HTTP/1.1 -1 Read error in cache disk data: SuccessContent-Type: text/tab-separated-values; charset="utf-8" Last-Modified: Sat, 22 Jan 2022 04:58:53 GMT Content-length: 1647 Connection: Close Proxy-Connection: Close X-Cache: HIT from web1.osuosl.org Server: ProxyTrack 0.5 (HTTrack 3.49.2) id summary reporter owner description type status priority milestone component version severity resolution keywords cc lang patch platform 1992 [NCI] callback sub parameter definition isn't unified with callback definition in the C lib. jimmy "Hello, see https://github.com/parrot/parrot/blob/master/src/nci_test.c#-115 , there are two define here. {{{ typedef void (*cb_C1_func)(const char*, void*); PARROT_DYNEXT_EXPORT void nci_cb_C1(cb_C1_func, void*); }}} the callback is created by: {{{ cb_wrapped = new_callback cb, user_data, ""vtU"" }}} which means it's first parameter is external_data, and the two is user_data. that is, the callback function should be defined as this one: {{{ .sub _call_back .param string external_data .param pmc user_data print ""user data: "" print u print ""\n"" print ""external data: "" print s print ""\n"" .end }}} but actually in t/pmc/nci.t, it's defined as: {{{ .sub _call_back .param pmc user_data .param string external_data print ""user data: "" print u print ""\n"" print ""external data: "" print s print ""\n"" .end }}} according to t/pmc/nci.t it seems that no matter user_data is the first parameter or two, the callback sub must be defined as: {{{ .sub _call_back .param pmc user_data .param string external_data .end }}} then I took a look at PDD16, and it's said user_data should be defined in the second parameter: {{{ .sub _call_back .param string external_data .param pmc user_data .end }}} which is right." bug new normal core 3.0.0 medium lbar.js">