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<body class='hmmessage'><div dir='ltr'>Ok, thank you Richard for your answer. Now I understand what a friendType is. Two friendDecl, but only the marked bold is a FriendType:<br> friend <b>class A</b>; <br> friend void a();<br><br>Thanks again.<br><br><div><hr id="stopSpelling">Date: Wed, 14 Jan 2015 13:39:00 -0800<br>Subject: Re: [cfe-dev] Invalid FriendDecl<br>From: richard@metafoo.co.uk<br>To: pedretti_86@hotmail.com<br>CC: cfe-dev@cs.uiuc.edu<br><br><div dir="ltr"><div class="ecxgmail_extra"><div class="ecxgmail_quote">On Wed, Jan 14, 2015 at 12:05 PM, victor <span dir="ltr"><<a href="mailto:pedretti_86@hotmail.com" target="_blank">pedretti_86@hotmail.com</a>></span> wrote:<br><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;">
<div><div dir="ltr">Hi everyone,<br><br>I have something like this in my code:<br><br><blockquote>for(CXXRecordDecl::friend_iterator fi=c1->friend_begin(); fi != c1->friend_end(); fi++){<br> <b>QualType qt = (*fi)->getFriendType()->getType()</b>;<br> ...<br>}<br></blockquote><br>When using this code to analyze the following "friend": <br><br><blockquote>inline <b>friend</b> QDebug operator<< (QDebug s, const Cursor& cursor)<br></blockquote><br>I get this segmentation fault:<br><br><blockquote>Program received signal SIGSEGV, Segmentation fault.<br>clang::TypeSourceInfo::getType (this=0x0) at /usr/local/include/clang/AST/Decl.h:66<br>66 QualType getType() const { return Ty; }<br></blockquote><br>I have been searching for this issue and found this bug (<a href="http://llvm.org/bugs/show_bug.cgi?id=7190#attach_4928" target="_blank"></a><a href="http://llvm.org/bugs/show_bug.cgi?id=7190#attach_4928%29" target="_blank"></a><a href="http://llvm.org/bugs/show_bug.cgi?id=7190#attach_4928%29" target="_blank">http://llvm.org/bugs/show_bug.cgi?id=7190#attach_4928)</a>, where is said:<blockquote><pre>"In the attached testcase, clang will attempt to instantiate the friend decl which is invalid because <br>Derived has not been declared."</pre></blockquote>I think that maybe this is my problem,</div></div></blockquote><div><br></div><div>No, it's not. You're calling 'getFriendType()' on a FriendDecl that represents a friend function, not a friend type, so it returns nullptr. You then try to call 'getType()' on a null pointer.</div><div> </div><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;"><div><div dir="ltr">I mean, that the friend decl is invalid because it has not been declared. But, how can I avoid the launch of this signal? I cannot prevent the appearance of this situation and I don't want the program to terminate.<br><br>I hope you can help me with this. Thanks in advance.<br> </div></div>
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