[squid-dev] squid3.5.27 can't show correctly https website.how can i certain the wrong area in code.

[G~D~Lunatic]

i used squid 3.5.27  . the website is www.hupu.com  . Serveral websites like this can't been shown correctly. 
i use command "./squid -k debug". The result like 
2017/11/08 16:06:03.996 kid1| 41,5| AsyncCall.cc(38) make: make call MaintainSwapSpace [call49573]
2017/11/08 16:06:03.996 kid1| 47,5| ufs/UFSSwapDir.cc(448) maintain: space still available in /usr/local/squid/var/cache/squid
2017/11/08 16:06:03.996 kid1| 41,7| event.cc(322) schedule: schedule: Adding 'MaintainSwapSpace', in 1.00 seconds
2017/11/08 16:06:03.996 kid1| 41,5| AsyncCallQueue.cc(57) fireNext: leaving MaintainSwapSpace()

i can't understand because i thought debug message come from following codes.
debugs(33, 3, "Connection gone while waiting for ssl_crtd helper reply; helper reply:" << reply);
debugs(33, 5, HERE << "Certificate for " << sslConnectHostOrIp << " was successfully recieved from ssl_crtd");

how can i certain the wrong area in code.
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