V6072. The square function returns the square of its argument, in a wider type to prevent an arithmetic error. Implicit type conversion of return value to memsize type. Suspicious explicit type casting. It is possible that ',' comma is missing at the end of the string. V5013. Cyclomatic complexity: NN. Several shared_ptr objects are initialized by the same pointer. In a main function, the return statement and expression are optional. V3131. The '//' and '/*' character sequences should not appear within comments. V5619. This expression can be simplified. V103. Possible exception when serializing type. One pair of parentheses is unnecessary or misprint is present. This way, you won't miss messages from our team in the future. I compiled a small program containing the following function definition. V3147. Consider checking the N format items of the 'Foo' function. The 'X' counter is not used inside a nested loop. What happens to the returned value, if one is specified, depends on the implementation. V3541. V696. Expression containing increment (++) or decrement (--) should not have other side effects. V3044. V527. Variables are initialized through the call to the same function. V3178. This will result in undefined behavior. Consider inspecting the 'Foo' function call. V3057. Consider casting operands, not the result. Expression of sizeof(T)*N kind is summed up with pointer to T type. 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. There are two 'if' statements with identical conditional expressions. V2017. GCC options: warning on non-void functions without a return statement, Type No return, in function returning non-void, no return in function using switch statement, No return statement warning in function returning non-void. Function '' doesn't return a value on all code paths. A pattern was detected: A || (A && ). A 'wchar_t *' type string is incorrectly converted to 'BSTR' type string. Possible XPath injection. OWASP. V109. operator should have 'bool' type. Consider using a comparison with defined precision: Math.Abs(A - B) < Epsilon or Math.Abs(A - B) > Epsilon. V114. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? V2513. Not the answer you're looking for? V3043. The best answers are voted up and rise to the top, Not the answer you're looking for? It causes the function to return to the caller immediately. This can result in an overflow. Classes should always be derived from std::exception (and alike) as 'public'. The expression is excessive or contains a misprint. Memory allocation will lead to an exception. V5609. Check if program logic handles it correctly. 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. The first statement in print() prints A. V220. Class member is initialized with dangling reference. Getting "non-void function does not return a value in all control paths", New blog post from our CEO Prashanth: Community is the future of AI, Improving the copy in the close modal and post notices - 2023 edition, Embedded hyperlinks in a thesis or research paper. This presents the compiler with a contradicting declaration and return. V820. Possible exception: type marked by [Serializable] contains non-serializable members not marked by [NonSerialized]. It is suspicious that the assignment operator takes an object by a non-constant reference and returns this object. The function with the 'abort/exit/getenv/system' name should not be used. Can the game be left in an invalid state if all state-based actions are replaced? The method does not override another method from the base class. Cast should not remove 'const' / 'volatile' qualification from the type that is pointed to by a pointer or a reference. AUTOSAR. Part of conditional expression is always true/false. Iterators are passed as arguments to 'Foo' function. The '||' operator is surrounded by opposite expressions 'x' and '!x'. V3118. V3050. V3004. It is possible that a typo is present inside the expression. V682. V5305. V001. The function was annotated as dangerous. Call of the 'Foo' function will lead to buffer overflow. V2511. The compiler makes no such assumptions, so you need to make sure that there is a return path that will be followed if the return statement inside your loop is never reached. V6078. V3183. Virtual table pointer will be damaged. V3074. Perhaps the correct expression is strlen(expr) + 1. Conversions between pointers to objects and integer types should not be performed. Consider inspecting the NNth argument of the 'Foo' function. Single-line comments should not end with a continuation token. V2566. The expression is always false. Uninitialized variables are used when initializing the 'A' variable. V713. V1069. MISRA. MISRA. V716. great work. AUTOSAR. There is a probability of logical error presence. V6084. Consider checking the use of this variable. Unsafe usage of the 'bool' and integer types together in the operation '&='. V3049. V1002. This leads to undefined behavior. V2598. The global namespace should only contain 'main', namespace declarations and 'extern "C"' declarations. Use of jump statements in 'finally' block can lead to the loss of unhandled exceptions. V3095. Number of iterations in loop equals size of a pointer. Due to the way the compiler is constructed, warnings are generally reported early, and suppressing this warning based on later analysis would be difficult. I agree. AUTOSAR. A new object is created, while a reference to an object is expected. The 'foo' word is suspicious. V3062. Octal and hexadecimal escape sequences should be terminated. The 'goto' statement shouldn't jump to a label declared