[PATCH] thread.c (do_select): fix leak on exception
thread.c (do_select): fix leak on exception When do_select is interrupted and raise happens from RUBY_VM_CHECK_INTS_BLOCKING, the original FD sets we copied do not get freed, leading to a memory leak. Wrap up all the FD sets into a Ruby object to ensure the GC can release an allocations made for rb_fdset_t. This leak existed since Ruby 2.0.0 (r36430)
I found this bug because I was tracking down a problem
while working on timer-thread elimination.