segfault with go 1.14.16

[dzufferey]

When trying to run it with go 1.14.6, I got the following.

$ ./run_paxos.sh 
running multi paxos with 3 servers and a client ...
make: Entering directory '/root/goolong'
make: Nothing to be done for 'all'.
make: Leaving directory '/root/goolong'
Starting.
node: waiting for connections
Starting.
node: waiting for connections
Starting.
node: waiting for connections
Starting.
node: waiting for connections
Replica id: 0. Done connecting.
Done starting.
Starting.
node: waiting for connections
Replica id: 1. Done connecting.
Done starting.
Caught signal; exiting
Starting.
node: waiting for connections
Replica id: 0. Done connecting.
Done starting.
Waiting for connections...
Caught signal; exiting
Caught signal; exiting
Connecting to replicas..
Error connecting to replica 0
Done connecting to 0
Error connecting to replica 1
Done connecting to 1
Error connecting to replica 2
Done connecting to 2
Connected to replicas: readers are [0xc000012300 0xc000012360 0xc0000123c0] .
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x47351c]

goroutine 1 [running]:
bufio.(*Writer).Flush(0xc00007e1c0, 0x55c180, 0xc00007e1c0)
        /usr/local/go/src/bufio/bufio.go:591 +0x5c
main.main()
        /root/goolong/src/client/client.go:103 +0xc58
DONE !

It still runs fine with go 1.13.14, so I'm currently using that version.