Fixed #3034 (Cppcheck crash on specific file (truecrypt).)

lib/checkbufferoverrun.cpp

@@ -720,6 +720,8 @@ void CheckBufferOverrun::checkFunctionParameter(const Token &tok, unsigned int p
                         ftok = ftok->next()->link()->next()->link();
                         if (Token::simpleMatch(ftok, "} else {"))
                             ftok = ftok->tokAt(2)->link();
+                        if (!ftok)
+                            break;
                         continue;
                     }
                 }

test/testbufferoverrun.cpp

@@ -209,6 +209,7 @@ private:
 
         TEST_CASE(crash1);	// Ticket #1587 - crash
         TEST_CASE(crash2);  // Ticket #2607 - crash
+        TEST_CASE(crash3);  // Ticket #3034 - crash
 
         TEST_CASE(executionPaths1);
         TEST_CASE(executionPaths2);
@@ -2900,6 +2901,18 @@ private:
         check("struct C {} {} x");
     }
 
+    void crash3()
+    {
+        check("void a(char *p) {\n"
+              "    f( { if(finally_arg); } );\n"
+              "}\n"
+              "\n"
+              "void b() {\n"
+              "    char arr[64];\n"
+              "    a(arr);\n"
+              "}");
+    }
+
 
     void epcheck(const char code[])
     {