Run ruby's make check repetedly
Build ruby.
git clone https://github.com/akr/ruby-repeat-check.git
cd ruby-repeat-check
# build ruby trunk in a directory ("o0" here but other names are ok)
mkdir o0
cd o0
prefix=`pwd`
svn co http://svn.ruby-lang.org/repos/ruby/trunk ruby
cd ruby
autoconf
./configure --prefix="$prefix" --disable-install-doc optflags=-O0
make all install
cd ../..
./loop >& z.log
Watch error/*.log in another terminal.