Fix #12996 FP memleak after checking for failure (#6671)

Author: chrchr-github

lib/checkleakautovar.cpp

@@ -1153,7 +1153,7 @@ void CheckLeakAutoVar::ret(const Token *tok, VarInfo &varInfo, const bool isEndO
                 const Token* const ifStart = ifEnd->link();
                 const Token* const alloc = it->second.allocTok;
                 if (precedes(ifStart, alloc) && succeeds(ifEnd, alloc)) { // allocation and check in if
-                    if (Token::Match(outparamFunc->next()->astParent(), "%comp%"))
+                    if (outparamFunc->next()->astParent() == ifStart || Token::Match(outparamFunc->next()->astParent(), "%comp%"))
                         continue;
                 } else { // allocation result assigned to variable
                     const Token* const retAssign = outparamFunc->next()->astParent();

test/cfg/posix.c

@@ -1057,6 +1057,15 @@ void memleak_getaddrinfo_if() // #12506
     }
 }
 
+void memleak_getaddrinfo_if2() // #12996
+{
+    struct addrinfo *addrs = NULL;
+    if (getaddrinfo("a", "b", NULL, &addrs)) {
+        return;
+    }
+    freeaddrinfo(addrs);
+}
+
 void memleak_mmap(int fd)
 {
     // cppcheck-suppress [unusedAllocatedMemory, unreadVariable, constVariablePointer]