Add repro script

repro.rb

@@ -0,0 +1,20 @@
+puts "Running on:"
+system "ruby -v"
+
+# Set low Xmx to try to increase repro rate
+# ENV["TRUFFLERUBYOPT"] = "--vm.Xmx2G"
+ENV["TRUFFLERUBYOPT"] = "--vm.Xmx1G"
+
+try = 0
+loop do
+  try += 1
+  log = "logs/#{$$}_#{try}.log"
+  # command = "bundle exec rake ci >#{log} 2>&1"
+  command = "bundle exec rspec --pattern 'spec/**{,/*/**}/*_spec.rb' --color --backtrace --order defined --format documentation >#{log} 2>&1"
+  puts "Try #{try}, running #{command}"
+  system command
+  p $?
+  if File.binread(log).include? "SegfaultHandler caught a segfault"
+    abort "SEGFAULT! see log #{log}"
+  end
+end