From: Tomasz Wegrzanowski <taw@...>
Date: 2003-01-23T11:48:03+09:00
Subject: Ruby, C, and garbage collection

    VALUE a, b, c;

    a = rb_some_function_1();
    b = rb_some_function_2();
    c = rb_do_something(a,b);

In this code, if Ruby decides to do GC during rb_some_function_2,
`a' will be destroyed, and it will segfault at rb_do_something.

Well, real code that segfaults is a bit more complex, but the problem
is the same - after allocation of one variable, GC is run,
and another variable is destroyed, and then it segfaults
trying to use destroyed variable.

How to overcome that ?