When we call a function by itself (e.g. An identifier with array type passed as a function argument should not decay to a pointer. V688. It means that there is no default return value for your function outside of the for loop. Expression is equivalent to moving one unique pointer to another. The expression is always false. V1003. V1002. "Signpost" puzzle from Tatham's collection, QGIS automatic fill of the attribute table by expression, Generating points along line with specifying the origin of point generation in QGIS. V659. Variable is not used after memory is allocated for it. Decreased performance. Such a function results in undefined behavior. Casts between a pointer and a non-integer arithmetic type should not be performed. int sometimes ( int x) { if (x > 0) { return 2*x; } } Suspicious sequence of assignments: A = B; B = A;. V692. AUTOSAR. Consider verifying the compatibility of 32 and 64 bit versions of the application in the context of a stored data. OWASP. Pointer was used before its check for nullptr. The original exception object was swallowed. If you wish to call constructor, use 'this->Foo::Foo(.)'. MISRA. V673. V1017. It's possible that an assigned variable should be checked in the next condition. V2591. Comparison with 'double.NaN' is meaningless. V604. V2507. Otherwise, the integer division operator would be used, and the fractional part would be lost. Returning a value from a void function is a compile error. Consider inspecting the expression. Unsigned value is compared to the NN number. The result of '&' operator is '0' because one of the operands is '0'. V621. What is this brick with a round back and a stud on the side used for? MISRA. Suspicious return of an always empty collection. malloc() function accepts a dangerous expression in the capacity of an argument. Two or more case-branches perform the same actions. The 'A' class contains 'Dispose' method. Suspicious access to element by a constant index inside a loop. OWASP. V6022. Compiler may delete 'memset' function call that is used to clear 'Foo' buffer. V2606. OWASP. Logical literal belongs to second operator with a higher priority. V6097. V752. Suspicious expression 'A[B < C]'. Temporary anonymous object is used. V3028. Consider inspecting the '? Some of the references in project are missing or incorrect. Lifetime of the lambda is greater than lifetime of the local variable captured by reference. MISRA. Parameter is not utilized inside method's body. The expression is always true/false. The operation is executed 2 or more times in succession. WPF: several Dependency Properties are registered with a same name within the owner type. V774. V6011. Manage Settings V706. V537. V724. V2524. MISRA. Check items X, Y, Z, in lines N1, N2, N3, V526. V2580. An overflow of the 32-bit variable is possible inside a long cycle which utilizes a memsize-type loop counter. Code contains invisible characters that may alter its logic. A function should not call itself either directly or indirectly. V2614. An odd sequence of assignments of this kind: A = B; B = A; V3038. V801. Attempt to free memory containing the 'int A[10]' array by using the 'free(A)' function. If function ends without return (or throw), then the behaviour of the program will be undefined. V2599. An 'else' branch may apply to the previous 'if' statement. V3550. Functions should not have unused parameters. The function located to the right of the '|' and '&' operators will be called regardless of the value of the left operand. Possible SQL injection. When we call a function in a context that requires a value (e.g. V1039. A global object variable is declared in the header. Suspicious type cast: 'Type1' to ' Type2'. The object could have been garbage collected before the 'Target' property was accessed. Why does flowing off the end of a non-void function without returning a value not produce a compiler error? Memory allocation and deallocation methods are incompatible. MISRA. Make this option control the pedwarns that don't have any option. The ratio function returns the ratio of its two int arguments as a floating-point double value. V2503. Value of the expression should not be converted to the different essential type or the narrower essential type. V3172. V775. The memory areas must not overlap. V729. Pointer is dereferenced on the initialization list before its check for null inside the body of a constructor function. return expressionopt ; The value of expression, if present, is returned to the calling function. V523. V793. V1074. Explicit conversion from 32-bit integer type to pointer type. The second function call to function printHi() wont even compile. Consider making the project fully compilable and building it before analysis. V5627. MISRA. MISRA. V3185. The 'malloc' function is used to allocate memory for an array of objects that are classes containing constructors/destructors. Consider replacing 'const T' with 'const .. &T' / 'const .. *T'. V3041. There is an easy solution to the problem, even if we understand that every condition is covered we should add a return statement at the end of the function so the compiler is sure that the non-void function will be returning some value. The 'if/if-else/for/while/foreach' statement and code block after it are not related. A value of variable is not modified. The expression, if present, is evaluated and then converted to the type returned by the function. This value is already assigned to the 'b' variable. V566. Suspicious comparison found: 'a == b == c'. V6010. This means that the second 'if' statement is senseless. V585. Use of outdated cryptographic algorithm is not recommended. V2555. Use of two opposite conditions. MISRA. As soon as your program hits that, it will stop executing the loop and return to the main function, performing only a single iteration of the loop. V768. Consider assigning event to a local variable before invoking it. V1058. Remember that 'a == b == c' is not equal to 'a == b && b == c'. V2621. The expression of the 'char' type is passed as an argument of the 'A' type whereas similar overload with the string parameter exists. The switch statement does not cover all values of the enum. In a prior lesson (2.1 -- Introduction to functions), we indicated that the syntax for a function definition looks like this: Although we showed examples of functions that had return-type void, we did not discuss what this meant. Please check projects and solution configurations. Variable was compared to zero before it was used as a divisor. The 'throw' keyword could be missing. V1016. MISRA. The expression is excessive or contains a misprint. Undefined behavior will occur in case of signed integer overflow. MISRA. Size of the 'time_t' type is not 64 bits. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? Empirical analysis. V6058. There are two 'if' statements with identical conditional expressions. V798. Octal constants should not be used. V2001. V5610. It means that there is no default return value for your function outside of the for loop. The escape sequence ends with a letter and the next character is also a letter. V822. V527. Exception classes should be publicly accessible. V6026. Consider synchronizing the field on all usages. In this case, we can call either a non-value returning function, or we can call a value-returning function and just ignore the return value. Generic Doubly-Linked-Lists C implementation. The 'sizeof' expression returns the size of the container type, not the number of elements. V758. Use of a pointer to FILE when the associated stream has already been closed. Unconditional 'break/continue/return/goto' within a loop. V3024. The condition (ptr - const_value) is only false if the value of a pointer equals a magic constant. The standard input/output functions should not be used. Variable is used after it is moved. The loop counter should not have floating-point type. V3045. V3073. Octal constants should not be used. An exception should be caught by reference rather than by value. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. V3082. What is scrcpy OTG mode and how does it work? AUTOSAR. The macro with the 'setjmp' name and the function with the 'longjmp' name should not be used. Likewise, report_ratio returns void, so we don't save its return value, either. Decreased performance. Silent suppression of exceptions can hide the presence of bugs in source code during testing. MISRA. Effect of a "bad grade" in grad school applications, Using an Ohm Meter to test for bonding of a subpanel. V1043. A non-serializable class should not be serialized. Recursive function call during the static/thread_local variable initialization might occur. V2003. V2556. V830. Decreased performance. The '+' operation is executed. Suspicious semicolon ';' after 'if/for/while' operator. V5302. Only the first element is initialized explicitly. The 'foo' word is suspicious. The statement std::cout << "B" is never executed because the function has returned to the caller prior to that point. The value from the uninitialized optional is used. OWASP. V1078. So, the solution is to apply the warn_unused_result attribute on the function. V1047. V3043. MISRA. An item with the same key has already been added. V6029. Check lines: N1, N2. V723. V3141. V565. V104. V2611. However, C doesn't require the parentheses. Two similar code fragments were found. It's better to use '= default;' syntax instead of empty body. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. V5009. Initial and final values of the iterator are the same. It is recommended to use the 'make_unique/make_shared' function to create smart pointers. V6043. The '//' and '/*' character sequences should not appear within comments. V2506. V2549. OWASP. Non-void functions always have to have a return statement. Maximum size of a vector is known at compile time. ** By clicking this button you agree to our, * By clicking this button you agree to our, Free PVS-Studio license for Microsoft MVP specialists, To get the licence for your open-source project, please fill out this form. The 'operator &&', 'operator ||', 'operator ,' and the unary 'operator &' should not be overloaded. V1075. AUTOSAR. The expression was enclosed by parentheses twice: ((expression)). OWASP. It is more effective to use the prefix form of ++it. The expression is excessive or contains a logical error. Consider passing the 'Foo' argument as a pointer/reference to const. V549. Pointer was used after the memory was released. Is that what you want? C-style explicit type casting is utilized. V700. MISRA. V6064. V505. V681. V560. V1077. Since the second call to std::cout does not provide a value to be printed, this causes an error. Explicit conversion of pointer type to 32-bit integer type. Analysis aborted by timeout. Particularly, if during the function execution an exception is thrown and is not caught in the body of the same function, there will be no undefined behavior. Conditional expressions of 'if' statements located next to each other are identical. V727. V3124. V2601. V767. From the documentation of JSON_THROW_USER: Note that JSON_THROW_USER should leave the current scope (e.g., by throwing or aborting), as continuing after it may yield undefined behavior. V3530. V662. MISRA. OWASP. V1015. V6003. Three potential reasons for issue the warning (elevated to an error) in spite of this come to mind: Nonetheless, this is easy to work around. The switch statement does not cover all values of the enum. MISRA. How to Make a Black glass pass light through it? V2600. A switch-expression should not have Boolean type. The 'Thread' object is created but is not started. V503. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. The standard signal handling functions should not be used. :' operator, regardless of its conditional expression, always returns the same value. Signed value is converted to an unsigned one with subsequent expansion to a larger type in ternary operator. Consider casting operands, not the result. That's because exit is marked as [[noreturn]]. Parameter of 'CancellationToken' type is not used inside function's body. Regression: objToJSON "nonvoid function does not return a value" error is back #31463 Closed pkaleta mentioned this issue on Jun 24, 2020 BUG: NUMPY_IMPORT_ARRAY_RETVAL undeclared when installing pandas 0.18.1 #34969 Closed Sign up for free to join this conversation on GitHub . The global namespace should only contain 'main', namespace declarations and 'extern "C"' declarations. Loop may execute incorrectly or may not execute at all. V121. Moving an object in a return statement prevents copy elision. Numeric Truncation Error. V3039. Suspicious division. V3144. Check your control flow logic and make sure you assign a value before every statement that causes a return. V1050. A boy can regenerate, so demons eat him for years. :' operator, regardless of its conditional expression, always returns one and the same value. The code can be rewritten as either: Although you report testing the former option, GCC will not report the warning in this case, so I believe your test was faulty, such as compiling code other than what you intended to compile. Type implementing IEquatable
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