fatal error: runtime: out of memory

runtime stack:
runtime.throw(0x811020, 0x16)
        /usr/lib/go-1.6/src/runtime/panic.go:547 +0x90
runtime.sysMap(0xca22f30000, 0x202a40000, 0x433900, 0x9b0838)
        /usr/lib/go-1.6/src/runtime/mem_linux.go:206 +0x9b
runtime.(*mheap).sysAlloc(0x996e80, 0x202a40000, 0xc820000180)
        /usr/lib/go-1.6/src/runtime/malloc.go:429 +0x191
runtime.(*mheap).grow(0x996e80, 0x101520, 0x0)
        /usr/lib/go-1.6/src/runtime/mheap.go:651 +0x63
runtime.(*mheap).allocSpanLocked(0x996e80, 0x10151c, 0x1)
        /usr/lib/go-1.6/src/runtime/mheap.go:553 +0x4f6
runtime.(*mheap).alloc_m(0x996e80, 0x10151c, 0xffffff0100000000, 0x7f0686394e10)
        /usr/lib/go-1.6/src/runtime/mheap.go:437 +0x119
runtime.(*mheap).alloc.func1()
        /usr/lib/go-1.6/src/runtime/mheap.go:502 +0x41
runtime.systemstack(0x7f0686394e28)
        /usr/lib/go-1.6/src/runtime/asm_amd64.s:307 +0xab
runtime.(*mheap).alloc(0x996e80, 0x10151c, 0x10100000000, 0x20)
        /usr/lib/go-1.6/src/runtime/mheap.go:503 +0x63
runtime.largeAlloc(0x202a38000, 0xc800000001, 0xc8200478f8)
        /usr/lib/go-1.6/src/runtime/malloc.go:766 +0xb3
runtime.mallocgc.func3()
        /usr/lib/go-1.6/src/runtime/malloc.go:664 +0x33
runtime.systemstack(0xc8200e93c0)
        /usr/lib/go-1.6/src/runtime/asm_amd64.s:291 +0x79
runtime.mstart()
        /usr/lib/go-1.6/src/runtime/proc.go:1051

goroutine 1 [running]:
runtime.systemstack_switch()
        /usr/lib/go-1.6/src/runtime/asm_amd64.s:245 fp=0xc820047790 sp=0xc820047788
runtime.mallocgc(0x202a38000, 0x6cc720, 0xc800000001, 0xc92193c000)
        /usr/lib/go-1.6/src/runtime/malloc.go:665 +0x9eb fp=0xc820047868 sp=0xc820047790
runtime.newarray(0x6cc720, 0x202a38000, 0xc820047908)
        /usr/lib/go-1.6/src/runtime/malloc.go:798 +0xc9 fp=0xc8200478a8 sp=0xc820047868
runtime.makeslice(0x6beb80, 0x202a38000, 0x202a38000, 0x0, 0x0, 0x0)
        /usr/lib/go-1.6/src/runtime/slice.go:32 +0x165 fp=0xc8200478f8 sp=0xc8200478a8
bytes.makeSlice(0x202a38000, 0x0, 0x0, 0x0)
        /usr/lib/go-1.6/src/bytes/buffer.go:198 +0x64 fp=0xc820047948 sp=0xc8200478f8
bytes.(*Buffer).grow(0xc820210000, 0x8000, 0x8000)
        /usr/lib/go-1.6/src/bytes/buffer.go:106 +0x282 fp=0xc8200479f0 sp=0xc820047948
bytes.(*Buffer).Write(0xc820210000, 0xc8200fe000, 0x8000, 0x8000, 0xc820108018, 0x0, 0x0)
        /usr/lib/go-1.6/src/bytes/buffer.go:134 +0x4b fp=0xc820047a48 sp=0xc8200479f0
mime/multipart.(*part).Write(0xc8203782e0, 0xc8200fe000, 0x8000, 0x8000, 0x8000, 0x0, 0x0)
        /usr/lib/go-1.6/src/mime/multipart/writer.go:180 +0x15f fp=0xc820047ac0 sp=0xc820047a48
io.copyBuffer(0x7f0689b27798, 0xc8203782e0, 0x7f0689b17270, 0xc820108018, 0xc8200fe000, 0x8000, 0x8000, 0x101510000, 0x0, 0x0)
        /usr/lib/go-1.6/src/io/io.go:382 +0x2c9 fp=0xc820047b80 sp=0xc820047ac0
io.Copy(0x7f0689b27798, 0xc8203782e0, 0x7f0689b17270, 0xc820108018, 0x4, 0x0, 0x0)
        /usr/lib/go-1.6/src/io/io.go:350 +0x64 fp=0xc820047bd8 sp=0xc820047b80
main.newfileUploadRequest(0xc8201435aa, 0xe9, 0xc82034a000, 0x7c9ee0, 0x5, 0x7ffd764ba75c, 0x9, 0x0, 0x0, 0x0)
        /home/mercs213/megaup.go:32 +0x276 fp=0xc820047d48 sp=0xc820047bd8
main.main()
        /home/mercs213/megaup.go:81 +0x4f3 fp=0xc820047f60 sp=0xc820047d48
runtime.main()
        /usr/lib/go-1.6/src/runtime/proc.go:188 +0x2b0 fp=0xc820047fb0 sp=0xc820047f60
runtime.goexit()
        /usr/lib/go-1.6/src/runtime/asm_amd64.s:1998 +0x1 fp=0xc820047fb8 sp=0xc820047fb0

