V3530. Potentially tainted data is used to create an object using deserialization. V5612. Function receives suspicious argument. Conversions between pointers to objects and integer types should not be performed. MISRA. Non-void function must return value. I agree. Object was created but not used. Consider inspecting the condition. V665. The '#pragma warning(push/pop)' should be used instead. V2577. The 'sizeof' expression returns the size of the container type, not the number of elements. Find centralized, trusted content and collaborate around the technologies you use most. The output of the example looks like this: More info about Internet Explorer and Microsoft Edge. V3164. Possible incorrect initialization of variable. V3036. OWASP. Parameter is always rewritten in function body before being used. V3128. Call of 'std::is_constant_evaluated' function always returns the same value. V834. Keyword 'nullptr' can be used for 'pointer' type exception. Potentially tainted data is used to create query. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? OWASP. The value of an expression is a potentially destroyed Unity object or null. V2574. Dangerous widening type conversion from an array of derived-class objects to a base-class pointer. AUTOSAR. So it does not know if the second strlen will return the same value as the first one. An empty container is iterated. MISRA. V642. V586. So, the solution is to apply the warn_unused_result attribute on the function. It may happen that flow is never reaching that part of the code but it is important to write for the compiler. Consider verifying the compatibility of 32 and 64 bit versions of the application in the context of a stored data. Signed integer overflow in arithmetic expression. V736. The opposite operator must also be defined. V3525. MISRA. V1072. Trying to return a value from a non-value returning function will result in a compilation error: A return statement that is not the last statement in a function is called an early return. Explicit type conversion from memsize to double type or vice versa. for example: void throw_blah () { throw "blah"; } int foo () { throw_blah (); } I am pretty curious about this as this is directly related to one of my other issue . Allocation of memory by the pattern "(X*)malloc(sizeof(Y))" where the sizes of X and Y types are not equal. Consider replacing this function with 'std::uncaught_exceptions'. The alignment rules and type sizes have been changed. He also rips off an arm to use as a sword. Void functions dont need a return statement. My advice would be to create a new option Wreturn-pedantic. V791. Suspicious return of a local reference variable which always equals null. Possible XPath injection. V511. Signed value is converted to an unsigned one with subsequent expansion to a larger type in ternary operator. Variable should be declared in a scope that minimizes its visibility. V3060. The object was created but it is not being used. Pointer to local array 'X' is stored outside the scope of this array. Cast should not convert pointer to function to any other pointer type. V725. V770. One, the C standard specifies the behavior of, C error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type], the assembly GCC 11.2 generates for this with, testing by changing the function return type to int and changing the returns to, How a top-ranked engineering school reimagined CS curriculum (Ep. V6012. V101. V6105. Collection is modified while iteration is in progress. V502. Connect and share knowledge within a single location that is structured and easy to search. CS50 Stack Exchange is a question and answer site for students of Harvard University's CS50. V3177. There should be no user-defined variadic functions. MISRA. V2586. Parameter is not utilized inside method's body. V3016. Passing objects of incompatible types to the method of collection. It is suspicious that a char or string literal is added to a pointer. In such a context, we can only call value-returning functions. Consider pre-allocating it by calling reserve(N). V3040. The 'x' variable is assigned values twice successively. Variable of the 'string_view' type references a temporary object, which will be removed after evaluation of an expression. Possible typo inside the string literal. V2506. V2555. 'Dispose' will be invoked before exiting method. For example: In the above program, the value to be printed needs to be provided on the right-side of the std::cout <<. Consider making it implement 'IDisposable' interface. V6085. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Iterators for the container, used in the range-based for loop, become invalid upon a function call. MISRA. V738. V2613. Consider enabling the display of invisible characters in the code editor. V2520. V701. V546. Consider verifying the initializer. Your function should return a vector in every possible condition. V556. The 'value' parameter is rewritten inside a property setter, and is not used after that. MISRA. It is possible that '1' should be present instead of '0'. MISRA. V006. V596. Explicit conversion from 32-bit integer type to pointer type. Understanding the probability of measurement w.r.t. MISRA. Consider inspecting the expression. Check lines: N1, N2. V750. V6034. The analyzer will not issue a warning for the following code fragment: There will also be no undefined behavior if, during the function execution, another function that does not return control, is called. The variable is incremented in the loop. It is possible that an incorrect variable is compared with null after type conversion using 'dynamic_cast'. It's odd that this method always returns one and the same value of NN. V616. An exception handling block does not contain any code. I can give he a test with 2.0.3-RC1 and lease you perceive The return keyword is used during the end of to function to get the value back. Every 'switch' statement should contain non-empty switch-clauses. 