}
#endif /* !no_mor_get_linear_isa */
+#ifdef DEBUGGING
+SV**
+mouse_av_at_safe(pTHX_ AV* const av, I32 const ix){
+ assert(av);
+ assert(SvTYPE(av) == SVt_PVAV);
+ assert(AvMAX(av) >= ix);
+ return &AvARRAY(av)[ix];
+}
+#endif
+
+void
+mouse_throw_error(SV* const metaobject, SV* const data /* not used */, const char* const fmt, ...){
+ dTHX;
+ va_list args;
+ SV* message;
+
+ PERL_UNUSED_ARG(data); /* for moose-compat */
+
+ assert(metaobject);
+ assert(fmt);
+
+ va_start(args, fmt);
+ message = vnewSVpvf(fmt, &args);
+ va_end(args);
+
+ {
+ dSP;
+ PUSHMARK(SP);
+ EXTEND(SP, 4);
+
+ PUSHs(metaobject);
+ mPUSHs(message);
+
+ mPUSHs(newSVpvs("depth"));
+ mPUSHi(-1);
+
+ PUTBACK;
+
+ call_method("throw_error", G_VOID);
+ croak("throw_error() did not throw the error (%"SVf")", message);
+ }
+}
+
/* equivalent to "blessed($x) && $x->isa($klass)" */
bool