(congrats for the new forum!)
duplicacy check -all
Storage set to sftp://xxx
Listing all chunks
All chunks referenced by snapshot xxx at revision 1 exist
All chunks referenced by snapshot xxx at revision 2 exist
[...]
All chunks referenced by snapshot xxx at revision 60 exist
All chunks referenced by snapshot xxx at revision 61 exist
All chunks referenced by snapshot xxx at revision 62 exist
fatal error: out of memory
runtime stack:
runtime.throw(0x806431, 0xd)
/usr/local/go/src/runtime/panic.go:596 +0x70
runtime.(*mcache).refill(0x75f5e258, 0x17, 0x60ead0c0)
/usr/local/go/src/runtime/mcache.go:124 +0xf0
runtime.(*mcache).nextFree.func1()
/usr/local/go/src/runtime/malloc.go:526 +0x24
runtime.systemstack(0x10f18000)
/usr/local/go/src/runtime/asm_arm.s:264 +0x80
runtime.mstart()
/usr/local/go/src/runtime/proc.go:1132
goroutine 1 [running]:
runtime.systemstack_switch()
/usr/local/go/src/runtime/asm_arm.s:209 +0x4 fp=0x13cf252c sp=0x13cf2528
runtime.(*mcache).nextFree(0x75f5e258, 0x17, 0x5a98c, 0x60ead0c0, 0x40)
/usr/local/go/src/runtime/malloc.go:527 +0x9c fp=0x13cf2558 sp=0x13cf252 c
runtime.mallocgc(0x1c0, 0x7c8b60, 0x5a401, 0x40)
/usr/local/go/src/runtime/malloc.go:679 +0x8c0 fp=0x13cf25b4 sp=0x13cf25 58
runtime.newobject(0x7c8b60, 0x0)
/usr/local/go/src/runtime/malloc.go:808 +0x2c fp=0x13cf25c8 sp=0x13cf25b 4
github.com/gilbertchen/duplicacy/vendor/github.com/minio/blake2b-simd.New(0x13cf 2618, 0x60ead0c0, 0x5a3e8, 0x60ead0c0, 0x138188)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/git hub.com/minio/blake2b-simd/blake2b.go:117 +0x5c fp=0x13cf25dc sp=0x13cf25c8
github.com/gilbertchen/duplicacy/src.(*Config).NewKeyedHasher(0x10fc2360, 0x10fc 0460, 0x20, 0x20, 0x6021ed10, 0x60ead0c0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/src/duplic acy_config.go:238 +0x60 fp=0x13cf2644 sp=0x13cf25dc
github.com/gilbertchen/duplicacy/src.(*Config).GetChunkIDFromHash(0x10fc2360, 0x 3d3b6860, 0x20, 0x60ead0c0, 0x40)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/src/duplic acy_config.go:314 +0x34 fp=0x13cf266c sp=0x13cf2644
github.com/gilbertchen/duplicacy/src.(*SnapshotManager).GetSnapshotChunks(0x10fc 05e0, 0x31f60cf0, 0x0, 0x13cf28f0, 0x13cf2a14)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/src/duplic acy_snapshotmanager.go:628 +0x3e4 fp=0x13cf26d4 sp=0x13cf266c
github.com/gilbertchen/duplicacy/src.(*SnapshotManager).CheckSnapshots(0x10fc05e 0, 0x10fd6120, 0x8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/src/duplic acy_snapshotmanager.go:809 +0x7ec fp=0x13cf2c60 sp=0x13cf26d4
main.checkSnapshots(0x10fc98c0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/duplicacy/ duplicacy_main.go:890 +0x3d4 fp=0x13cf2d00 sp=0x13cf2c60
github.com/gilbertchen/duplicacy/vendor/github.com/gilbertchen/cli.Command.Run(0 x7fd830, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x818fc8, 0x20, 0x0, ...)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/git hub.com/gilbertchen/cli/command.go:160 +0x614 fp=0x13cf2eac sp=0x13cf2d00
github.com/gilbertchen/duplicacy/vendor/github.com/gilbertchen/cli.(*App).Run(0x 1100cf00, 0x10f0e280, 0x3, 0x4, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/git hub.com/gilbertchen/cli/app.go:179 +0x5e4 fp=0x13cf3134 sp=0x13cf2eac
main.main()
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/duplicacy/ duplicacy_main.go:1860 +0x3718 fp=0x13cf3fbc sp=0x13cf3134
runtime.main()
/usr/local/go/src/runtime/proc.go:185 +0x1e4 fp=0x13cf3fe4 sp=0x13cf3fbc
runtime.goexit()
/usr/local/go/src/runtime/asm_arm.s:1017 +0x4 fp=0x13cf3fe4 sp=0x13cf3fe 4
goroutine 5 [syscall, 131 minutes]:
os/signal.signal_recv(0x0)
/usr/local/go/src/runtime/sigqueue.go:116 +0x154
os/signal.loop()
/usr/local/go/src/os/signal/signal_unix.go:22 +0x14
created by os/signal.init.1
/usr/local/go/src/os/signal/signal_unix.go:28 +0x30
goroutine 20 [IO wait, 4 minutes]:
net.runtime_pollWait(0x75f02f70, 0x72, 0x110f4000)
/usr/local/go/src/runtime/netpoll.go:164 +0x44
net.(*pollDesc).wait(0x110b4fbc, 0x72, 0xc42b70, 0xc40164)
/usr/local/go/src/net/fd_poll_runtime.go:75 +0x28
net.(*pollDesc).waitRead(0x110b4fbc, 0x110f4000, 0x1000)
/usr/local/go/src/net/fd_poll_runtime.go:80 +0x24
net.(*netFD).Read(0x110b4f80, 0x110f4000, 0x1000, 0x1000, 0x0, 0xc42b70, 0xc4016 4)
/usr/local/go/src/net/fd_unix.go:250 +0x148
net.(*conn).Read(0x10fcce48, 0x110f4000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
/usr/local/go/src/net/net.go:181 +0x58
