End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Thread#backtrace

thread.backtrace → array or nil

static VALUE
rb_thread_backtrace_m(int argc, VALUE *argv, VALUE thval)
{
    return rb_vm_thread_backtrace(argc, argv, thval);
}

Returns the current backtrace of the target thread.

See also #alive? #backtrace_locations #add_trace_func #exit also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0