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
        /usr/lib/go-1.6/src/runtime/asm_amd64.s:1998 +0x1

goroutine 18 [IO wait]:
net.runtime_pollWait(0x7f0689b18630, 0x72, 0xc820436000)
        /usr/lib/go-1.6/src/runtime/netpoll.go:160 +0x60
net.(*pollDesc).Wait(0xc8201060d0, 0x72, 0x0, 0x0)
        /usr/lib/go-1.6/src/net/fd_poll_runtime.go:73 +0x3a
net.(*pollDesc).WaitRead(0xc8201060d0, 0x0, 0x0)
        /usr/lib/go-1.6/src/net/fd_poll_runtime.go:78 +0x36
net.(*netFD).Read(0xc820106070, 0xc820436000, 0x4000, 0x4000, 0x0, 0x7f0689b13050, 0xc82000e038)
        /usr/lib/go-1.6/src/net/fd_unix.go:250 +0x23a
net.(*conn).Read(0xc820038068, 0xc820436000, 0x4000, 0x4000, 0x0, 0x0, 0x0)
        /usr/lib/go-1.6/src/net/net.go:172 +0xe4
crypto/tls.(*block).readFromUntil(0xc820011770, 0x7f0689b18868, 0xc820038068, 0x5, 0x0, 0x0)
        /usr/lib/go-1.6/src/crypto/tls/conn.go:460 +0xcc
crypto/tls.(*Conn).readRecord(0xc820114000, 0x869517, 0x0, 0x0)
        /usr/lib/go-1.6/src/crypto/tls/conn.go:562 +0x2d1
crypto/tls.(*Conn).Read(0xc820114000, 0xc820170000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
        /usr/lib/go-1.6/src/crypto/tls/conn.go:939 +0x167
bufio.(*Reader).fill(0xc820348f60)
        /usr/lib/go-1.6/src/bufio/bufio.go:97 +0x1e9
bufio.(*Reader).Read(0xc820348f60, 0xc820356a88, 0x9, 0x9, 0x0, 0x0, 0x0)
        /usr/lib/go-1.6/src/bufio/bufio.go:207 +0x260
io.ReadAtLeast(0x7f0689b24e00, 0xc820348f60, 0xc820356a88, 0x9, 0x9, 0x9, 0x0, 0x0, 0x0)
        /usr/lib/go-1.6/src/io/io.go:297 +0xe6
io.ReadFull(0x7f0689b24e00, 0xc820348f60, 0xc820356a88, 0x9, 0x9, 0xc820016380, 0x0, 0x0)
        /usr/lib/go-1.6/src/io/io.go:315 +0x62
net/http.http2readFrameHeader(0xc820356a88, 0x9, 0x9, 0x7f0689b24e00, 0xc820348f60, 0x20000000, 0x0, 0x0, 0x0)
        /usr/lib/go-1.6/src/net/http/h2_bundle.go:715 +0xa5
net/http.(*http2Framer).ReadFrame(0xc820356a50, 0x0, 0x0, 0x0, 0x0)
        /usr/lib/go-1.6/src/net/http/h2_bundle.go:906 +0xe9
net/http.(*http2clientConnReadLoop).run(0xc82037c410, 0x0, 0x0)
        /usr/lib/go-1.6/src/net/http/h2_bundle.go:5583 +0xa6
net/http.(*http2ClientConn).readLoop(0xc820252f20)
        /usr/lib/go-1.6/src/net/http/h2_bundle.go:5544 +0x162
created by net/http.(*http2Transport).NewClientConn
        /usr/lib/go-1.6/src/net/http/h2_bundle.go:4975 +0xd94