Problem replicating benchmark - signal SIGFPE: floating-point exception

[Brandl]

Hello,

I'm trying to replicate your studyresults on my own thesis and I came across this problem.

First some background, I'm running this on the cloud of a german provider (Hetzner) and to run it on Ubuntu 16.04 I've executed the following steps:

    apt-get update;
    apt-get install git make g++ libssl-dev libgmp3-dev libboost-all-dev libtool libtool-bin;
    wget http://www.shoup.net/ntl/ntl-9.8.1.tar.gz;
    gunzip ntl-9.8.1.tar.gz;
    tar xf ntl-9.8.1.tar;
    cd ntl-9.8.1/src;
    ./configure NTL_THREADS=on NTL_GMP_LIP=on NTL_THREAD_BOOST=on SHARED=on;
    make;
    make install;
    export LD_LIBRARY_PATH=/usr/local/lib/:\$LD_LIBRARY_PATH;
    cd /tmp;
    wget https://dl.google.com/go/go1.15.1.linux-amd64.tar.gz;
    tar -xvf go1.15.1.linux-amd64.tar.gz;
    mv go /usr/local;
    export PATH=$PATH:$HOME/.local/bin:$HOME/bin:/usr/local/go/bin:$HOME/go/bin;
    export GOPATH=$HOME/go;
    mkdir -p $GOPATH/src;
    cd $GOPATH/src;
    git clone https://github.com/nirvantyagi/stadium.git;
    cd stadium/groth;
    make clean; make lib;
    export LD_LIBRARY_PATH=/usr/local/lib/:$HOME/go/src/stadium/groth;
    cd stadium/groth/;
    chmod +x libshuffle.so;
    sudo cp libshuffle.so /usr/local/lib/;
    export CGO_CXXFLAGS_ALLOW=".*"; 
    export CGO_LDFLAGS_ALLOW=".*";
    export CGO_CFLAGS_ALLOW=".*";
    go get stadium/groth stadium/stadium stadium/coordinator stadium/server;
    go install stadium/groth stadium/stadium stadium/coordinator stadium/server;

Running make test and ./test goes without error but as soon as I try the 3-server example I run into this:

server -conf config/three-server.conf -id 1
INFO[0000] Initializing Server                           chainlen=3 id=1 messages=10000 servernum=3
2020/10/14 01:13:30 rpc.Register: method "DestWrap" has 7 input parameters; needs exactly three
2020/10/14 01:13:30 rpc.Register: reply type of method "InitServer" is not a pointer: "stadium.Config"
2020/10/14 01:13:30 rpc.Register: method "SetupConnections" has 2 input parameters; needs exactly three
2020/10/14 01:13:30 rpc.Register: method "Unwrap" has 4 input parameters; needs exactly three
2020/10/14 01:13:30 rpc.Register: method "Wrap" has 4 input parameters; needs exactly three
INFO[0030] Setting up server connections...              id=1 num-servers=3
INFO[0030] Connection setup successful.                 
INFO[0030] Server received Prepare from Coordinator      id=1
INFO[0030] Creating message batch...                    
fatal error: unexpected signal during runtime execution
[signal SIGFPE: floating-point exception code=0x1 addr=0x7f9402e7422c pc=0x7f9402e7422c]

runtime stack:
runtime.throw(0x75f76f, 0x2a)
	/usr/local/go/src/runtime/panic.go:1116 +0x72
runtime.sigpanic()
	/usr/local/go/src/runtime/signal_unix.go:704 +0x4ac

