ASan reported heap-buffer-overflow about raft HOT 1 CLOSED

I have tried to reproduce this without any success.

With raft checked out, I did:

$ export CFLAGS="-fsanitize=address -fsanitize=undefined -fno-optimize-sibling-calls -fno-omit-frame-pointer"
$ export LDFLAGS="-fsanitize=address -fsanitize=undefined"
$ autoreconf -i
$ ./configure
$ make
$ sudo make install

then, in the example directory:

$ gcc $CFLAGS -c server.c; gcc $LDFLAGS server.o -o server -lraft -luv -lasan
$ gcc $CFLAGS -c cluster.c; gcc $LDFLAGS cluster.o -o cluster -lraft -luv -lasan

I ran severs manually in 3 different shells, killing and restarting one here and there.
I also ran the cluster executable without tripping any error from ASan.

I have forced an error in the code and got it (just to be sure my setup was right).

I tried this with the current version and also with version d38635e which dates back from the bug report.

This is on ubuntu 20.04 with gcc 9.3.0.

Can you help us reproduce?

from raft.