earlier. V3182. Suspicious precise comparison. The body of a loop\conditional statement should be enclosed in braces. The 'Foo' function receives class-type variable as 'N'th actual argument. V3144. V2583. V2563. V007. Why are players required to record the moves in World Championship Classical games? V739. Every 'switch' statement should have a 'default' label, which, in addition to the terminating 'break' statement, should contain either a statement or a comment. hi, at least for bool keyPressed(ofKeyEventArgs& args) it should return false as the default otherwise the event propagation will stop.. in glTypeForImageType(int imageType)I would simply add return 0; at the end of the function. The 'GetObjectData' implementation in unsealed type is not virtual, incorrect serialization of derived type is possible. OWASP. The resource was acquired using 'X' function but was released using incompatible 'Y' function. V6100. V3145. Consider inspecting the loop expression. V752. Decreased performance. The identifier 'main' should not be used for a function other than the global function 'main'. Buffer needs to be securely cleared on all execution paths. OWASP. use custom JSON_THROW_USER without exceptions. V3189. Why does an overridden function in the derived class hide other overloads of the base class? Excessive expression. V829. The compiler has been asked to warn when a function has a control path that doesn't return a value (although not mentioned in the message, throwing a value and possibly calling a non-returning function may also be considered acceptable). Why Oracle let function (basic/nopipelined) without RETURN compile, and throws error in execution. Creating an object with placement new requires a buffer of large size. V760. The statement std::cout << "B" is never executed because the function has returned to the caller prior to that point. The variable 'X' is being used for this loop and for the outer loop. Consider using '||' and '&&' instead. No objects are passed to the 'std::scoped_lock' constructor. V561. Wrong variable is probably used in the for operator as an index. 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. Derived class object was copied to the base class object. Calling the 'SingleOrDefault' method may lead to 'InvalidOperationException'. V3133. Hi, been using 2.0.1 so far over the proposed workaround (void function instead of non-void function). Use of two opposite conditions. V772. Usage of a suspicious mutex wrapper. V5626. V798. V3047. It is complaining because within the first for loop, if block returns v but else if block does not return anything. Such a function results in undefined behavior. V624. V5606. V552. MISRA. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? V591. V3188. Consider inspecting the 'for' operator. The loop counter should not have floating-point type. Macro expression is dangerous or suspicious. Unchecked tainted data is used in expression. Use memsize type instead. V3029. This leads to undefined behavior. V3034. V3111. AUTOSAR. V1039. 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.. Intermodular analysis may be incomplete, as it is not run on all source files. Check lines: N1, N2. The 'static' keyword shall not be used between [] in the declaration of an array parameter. MISRA. V5603. Thus, the analyzer will not issue a warning for the following code fragment: You can look at examples of errors detected by the V591 diagnostic. MISRA. Memory allocation and deallocation functions should not be used. After each of these function calls, execution continues at the next statement. V3530. Not all members of a class are initialized inside the constructor. V3026. MISRA. Consider inspecting the function call. V773. Consider reviewing this value. V646. C-style explicit type casting is utilized. The standard input/output functions should not be used. ** 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. V631. Consider specifying execution policy explicitly. Unexpected uint64 behaviour 0xFFFF'FFFF'FFFF'FFFF - 1 = 0? Argument of the '|' bitwise operation always contains non-zero value. MISRA. Syntax: return[expression]; There are various ways to use return statements. MISRA. V1048. V3102. Passing objects of incompatible types to the method of collection. An exception handling block does not contain any code. The 'if' 'else if' construct should be terminated with an 'else' statement. Probably meant: *ptr != zero. Possible incorrect use of '#pragma warning(default: X)'. V3529. Expression is enclosed by parentheses twice: ((expression)). The arguments violate the bounds of collection. AUTOSAR. V823. The expression of 'foo(foo(x))' pattern is excessive or contains an error. Function returns pointer/reference to temporary local object. Without re-registering for finalization, destructor will not be called a second time on resurrected object. This may break the program's logic. Are you missing a 'Return' statement? The switch statement does not cover all values of the enum. MISRA. Explicit conversion from 32-bit integer type to pointer type. V3025. Unsafe synchronization on an object. V528. V3091. It is possible that this 'else' branch must apply to the previous 'if' statement. Perhaps, 'ThenBy' should be used instead. V3058. This may lead to ODR violation. Consider inspecting the expression. The macro with the 'setjmp' name and the function with the 'longjmp' name should not be used. Odd use of special character in regular expression. (i have tried it with just else instead of else if and get same error). Connect and share knowledge within a single location that is structured