goroutine 10 [syscall]:
runtime.cgocall(0x6c3e90, 0xc00009f4c0, 0xc0001a6008)
	/usr/local/go/src/runtime/cgocall.go:133 +0x5b fp=0xc00009f490 sp=0xc00009f458 pc=0x40613b
stadium/groth._Cfunc_get_ciphertexts(0x279dff0, 0xc0001a6004, 0xc0001a6008, 0x0)
	_cgo_gotypes.go:301 +0x4e fp=0xc00009f4c0 sp=0xc00009f490 pc=0x6a538e
stadium/groth.__encrypt_proven.func7(0x279dff0, 0xc0001a6004, 0xc0001a6008, 0x0)
	/root/go/src/stadium/groth/interface.go:104 +0xcb fp=0xc00009f4f0 sp=0xc00009f4c0 pc=0x6a86eb
stadium/groth.__encrypt_proven(0xc000200000, 0x13880, 0x23ff8, 0x8, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	/root/go/src/stadium/groth/interface.go:104 +0x2a9 fp=0xc00009f5b8 sp=0xc00009f4f0 pc=0x6a68c9
stadium/groth.Groth.EncryptProven(0xc000200000, 0x13880, 0x23ff8, 0x8, 0x1, 0x8, 0x593465, 0x6ce7fa, 0xa, 0x7bb7c0, ...)
	/root/go/src/stadium/groth/interface.go:72 +0x79 fp=0xc00009f688 sp=0xc00009f5b8 pc=0x6a6499
stadium/stadium.(*VZServer).Prepare(0xc0000de000, 0xc0000169ab, 0x0, 0x0)
	/root/go/src/stadium/stadium/server.go:191 +0x32b fp=0xc00009fbe0 sp=0xc00009f688 pc=0x6b60eb
runtime.call32(0xc0000db1a0, 0xc000010688, 0xc00000f680, 0x1000000020)
	/usr/local/go/src/runtime/asm_amd64.s:540 +0x3e fp=0xc00009fc10 sp=0xc00009fbe0 pc=0x46a83e
reflect.Value.call(0xc0000534a0, 0xc000010688, 0x13, 0x74cdb9, 0x4, 0xc000041f08, 0x3, 0x3, 0x40, 0x38, ...)
	/usr/local/go/src/reflect/value.go:475 +0x8c7 fp=0xc00009fe28 sp=0xc00009fc10 pc=0x498a67
reflect.Value.Call(0xc0000534a0, 0xc000010688, 0x13, 0xc000030708, 0x3, 0x3, 0x7f940348bd40, 0xc0000168b0, 0xb73e40)
	/usr/local/go/src/reflect/value.go:336 +0xb9 fp=0xc00009fea8 sp=0xc00009fe28 pc=0x497f59
net/rpc.(*service).call(0xc000051b40, 0xc000012230, 0xc000016850, 0xc000016860, 0xc0000cc500, 0xc00000f260, 0x702560, 0xba3a88, 0x199, 0x6e2f00, ...)
	/usr/local/go/src/net/rpc/server.go:377 +0x189 fp=0xc00009ff70 sp=0xc00009fea8 pc=0x695a09
runtime.goexit()
	/usr/local/go/src/runtime/asm_amd64.s:1374 +0x1 fp=0xc00009ff78 sp=0xc00009ff70 pc=0x46c261
created by net/rpc.(*Server).ServeCodec
	/usr/local/go/src/net/rpc/server.go:474 +0x445

goroutine 1 [IO wait]:
internal/poll.runtime_pollWait(0x7f940330d058, 0x72, 0x0)
	/usr/local/go/src/runtime/netpoll.go:220 +0x55
internal/poll.(*pollDesc).wait(0xc0000cc998, 0x72, 0x0, 0x0, 0x74f2dd)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:87 +0x45
internal/poll.(*pollDesc).waitRead(...)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Accept(0xc0000cc980, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:394 +0x1fc
net.(*netFD).accept(0xc0000cc980, 0x70b4a0, 0x73e760, 0x7f9403310218)
	/usr/local/go/src/net/fd_unix.go:172 +0x45
net.(*TCPListener).accept(0xc00000f240, 0xc0000d9bb0, 0xc0000d9bb8, 0x18)
	/usr/local/go/src/net/tcpsock_posix.go:139 +0x32
net.(*TCPListener).Accept(0xc00000f240, 0x76a6b8, 0xc000012230, 0x7f9403310218, 0xc0000107b8)
	/usr/local/go/src/net/tcpsock.go:261 +0x65
net/rpc.(*Server).Accept(0xc000012230, 0x7b6540, 0xc00000f240)
	/usr/local/go/src/net/rpc/server.go:625 +0x69
net/rpc.Accept(...)
	/usr/local/go/src/net/rpc/server.go:685
main.main()
	/root/go/src/stadium/server/main.go:76 +0x345

