backtrace_thread_p  186 src/eval.c       while (backtrace_thread_p (tstate, pdl) && pdl->kind != SPECPDL_BACKTRACE)
backtrace_thread_p  206 src/eval.c       while (backtrace_thread_p (tstate, pdl) && pdl->kind != SPECPDL_BACKTRACE)
backtrace_thread_p 3915 src/eval.c       while (backtrace_thread_p (tstate, pdl))