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. What does this mean: non-void function does not return a value - Reddit V660. Possible ReDoS vulnerability. V5013. There should be no occurrence of undefined or critical unspecified behaviour. No objects are passed to the 'std::scoped_lock' constructor. Single-line comments should not end with a continuation token. The field (property) is used before it is initialized in constructor. V769. Thus, these functionsdo not result inundefined behavior. Possible exception: type marked by [Serializable] contains non-serializable members not marked by [NonSerialized]. V102. V1092. V2575. AUTOSAR. If certain compiler flags are passed, this type of error or warning might get suppressed entirely, which will lead to run-time faults if the given function gets called in the program. Consider declaring it as a reference. Object was created but is not used. V2548. Function printHi has a void return type, meaning it doesnt return a value. String is printed into itself. V626. Nonsensical comparison: pointer < 0. Consider utilizing an explicit type cast to avoid the loss of a fractional part. Consider assigning event to a local variable before invoking it. Possible error in program's logic. You may or may not use the return . V836. Void functions cant be used in expression that require a value. The statement std::cout << "B" is never executed because the function has returned to the caller prior to that point. Why typically people don't use biases in attention mechanism? The text was updated successfully, but these errors were encountered: Also, can you provide a minimal code sample that reproduces this issue? Typedef names should be unique across all name spaces. V3551. V119. For more information, see "Behavior" in Function Statement. V1036. V530. A non-serializable class should not be serialized. It is likely that a wrong variable is being compared inside the 'for' operator. Connect and share knowledge within a single location that is structured and easy to search. The long long result is stored in squared, then printed. V2566. The value from the uninitialized optional is used. Suspicious code formatting. V6096. Pointer to an object of the class is cast to unrelated class. Code contains invisible characters that may alter its logic. Initial and final values of the iterator are the same. Consider inspecting signed and unsigned function arguments. operator instead. The '? Pointer to FILE should not be dereferenced. Expression containing increment (++) or decrement (--) should not have other side effects. V1043. Reference was invalidated because of destruction of the temporary object returned by the function. Syntax: return[expression]; There are various ways to use return statements. Implicitly specified enumeration constants should be unique consider specifying non-unique constants explicitly. great work. MISRA. V714. Consider inspecting the 'for' operator. The values used in expressions should have appropriate essential types. V3518. V584. This will result in undefined behavior. I forgot it would still issue if all paths don't have a return. The 'i' variable should probably be incremented instead of the 'n' variable. V114. V1003. V3505. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, C, error: control reaches end of non-void function [-Werror,-Wreturn-type], Control may reach end of non-void function [-Werror,-Wreturn-type]. :' operator may not work as expected. V2622. V2593. V6033. V2611. It is possible that a wrong variable is compared inside the 'for' operator. V1085. Function receives an odd argument. V6090. Check for typos and consider using the 'default:' operator instead. Inspect the program's logic. V2609. MISRA. Note that throw_blah is the weird bit, not foo. V835. MISRA. V2565. A more efficient way is to check: str[0] != '\0'. Unreachable code was detected. Consider inspecting the expression. There is no point to declare constant reference to a number. V604. The function expects the file to be opened in one mode, but it was opened in different mode. The variable from the loop exit condition does not change its value between iterations. AUTOSAR. Consider inspecting 'X'. MISRA. This pattern is suspicious. Parameter is not used inside function's body. V512. It is suspicious to cast object of base class V to derived class U. V718. Result of this expression will be implicitly cast to 'Type'. V645. Memory for 'getline' function should be allocated only by 'malloc' or 'realloc' functions. V1005. V6048. Consider using of 'if-else' construct. The constant NN is being utilized. The expression is checked for compatibility with the type 'A', but is casted to the 'B' type. Email? Consider assigning the seed to a value not known at compile-time. Lifetime of the heap-allocated variable is limited to the current function's scope. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. V782. This is unexpected behavior. Early returns can be used in value-returning functions too: First, print() is called. Custom declaration of standard type. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The expression is excessive or contains a logical error. V6056. Function body contains the 'X' label that is not used by any 'goto' statements. V605. V2537. Generic Doubly-Linked-Lists C implementation. V1060. Anonymous function is used to unsubscribe from event. V6087. V3552. V3148. Has the Melford Hall manuscript poem "Whoso terms love a fire" been attributed to any poetDonne, Roe, or other? V3182. V2504. V3118. Cast should not convert a pointer to a function to any other pointer type, including a pointer to function type. Object should not be assigned or copied to an overlapping object. MISRA. MISRA. V734. V3507. The compiler has been asked to treat warnings as errors. Possible incorrect order of arguments passed to method. The expression is incorrect or it can be simplified. V3014. MISRA. See documentation for details. Range intersections are possible within conditional expressions. It is inefficient to identify an empty string by using 'strlen(str) > 0' construct. V6081. Call of the 'Foo' function will lead to buffer underflow. V2601. V585. Function receives an address of a 'char' type variable instead of pointer to a buffer. V6022. OWASP. Make sure the expression is correct. Function exited without releasing the pointer/handle. V735. Consider inspecting the first parameter of 'getline' function. OWASP. MISRA. Suspicious literal: '/r'. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, FWIW, compiling the example code on godbolt.org with, @EricPostpischil but compiler does not know if, Yes, it does know. Expressions with enum underlying type should have values corresponding to the enumerators of the enumeration. Microsoft-specific: The Microsoft C implementation returns the expression value to the process that invoked the program, such as cmd.exe. V2600. V748. Find centralized, trusted content and collaborate around the technologies you use most. V2604. Suspicious getter/setter implementation. Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? rev2023.4.21.43403. V6031. V010. Expression containing increment (++) or decrement (--) should not have other side effects. Handling of two different exception types is identical. V008. Suspicious use of BigDecimal class. The same sub-expression is present on both sides of the operator. Trying to use the return value from the function will most likely cause a segmentation fault. If function ends without return (or throw), then the behaviour of the program will be undefined. V578. Check the array initialization. V113. A pointer/reference parameter in a function should be declared as pointer/reference to const if the corresponding object was not modified. V3138. MISRA. Postfix increment/decrement is senseless because this variable is overwritten. It achieves the same as what you have but it only will add a line instead of modifying the whole function body, and it will be one allocation less ( int val = 0; ). A terminal null is present inside a string. Unhandled exceptions in destructor lead to termination of runtime. V3181. Consequently, putting an empty return statement at the end of a void function is redundant: Do not put a return statement at the end of a non-value returning function. V504. The expression is excessive or contains a misprint. Consider using parentheses in the expression. V795. Potentially tainted data is processed by regular expression that contains an unsafe pattern. Executing this query may lead to an error. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. During the initial analysis, the code nominally contains three code paths. AUTOSAR. A pattern was detected: A || (A && ). Void functions don't need a return statement A void function will automatically return to the caller at the end of the function. Please check projects and solution configurations. V829. V3120. Incorrect format. This presents the compiler with a contradicting declaration and return. Possibly meant: 'A -= B'. B is never printed because the statement never executes. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. V707. If you wish to call constructor, use 'this->Foo::Foo(.)'. MISRA. Check for missing 'throw' keyword. V754. V3178. V6106. V6049. It is possible that type name was omitted: throw MyException(a, b);. OWASP. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. V581. Thanks for helping to make the site better for everyone. Are you missing a 'Return' statement? Decreased performance. OWASP. Size of an array is not specified. Correction-related comments will be deleted after processing to help reduce clutter. Then the ',' operator returns a resulting value from the right side of the expression. Flowing off the end of thesefunctions is equivalent to a'return 0;'. There is a probability of logical error presence. As your code stands, if candidate_count is greater than 0 the loop will iterate once and then unconditionally return false, which I don't think is what you want. V6044. operator works in a different way than it was expected. The class implements a copy constructor/operator=, but lacks the operator=/copy constructor. The 'foo' word is suspicious. Memory allocation will lead to an exception. V760. no return statement in function returning non-void while using C++, How a top-ranked engineering school reimagined CS curriculum (Ep. Only the first element is initialized explicitly. Operands of the logical '&&' or the '||' operators, the '!' It is possible that a typo is present inside the expression. The ', " or \ characters and the /* or // character sequences should not occur in a header file name. V3015. control reaches end of non-void functions -wreturn-type. V3184. Consider inspecting the 'Foo' function call. To learn more, see our tips on writing great answers. :' operator has a lower priority than the 'foo' operator. MISRA. A memory/resource leak is possible. V508. Excessive check can be simplified. V774. Asking for help, clarification, or responding to other answers. The memory areas must not overlap. Some warnings could have been disabled. V5004. Consider using 'i + 1' instead. You can return a value from a Function procedure in any of the following ways: Include the value in a Return Statement. V1083. Why are players required to record the moves in World Championship Classical games? V527. The body of a loop\conditional statement should be enclosed in braces. V3012. The 'then' statement is equivalent to the 'else' statement. A global object variable is declared in the header. The report_ratio function calls ratio with parameter values of 1 and INT_MAX. Function with a non-void return type should return a value from all exit paths. V652. Part of conditional expression is always true/false. Bool type value is compared with value of N. Consider inspecting the expression. Possible path traversal vulnerability. V3026. The initial value of the index in the nested loop equals 'i'. The variable 'X' is being used for this loop and for the outer loop. V3063. V3131. It is possible that these are misprints and 'default:' label should be used instead. Replace iterator++ with ++iterator. V6072. Use volatile variable(s) or synchronization primitives to avoid this. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Non-void function does not return a value. V709. V646. A thread can wait indefinitely or experience a spurious wake-up. If control passes to Exit Function or End Function and you have not assigned any value to the procedure name, the procedure returns the default value of the return data type. V127. V2595. Incorrect comparison of BOOL type variable with TRUE. Possible null dereference. The default is -Wunused-result. V2011. Decreased performance. V790. Consider checking the first actual argument of the 'Foo' method. Referenced package contains vulnerability. Variable should be declared in a scope that minimizes its visibility. The 'first' argument of 'Foo' function is equal to the 'second' argument. V1033. Solve Control Reaches End of Non-Void Function Error in C++ Consider inspecting the correctness of handling the N argument in the 'Foo' function. Potential resurrection of 'this' object instance from destructor. V3151. The variable is incremented in the loop. Floating-point values should not be tested for equality or inequality. V2587. V3154. Use of 'Foo' named constant with 0 value in bitwise operation. Do not warn if a caller of a function marked with attribute warn_unused_result (see Variable Attributes) does not use its return value. V6047. More than N bits are required to store the value, but the expression evaluates to the T type which can only hold K bits. MISRA. V537. Double negation is present in the expression: !!x. It was deemed useful to report this warning as it typically results from inadvertent program design rather than intentional coverage of all cases with a redundant test. MISRA. MISRA. From what I can gather online, this means that I am not returning a value from my function? V771. Error on missing return statement under GCC. V2552. V6084. ** 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. Consider inspecting the condition. Your message has been sent. V3011. If you have parameters instead of "void" in your function's parentheses you have to return something. AUTOSAR. Virtual table pointer will be damaged. Consider inspecting the 'for' operator. Potentially unsafe double-checked locking. The functions from time.h/ctime should not be used. V598. BSTR string becomes invalid. MISRA. V2526. Cast should not remove 'volatile' qualifier from the type that is pointed to by a pointer or a reference. V3025. V1011. V647. A 'wchar_t *' type string is incorrectly converted to 'BSTR' type string. MISRA. V205. V733. It is not recommended to throw exceptions from 'Equals(object obj)' method. It is possible that ',' comma is missing at the end of the string. It is more effective to use the prefix form of ++it. Storing credentials inside source code can lead to security issues. Learn more about Stack Overflow the company, and our products. Decreased performance. Ignored InterruptedException could lead to delayed thread shutdown. V3510. The expression is always true/false. Controlling expressions should not be invariant. Explicit conversion from memsize type to 32-bit integer type. Potentially unsafe double-checked locking. V2532. Potential logical error. V3111. V672. Consider inspecting the NN argument of the 'Foo' function. V6100. V5010. V758. V802. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Only the first member of enumerator list should be explicitly initialized, unless all members are explicitly initialized. V5005. MISRA. V118. Consider inspecting the expression. Thread.sleep() inside synchronized block/method may cause decreased performance. Then, enable it by default, but also make it be enabled by Wpedantic and Wreturn-type.
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