goroutine 7 [IO wait]:
internal/poll.runtime_pollWait(0x7f940330cf78, 0x72, 0x7b2680)
	/usr/local/go/src/runtime/netpoll.go:220 +0x55
internal/poll.(*pollDesc).wait(0xc0000cca18, 0x72, 0xc0000f9000, 0x1000, 0x1000)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:87 +0x45
internal/poll.(*pollDesc).waitRead(...)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Read(0xc0000cca00, 0xc0000f9000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:159 +0x1b1
net.(*netFD).Read(0xc0000cca00, 0xc0000f9000, 0x1000, 0x1000, 0x203000, 0x203000, 0x203000)
	/usr/local/go/src/net/fd_posix.go:55 +0x4f
net.(*conn).Read(0xc0000107a8, 0xc0000f9000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:182 +0x8e
bufio.(*Reader).Read(0xc0000538c0, 0xc000016840, 0x1, 0x9, 0x0, 0x0, 0x0)
	/usr/local/go/src/bufio/bufio.go:227 +0x222
io.ReadAtLeast(0x7b1a40, 0xc0000538c0, 0xc000016840, 0x1, 0x9, 0x1, 0x0, 0xc0000d5b18, 0x769de8)
	/usr/local/go/src/io/io.go:314 +0x87
io.ReadFull(...)
	/usr/local/go/src/io/io.go:333
encoding/gob.decodeUintReader(0x7b1a40, 0xc0000538c0, 0xc000016840, 0x9, 0x9, 0x203000, 0xba3a88, 0x5906cb, 0xc0000d5b78)
	/usr/local/go/src/encoding/gob/decode.go:120 +0x6f
encoding/gob.(*Decoder).recvMessage(0xc0000cca80, 0x40fe70)
	/usr/local/go/src/encoding/gob/decoder.go:81 +0x57
encoding/gob.(*Decoder).decodeTypeSequence(0xc0000cca80, 0x71db00, 0x199)
	/usr/local/go/src/encoding/gob/decoder.go:143 +0x10d
encoding/gob.(*Decoder).DecodeValue(0xc0000cca80, 0x6e1200, 0xc00000f640, 0x16, 0x0, 0x0)
	/usr/local/go/src/encoding/gob/decoder.go:211 +0xdc
encoding/gob.(*Decoder).Decode(0xc0000cca80, 0x6e1200, 0xc00000f640, 0x1ed60, 0xc000012258)
	/usr/local/go/src/encoding/gob/decoder.go:188 +0x173
net/rpc.(*gobServerCodec).ReadRequestHeader(0xc0000dac30, 0xc00000f640, 0x6e2f00, 0xc0000cca80)
	/usr/local/go/src/net/rpc/server.go:397 +0x45
net/rpc.(*Server).readRequestHeader(0xc000012230, 0x7b7240, 0xc0000dac30, 0xc0000169ab, 0x16, 0x199, 0x203001, 0x0, 0x0)
	/usr/local/go/src/net/rpc/server.go:583 +0x6c
net/rpc.(*Server).readRequest(0xc000012230, 0x7b7240, 0xc0000dac30, 0xc000012230, 0xc000016850, 0xc000016860, 0xc0000cc500, 0xc00000f260, 0x702560, 0xba3a88, ...)
	/usr/local/go/src/net/rpc/server.go:543 +0x5a
net/rpc.(*Server).ServeCodec(0xc000012230, 0x7b7240, 0xc0000dac30)
	/usr/local/go/src/net/rpc/server.go:458 +0x9d
net/rpc.(*Server).ServeConn(0xc000012230, 0x7f9403310218, 0xc0000107a8)
	/usr/local/go/src/net/rpc/server.go:449 +0x165
created by net/rpc.(*Server).Accept
	/usr/local/go/src/net/rpc/server.go:630 +0x55

