Initialize interrupt queue before signal handlers (#9196)

inits.c

@@ -51,7 +51,6 @@ rb_call_inits(void)
     CALL(Dir);
     CALL(Time);
     CALL(Random);
-    CALL(signal);
     CALL(load);
     CALL(Proc);
     CALL(Binding);
@@ -63,6 +62,7 @@ rb_call_inits(void)
     CALL(VM);
     CALL(ISeq);
     CALL(Thread);
+    CALL(signal);
     CALL(Fiber_Scheduler);
     CALL(process);
     CALL(Cont);

signal.c

@@ -1488,6 +1488,9 @@ Init_signal(void)
     rb_alias(rb_eSignal, rb_intern_const("signm"), rb_intern_const("message"));
     rb_define_method(rb_eInterrupt, "initialize", interrupt_init, -1);
 
+    // It should be ready to call rb_signal_exec()
+    VM_ASSERT(GET_THREAD()->pending_interrupt_queue);
+
     /* At this time, there is no subthread. Then sigmask guarantee atomics. */
     rb_disable_interrupt();