bufio.(*Reader).Read(0x11018810, 0x110aca31, 0x5, 0x5, 0x862bbf36, 0x123748af, 0 x5057cf59)
/usr/local/go/src/bufio/bufio.go:213 +0x280
io.ReadAtLeast(0xc40e90, 0x11018810, 0x110aca31, 0x5, 0x5, 0x5, 0x0, 0x1, 0x0)
/usr/local/go/src/io/io.go:307 +0x8c
io.ReadFull(0xc40e90, 0x11018810, 0x110aca31, 0x5, 0x5, 0x10f22500, 0x75f5e258, 0x0)
/usr/local/go/src/io/io.go:325 +0x40
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*streamPacketCi pher).readPacket(0x110aca20, 0x1c04, 0xc40e90, 0x11018810, 0x110b51f0, 0x1, 0x0, 0x14a01, 0x1)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/cipher.go:150 +0x48
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*connectionStat e).readPacket(0x10fc9b90, 0x11018810, 0x10f1bf8c, 0x25, 0x25, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/transport.go:129 +0x40
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*transport).rea dPacket(0x10fc9b90, 0x124b40f0, 0x25, 0x25, 0x0, 0x110b51f0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/transport.go:113 +0x24
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*handshakeTrans port).readOnePacket(0x10fd9800, 0x110b5100, 0x10f1bfd8, 0x25, 0x25, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/handshake.go:374 +0x28
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*handshakeTrans port).readLoop(0x10fd9800)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/handshake.go:197 +0x24
created by github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.newCl ientTransport
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/handshake.go:134 +0x138
goroutine 18 [select, 131 minutes, locked to thread]:
runtime.gopark(0x836534, 0x0, 0x7ff0d9, 0x6, 0x18, 0x2)
/usr/local/go/src/runtime/proc.go:271 +0xfc
runtime.selectgoImpl(0x10f1afa0, 0x0, 0xc)
/usr/local/go/src/runtime/select.go:423 +0x116c
runtime.selectgo(0x10f1afa0)
/usr/local/go/src/runtime/select.go:238 +0x10
runtime.ensureSigM.func1()
/usr/local/go/src/runtime/signal_unix.go:434 +0x2bc
runtime.goexit()
/usr/local/go/src/runtime/asm_arm.s:1017 +0x4
goroutine 19 [chan receive, 131 minutes]:
main.main.func1(0x110b4d00)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/duplicacy/ duplicacy_main.go:1854 +0x38
created by main.main
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/duplicacy/ duplicacy_main.go:1858 +0x36e8
goroutine 21 [select, 131 minutes]:
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*handshakeTrans port).kexLoop(0x10fd9800)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/handshake.go:268 +0x768
created by github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.newCl ientTransport
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/handshake.go:135 +0x154
goroutine 10 [chan receive, 4 minutes]:
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*handshakeTrans port).readPacket(0x10fd9800, 0x124b40f0, 0x25, 0x25, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/handshake.go:187 +0x44
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*mux).onePacket (0x10f17180, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/mux.go:215 +0x28
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*mux).loop(0x10 f17180)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/mux.go:190 +0x34
created by github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.newMu x
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/mux.go:128 +0x18c
goroutine 11 [chan receive, 131 minutes]:
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*Client).handle GlobalRequests(0x10f105d0, 0x10f17100)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/client.go:138 +0x34
created by github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.NewCl ient
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/client.go:57 +0xbc
goroutine 12 [chan receive, 131 minutes]:
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*Client).handle ChannelOpens(0x10f105d0, 0x10f17080)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/client.go:147 +0x38
created by github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.NewCl ient
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/client.go:58 +0xe0
goroutine 13 [semacquire, 131 minutes]:
sync.runtime_notifyListWait(0x10f0f888, 0x0)
/usr/local/go/src/runtime/sema.go:298 +0x138
sync.(*Cond).Wait(0x10f0f880)
/usr/local/go/src/sync/cond.go:57 +0x78
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*mux).Wait(0x10 f17180, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/mux.go:110 +0x8c