goroutine 8 [IO wait]:
internal/poll.runtime_pollWait(0x7f940330ce98, 0x72, 0x7b2680)
	/usr/local/go/src/runtime/netpoll.go:220 +0x55
internal/poll.(*pollDesc).wait(0xc0000ccb18, 0x72, 0xc0000fb000, 0x1000, 0x1000)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:87 +0x45
internal/poll.(*pollDesc).waitRead(...)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Read(0xc0000ccb00, 0xc0000fb000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:159 +0x1b1
net.(*netFD).Read(0xc0000ccb00, 0xc0000fb000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/fd_posix.go:55 +0x4f
net.(*conn).Read(0xc0000107b0, 0xc0000fb000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:182 +0x8e
bufio.(*Reader).Read(0xc000053980, 0xc000016870, 0x1, 0x9, 0x0, 0x0, 0x0)
	/usr/local/go/src/bufio/bufio.go:227 +0x222
io.ReadAtLeast(0x7b1a40, 0xc000053980, 0xc000016870, 0x1, 0x9, 0x1, 0x0, 0x0, 0x0)
	/usr/local/go/src/io/io.go:314 +0x87
io.ReadFull(...)
	/usr/local/go/src/io/io.go:333
encoding/gob.decodeUintReader(0x7b1a40, 0xc000053980, 0xc000016870, 0x9, 0x9, 0x203000, 0x0, 0x0, 0x0)
	/usr/local/go/src/encoding/gob/decode.go:120 +0x6f
encoding/gob.(*Decoder).recvMessage(0xc0000ccb80, 0x40fe70)
	/usr/local/go/src/encoding/gob/decoder.go:81 +0x57
encoding/gob.(*Decoder).decodeTypeSequence(0xc0000ccb80, 0x71db00, 0x0)
	/usr/local/go/src/encoding/gob/decoder.go:143 +0x10d
encoding/gob.(*Decoder).DecodeValue(0xc0000ccb80, 0x6e1200, 0xc00000f280, 0x16, 0x0, 0x0)
	/usr/local/go/src/encoding/gob/decoder.go:211 +0xdc
encoding/gob.(*Decoder).Decode(0xc0000ccb80, 0x6e1200, 0xc00000f280, 0x0, 0xc000012258)
	/usr/local/go/src/encoding/gob/decoder.go:188 +0x173
net/rpc.(*gobServerCodec).ReadRequestHeader(0xc0000dad80, 0xc00000f280, 0x0, 0x0)
	/usr/local/go/src/net/rpc/server.go:397 +0x45
net/rpc.(*Server).readRequestHeader(0xc000012230, 0x7b7240, 0xc0000dad80, 0x40fe70, 0x41b1be, 0x203000, 0x203000, 0x203000, 0x7f940348b878)
	/usr/local/go/src/net/rpc/server.go:583 +0x6c
net/rpc.(*Server).readRequest(0xc000012230, 0x7b7240, 0xc0000dad80, 0x40fe70, 0xc000051cc0, 0x40, 0x38, 0x730440, 0xc000030720, 0x40fe70, ...)
	/usr/local/go/src/net/rpc/server.go:543 +0x5a
net/rpc.(*Server).ServeCodec(0xc000012230, 0x7b7240, 0xc0000dad80)
	/usr/local/go/src/net/rpc/server.go:458 +0x9d
net/rpc.(*Server).ServeConn(0xc000012230, 0x7f9403310218, 0xc0000107b0)
	/usr/local/go/src/net/rpc/server.go:449 +0x165
created by net/rpc.(*Server).Accept
	/usr/local/go/src/net/rpc/server.go:630 +0x55

