0x7fae386eab88
kiteq/remoting/client.(*RemotingClient).Write(0xc2082a4540, 0x11000007cd, 0xc209c21680, 0x252, 0x280, 0x0, 0x0, 0x0, 0x0)
/home/zc/go-proj/src/kiteq/remoting/client/remoting_client.go:206 +0x127 fp=0x7fae386eac28 sp=0x7fae386eabb8

code at line 206 :

func (self *RemotingClient) Write(packet protocol.Packet) (chan interface{}, error) {

tid, future := self.fillOpaque(&packet)
self.lock.Lock()
defer self.lock.Unlock()

    delete(holder, tid)

206: holder[tid] = future
return future, self.remoteSession.Write(packet)
}