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.NewClient.func1( 0x10f105d0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/client.go:60 +0x28
created by github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.NewCl ient
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/client.go:62 +0xfc
goroutine 14 [chan receive, 131 minutes]:
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*forwardList).h andleChannels(0x10f105d8, 0x10f171c0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/tcpip.go:186 +0x38
created by github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.NewCl ient
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/client.go:63 +0x144
goroutine 15 [chan receive, 131 minutes]:
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*forwardList).h andleChannels(0x10f105d8, 0x10f17200)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/tcpip.go:186 +0x38
created by github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.NewCl ient
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/client.go:64 +0x184
goroutine 16 [chan receive, 131 minutes]:
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*Session).wait( 0x10f783c0, 0x10f17240, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/session.go:423 +0x48
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.newSession.func1 (0x10f783c0, 0x10f17240)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/session.go:593 +0x24
created by github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.newSe ssion
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/session.go:594 +0xa8
goroutine 33 [semacquire, 4 minutes]:
sync.runtime_notifyListWait(0x10f0f8e8, 0x152d)
/usr/local/go/src/runtime/sema.go:298 +0x138
sync.(*Cond).Wait(0x10f0f8e0)
/usr/local/go/src/sync/cond.go:57 +0x78
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*buffer).Read(0 x10f8fd40, 0x10f8f9c8, 0x4, 0x4, 0x0, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/buffer.go:94 +0x124
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*channel).ReadE xtended(0x10f5c680, 0x10f8f9c8, 0x4, 0x4, 0x0, 0x18, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/channel.go:351 +0x1a8
github.com/gilbertchen/duplicacy/vendor/golang.org/x/crypto/ssh.(*channel).Read( 0x10f5c680, 0x10f8f9c8, 0x4, 0x4, 0x18, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/gol ang.org/x/crypto/ssh/channel.go:528 +0x48
github.com/gilbertchen/duplicacy/vendor/github.com/pkg/sftp.(*conn).Read(0x110b5 e40, 0x10f8f9c8, 0x4, 0x4, 0x1d6f0, 0x1fac3930, 0x0)
<autogenerated>:1 +0x64
io.ReadAtLeast(0xc41400, 0x110b5e40, 0x10f8f9c8, 0x4, 0x4, 0x4, 0x6fe518, 0x1, 0 x10f8f9c8)
/usr/local/go/src/io/io.go:307 +0x8c
io.ReadFull(0xc41400, 0x110b5e40, 0x10f8f9c8, 0x4, 0x4, 0x18, 0x0, 0x0)
/usr/local/go/src/io/io.go:325 +0x40
github.com/gilbertchen/duplicacy/vendor/github.com/pkg/sftp.recvPacket(0xc41400, 0x110b5e40, 0x6f0fa8, 0x1fac3900, 0x10f3afbc, 0x1, 0x5ef924, 0x1)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/git hub.com/pkg/sftp/packet.go:143 +0x7c
github.com/gilbertchen/duplicacy/vendor/github.com/pkg/sftp.(*conn).recvPacket(0 x110b5e40, 0x1fac3900, 0x10f3afbc, 0x110221f0, 0x1, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/git hub.com/pkg/sftp/conn.go:22 +0x24
github.com/gilbertchen/duplicacy/vendor/github.com/pkg/sftp.(*clientConn).recv(0 x110b5e40, 0x0, 0x0)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/git hub.com/pkg/sftp/conn.go:64 +0x50
github.com/gilbertchen/duplicacy/vendor/github.com/pkg/sftp.(*clientConn).loop(0 x110b5e40)
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/git hub.com/pkg/sftp/conn.go:49 +0x48
created by github.com/gilbertchen/duplicacy/vendor/github.com/pkg/sftp.NewClient Pipe
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/vendor/git hub.com/pkg/sftp/client.go:97 +0x1a8
goroutine 24 [select, 4 minutes]:
github.com/gilbertchen/duplicacy/src.CreateChunkDownloader.func1(0x12dcc240, 0x0 )
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/src/duplic acy_chunkdownloader.go:80 +0x114
created by github.com/gilbertchen/duplicacy/src.CreateChunkDownloader
/Users/chgang/zincbox/go/src/github.com/gilbertchen/duplicacy/src/duplic acy_chunkdownloader.go:87 +0x240
I check my backups on a weekly bases. How can I make sure that it does not runs out of memory?
System is a QNAP NAS with 1GB Ram.
you can clearly see when the check started an ended 
button on posts that you found useful.
box under the post. 