goroutine 9 [IO wait]:
internal/poll.runtime_pollWait(0x7f940330cdb8, 0x72, 0x7b2680)
	/usr/local/go/src/runtime/netpoll.go:220 +0x55
internal/poll.(*pollDesc).wait(0xc0000ccc18, 0x72, 0xc0000fd000, 0x1000, 0x1000)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:87 +0x45
internal/poll.(*pollDesc).waitRead(...)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Read(0xc0000ccc00, 0xc0000fd000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:159 +0x1b1
net.(*netFD).Read(0xc0000ccc00, 0xc0000fd000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/fd_posix.go:55 +0x4f
net.(*conn).Read(0xc0000107b8, 0xc0000fd000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:182 +0x8e
bufio.(*Reader).Read(0xc000053a40, 0xc000016890, 0x1, 0x9, 0x0, 0x0, 0x0)
	/usr/local/go/src/bufio/bufio.go:227 +0x222
io.ReadAtLeast(0x7b1a40, 0xc000053a40, 0xc000016890, 0x1, 0x9, 0x1, 0x0, 0x0, 0x0)
	/usr/local/go/src/io/io.go:314 +0x87
io.ReadFull(...)
	/usr/local/go/src/io/io.go:333
encoding/gob.decodeUintReader(0x7b1a40, 0xc000053a40, 0xc000016890, 0x9, 0x9, 0x203000, 0x0, 0x0, 0x0)
	/usr/local/go/src/encoding/gob/decode.go:120 +0x6f
encoding/gob.(*Decoder).recvMessage(0xc0000ccd00, 0x40fe70)
	/usr/local/go/src/encoding/gob/decoder.go:81 +0x57
encoding/gob.(*Decoder).decodeTypeSequence(0xc0000ccd00, 0x71db00, 0x0)
	/usr/local/go/src/encoding/gob/decoder.go:143 +0x10d
encoding/gob.(*Decoder).DecodeValue(0xc0000ccd00, 0x6e1200, 0xc00000f2a0, 0x16, 0x0, 0x0)
	/usr/local/go/src/encoding/gob/decoder.go:211 +0xdc
encoding/gob.(*Decoder).Decode(0xc0000ccd00, 0x6e1200, 0xc00000f2a0, 0x0, 0xc000012258)
	/usr/local/go/src/encoding/gob/decoder.go:188 +0x173
net/rpc.(*gobServerCodec).ReadRequestHeader(0xc0000daed0, 0xc00000f2a0, 0x0, 0x0)
	/usr/local/go/src/net/rpc/server.go:397 +0x45
net/rpc.(*Server).readRequestHeader(0xc000012230, 0x7b7240, 0xc0000daed0, 0x40fe70, 0x41b1be, 0x203000, 0x203000, 0x203000, 0x7f94033125c0)
	/usr/local/go/src/net/rpc/server.go:583 +0x6c
net/rpc.(*Server).readRequest(0xc000012230, 0x7b7240, 0xc0000daed0, 0x40fe70, 0xc000051d40, 0x40, 0x38, 0x730440, 0xc000030720, 0x40fe70, ...)
	/usr/local/go/src/net/rpc/server.go:543 +0x5a
net/rpc.(*Server).ServeCodec(0xc000012230, 0x7b7240, 0xc0000daed0)
	/usr/local/go/src/net/rpc/server.go:458 +0x9d
net/rpc.(*Server).ServeConn(0xc000012230, 0x7f9403310218, 0xc0000107b8)
	/usr/local/go/src/net/rpc/server.go:449 +0x165
created by net/rpc.(*Server).Accept
	/usr/local/go/src/net/rpc/server.go:630 +0x55

goroutine 12 [IO wait]:
internal/poll.runtime_pollWait(0x7f940330ccd8, 0x72, 0x7b2680)
	/usr/local/go/src/runtime/netpoll.go:220 +0x55
internal/poll.(*pollDesc).wait(0xc0000cce18, 0x72, 0xc000121000, 0x1000, 0x1000)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:87 +0x45
internal/poll.(*pollDesc).waitRead(...)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Read(0xc0000cce00, 0xc000121000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:159 +0x1b1
net.(*netFD).Read(0xc0000cce00, 0xc000121000, 0x1000, 0x1000, 0x0, 0x0, 0x492ff3)
	/usr/local/go/src/net/fd_posix.go:55 +0x4f
net.(*conn).Read(0xc000010908, 0xc000121000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:182 +0x8e
bufio.(*Reader).Read(0xc000053ce0, 0xc000016d30, 0x1, 0x9, 0x0, 0x0, 0x0)
	/usr/local/go/src/bufio/bufio.go:227 +0x222
io.ReadAtLeast(0x7b1a40, 0xc000053ce0, 0xc000016d30, 0x1, 0x9, 0x1, 0x418c3b, 0x7f93dacb3e00, 0x100)
	/usr/local/go/src/io/io.go:314 +0x87
io.ReadFull(...)
	/usr/local/go/src/io/io.go:333
encoding/gob.decodeUintReader(0x7b1a40, 0xc000053ce0, 0xc000016d30, 0x9, 0x9, 0x7b7240, 0x203000, 0x40fe70, 0xc000010688)
	/usr/local/go/src/encoding/gob/decode.go:120 +0x6f
encoding/gob.(*Decoder).recvMessage(0xc0000cce80, 0xc000030708)
	/usr/local/go/src/encoding/gob/decoder.go:81 +0x57
encoding/gob.(*Decoder).decodeTypeSequence(0xc0000cce80, 0xc000016800, 0xc000030658)
	/usr/local/go/src/encoding/gob/decoder.go:143 +0x10d
encoding/gob.(*Decoder).DecodeValue(0xc0000cce80, 0x6e1240, 0xc0000db920, 0x16, 0x0, 0x0)
	/usr/local/go/src/encoding/gob/decoder.go:211 +0xdc
encoding/gob.(*Decoder).Decode(0xc0000cce80, 0x6e1240, 0xc0000db920, 0x730401, 0xc0000db920)
	/usr/local/go/src/encoding/gob/decoder.go:188 +0x173
net/rpc.(*gobClientCodec).ReadResponseHeader(0xc0000db830, 0xc0000db920, 0x56d079, 0x7b7080)
	/usr/local/go/src/net/rpc/client.go:228 +0x45
net/rpc.(*Client).input(0xc000053da0)
	/usr/local/go/src/net/rpc/client.go:109 +0xa8
created by net/rpc.NewClientWithCodec
	/usr/local/go/src/net/rpc/client.go:206 +0x89

goroutine 14 [IO wait]:
internal/poll.runtime_pollWait(0x7f940330cbf8, 0x72, 0x7b2680)
	/usr/local/go/src/runtime/netpoll.go:220 +0x55
internal/poll.(*pollDesc).wait(0xc0000ccf98, 0x72, 0xc000125000, 0x1000, 0x1000)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:87 +0x45
internal/poll.(*pollDesc).waitRead(...)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Read(0xc0000ccf80, 0xc000125000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:159 +0x1b1
net.(*netFD).Read(0xc0000ccf80, 0xc000125000, 0x1000, 0x1000, 0x0, 0x0, 0x492ff3)
	/usr/local/go/src/net/fd_posix.go:55 +0x4f
net.(*conn).Read(0xc000010918, 0xc000125000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:182 +0x8e
bufio.(*Reader).Read(0xc000053e60, 0xc000016d70, 0x1, 0x9, 0x0, 0x0, 0x0)
	/usr/local/go/src/bufio/bufio.go:227 +0x222
io.ReadAtLeast(0x7b1a40, 0xc000053e60, 0xc000016d70, 0x1, 0x9, 0x1, 0x418c3b, 0x7f93dacb3e00, 0x100)
	/usr/local/go/src/io/io.go:314 +0x87
io.ReadFull(...)
	/usr/local/go/src/io/io.go:333
encoding/gob.decodeUintReader(0x7b1a40, 0xc000053e60, 0xc000016d70, 0x9, 0x9, 0x7b7240, 0x203000, 0x40fe70, 0xc000010688)
	/usr/local/go/src/encoding/gob/decode.go:120 +0x6f
encoding/gob.(*Decoder).recvMessage(0xc0000cd000, 0xc000030708)
	/usr/local/go/src/encoding/gob/decoder.go:81 +0x57
encoding/gob.(*Decoder).decodeTypeSequence(0xc0000cd000, 0xc000016800, 0xc000030658)
	/usr/local/go/src/encoding/gob/decoder.go:143 +0x10d
encoding/gob.(*Decoder).DecodeValue(0xc0000cd000, 0x6e1240, 0xc0000dbbc0, 0x16, 0x0, 0x0)
	/usr/local/go/src/encoding/gob/decoder.go:211 +0xdc
encoding/gob.(*Decoder).Decode(0xc0000cd000, 0x6e1240, 0xc0000dbbc0, 0x730401, 0xc0000dbbc0)
	/usr/local/go/src/encoding/gob/decoder.go:188 +0x173
net/rpc.(*gobClientCodec).ReadResponseHeader(0xc0000dba70, 0xc0000dbbc0, 0x56d079, 0x7b7080)
	/usr/local/go/src/net/rpc/client.go:228 +0x45
net/rpc.(*Client).input(0xc000053f20)
	/usr/local/go/src/net/rpc/client.go:109 +0xa8
created by net/rpc.NewClientWithCodec
	/usr/local/go/src/net/rpc/client.go:206 +0x89

[derbear]

If you go to the groth/ subdirectory, does go test work?

[Brandl]

waiting for everyone...
shuffling 4160 messages
ecryption time: 1
parsing input
done parsing. 0
shuffle begins!
shuffle is done! In 0
proof is done! In 1
verification is done! In 0
Shuffle + prove + verify = 1
everything passed!
stress test is done in 2 seconds

[Brandl]

oh sorry that was ./test of course

[Brandl]

go test
EncryptProven took 1m2.106532413s
EncryptVerify took 52.216404712s
--- FAIL: TestEncryptVerified (153.00s)
    groth_test.go:68: failed to verify proof of knowledge
Going to shuffle 20032 elements
starting shuffle.
INFO[0156] inserted record                               record=0
Shuffle time:  1.383587008s
INFO[0156] invalidated record                            record=0 success=true
Proof time:  5.942287528s
Test complete: true . Total time:  9.707406363s
FAIL
exit status 1
FAIL	stadium/groth	162.836s

[derbear]

Does it work if you use an older version of go? Perhaps Go 1.7 or Go 1.8? (@nirvantyagi Do you remember what Go version this ran on?)

(Disclaimer: I haven't touched this code in a few years, and also I was a lot worse at Go then than I am now.)

[nirvantyagi]

Hmm good question. From timing of the project, I would think that it is 1.6 - 1.8. I would try 1.6 or 1.7 probably.

Since make test runs without error, it seems likely to be an issue with go/cgo 🤞

@Brandl - If you are able to try an older version of go, please let us know if you have any luck. We'll update the README accordingly.

Otherwise, I'll try to debug at some point, but I'm not sure when that will be.

[Brandl]

Thanks for the quick response!

Found it, was based on I guess some outdated libaries / ntl dependencies.
Since I already automated the deployment process brute-force-guessing it was rather easy 😄
Will submit a pull-request later this week.

[nirvantyagi]

Hi @Brandl, do you have a PR you'd like to submit or could you specify again what the issue with the build was? Thank you!