and easy to search. The argument of the method is not expected to be null. V3123. Save the file, and compile it in a Developer command prompt window by using the command: Then, to run the example code, enter C_return_statement.exe at the command prompt. The 'A' class containing IDisposable members does not itself implement IDisposable. This is unexpected behavior. The '<' operator should probably be replaced with '<<'. Analysis of 'Makefile/Utility' type projects is not supported in this tool. Consider replacing this function with 'std::uncaught_exceptions'. Structures with members of real type are compared byte-wise. V3550. V3509. V3175. Function body contains the 'X' label that is not used by any 'goto' statements. in your code compiler does not know if the key will not be changed in the call to strlen as you pass a pointer (side effects). MISRA. Consider inspecting the expression. Suspicious operation of 'sizeof(X)/sizeof(T)' kind, where 'X' is of the 'class' type. Parameter is not used inside method's body. V525. Probably it is a mistake. V611. Suspicious declaration. MISRA. Generating points along line with specifying the origin of point generation in QGIS. Parameter of 'CancellationToken' type is not used inside function's body. no return statement in function returning non-void while using C++, How a top-ranked engineering school reimagined CS curriculum (Ep. The 'SysFreeString' function should be called only for objects of the 'BSTR' type. MISRA. See documentation for details. An excessive check can be simplified. When main calls printHi, the code in printHi executes, and Hi is printed. V6048. std::cout), a value must be provided. Recursive function call during the static/thread_local variable initialization might occur. V667. Possible NullReferenceException. Suspicious return of an always empty collection. V712. The 'while' operator has empty body. V593. The standard signal handling functions should not be used. V516. Although GCC is able to analyze the code and determine that exactly one of the cases is executed (as shown in the supplement below), presumably this analysis occurs only later in the compilation process. MISRA. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. Consider re-generating your suppress file to continue updating it. Cast should not remove 'const' / 'volatile' qualification from the type that is pointed to by a pointer or a reference. OWASP. V2578. He also rips off an arm to use as a sword. Be advised that the size of the type 'long' varies between LLP64/LP64 data models. V2019. V3020. V6093. The expression contains a suspicious mix of integer and real types. Potential Java SE API compatibility issue. The '&=' operation always sets a value of 'Foo' variable to zero. :' operator has a lower priority than the 'foo' operator. V121. A void function will automatically return to the caller at the end of the function. V5002. MISRA. Pointer is cast to a more strictly aligned pointer type. V3126. Typedef names should be unique across all name spaces. V2527. Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? V2569. Consider inspecting the expression. The function with the 'atof/atoi/atol/atoll' name should not be used. It is suspicious that the 'foo' field in derived class overwrites field in base class. A resource is returned from try-with-resources statement. V1094. Expressions that use comma operator ',' are dangerous. Consider inspecting the 'foo' function. V636. Consider reviewing 'X'. V2004. Use 'double.isNaN()' method instead. Does a password policy with a restriction of repeated characters increase security? MISRA. Range intersections are possible within conditional expressions. The 'sizeof' expression returns the size of the container type, not the number of elements. V2568. I am writing a function to validate if the strlen of a string = 26 or not and returning a boolean value however I get an error message stating "error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type]" despite there being no way for a value not to be returned. operator instead. The value range of the variable: [A, B]. V2608. Size of every element in X array is not equal to divisor. V530. Macro name overrides a keyword/reserved name. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Recurring sequence of explicit type casts. V731. You are assuming that loop will always run, but, what if an empty string ends up getting submitted? V3528. 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. Unary minus operator should not be applied to an expression of the unsigned type. It is not recommended to return null or throw exceptions from 'toString' / 'clone' methods. Verifying that a pointer value is not NULL is not required. Consider inspecting it. 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. V6073. What were the poems other than those by Donne in the Melford Hall manuscript? Incorrect comparison of BOOL type variable with TRUE. V5622. V3136. Waiting on condition variable without predicate. Youll need to comment out this line of code in order to make your code compile. V1006. AUTOSAR. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? V538. OWASP. V1017. V6019. Allocation of memory by the pattern "(X*)malloc(sizeof(Y))" where the sizes of X and Y types are not equal. "non-void function does not return a value in all control paths". Consider verifying the initializer. V2552. Suspicious explicit conversion from 'float *' type to 'double *' type. Asking for help, clarification, or responding to other answers. What's the cheapest way to buy out a sibling's share of our parents house if I have no cash and want to pay less than the appraised value? It is safer to use the 'foo' function. The argument should probably be rendered as a constant pointer/reference. V3548. Consider using the 'size()' function. Array is used as pointer to single object. Check for typos. Check items X, Y, Z, in lines N1, N2, N3, V526. V104. The expression is excessive or contains a logical error. MISRA. V3023. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Examine the substrings "abc" and "abcd". V723. Explicit conversion from 'float/double' type to signed integer type. Operand of sizeof() operator should not have other side effects. V733. Object slicing. Suspicious comparison found: 'a == b == c'. V1037. Defining absolute path to file or directory is considered a poor coding style. V3125. So GCC knows there is no possible control path that does not return a value, but it reported the warning (elevated to an error) anyway. V6071. V3167. V5615. MISRA. Insecure XML parser is used to process potentially tainted data. V3165. V2015. AUTOSAR. V128. V6033. Potentially unsafe double-checked locking. The function is deprecated in the Win64 system. Size of an array is not specified. Expression contains a suspicious mix of integer and real types. V824. 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. AUTOSAR. InvalidClassException may occur during deserialization. Different containers are used to set up initial and final values of iterator. AUTOSAR. V584. V546. If you haven't received our response, please do the following: check your Spam/Junk folder and click the The '&=' or '|=' operator is redundant because the right operand is always true/false. Semicolon ';' is probably missing after the 'return' keyword. When a return statement contains an expression in functions that have a void return type, the compiler generates a warning, and the expression isn't evaluated. The standard input/output functions should not be used. The alignment rules and type sizes have been changed. The 'X' variable is used for this loop and outer loops. As we know pipelined function doesn't require Return, because of its working and for best programming practice we write it. V608. NullReferenceException is possible. V5011. It is possible that a wrong variable is incremented inside the 'for' operator. Decreased performance. It is possible that 'else' block was forgotten or commented out, thus altering the program's operation logics. After the year 2038, the program will work incorrectly. Thanks for helping to make the site better for everyone. How do I count the number of sentences in C using ". V811. V3036. V6044. V3520. Non-void functions always have to have a return statement. Consider inspecting usage of 'Y' counter. Decreased performance. String literal contains potential interpolated expression. V3028. The variable is assigned the same value on several loop iterations. Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The 'continue' operator will terminate 'do { } while (FALSE)' loop because the condition is always false. V3108. V3098. The expression is checked for compatibility with type 'A', but is cast to type 'B'. V603. V6045. Argument of sizeof() is a macro, which expands to a number. V6080. Unsafe invocation of event, NullReferenceException is possible. rev2023.4.21.43403. V2520. This pattern is suspicious. Pointer was used in the logical expression before its check for nullptr in the same logical expression. Macro should not be defined with the same name as a keyword. OWASP. MISRA. A function should have a single point of exit at the end. Probably the '!='/'-='/'+=' should be used here. V1095. Here is my code: why does it show compile error?? MISRA. Operation is executed 3 or more times in a row. English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus". V3532. It's better to use '= default;' syntax instead of empty body. OWASP. This return value is also printed. V3009. Length should be probably multiplied by sizeof(wchar_t). V6014. Consider inspecting the expression. MISRA. The reason for the error/warning message is because a void function, by definition, does not return a value. All integer constants of unsigned type should have 'U' suffix. V1096. V1041. A minor scale definition: am I missing something? Compiler may optimize out this loop or make it infinite. All memory or resources allocated dynamically should be explicitly released. V830. V1020. Cast should not convert a pointer to a function to any other pointer type, including a pointer to function type. V641. V203. It's possible that the line was commented out improperly, thus altering the program's operation logics. MISRA. The closing tag was encountered, while the tag was expected. V6049. Two similar code fragments were found. V3151. The result of the right shift operation will always be 0. Suspicious type conversion: HRESULT -> BOOL (BOOL -> HRESULT). Probably meant: '\xNN'. V5304. The expression of strlen(MyStr.c_str()) kind can be rewritten as MyStr.length(). Check the following code block after the 'if' statement. Expression under 'throw' is a potential null, which can lead to NullReferenceException. Loop break conditions do not depend on the number of iterations. Suspicious literal: '/r'. V2523. Expression of the 'A - B > 0' kind will work as 'A != B'. Temporary anonymous object is used. nlohmann/json.hpp:20017:5: warning: non-void function does not return a value in all control paths [-Wreturn-type], reference operator[](T* key) nlohmann/json.hpp:11996:5: warning: non-void function does not return a value in all control paths [-Wreturn-type], static ReferenceType get_ref_impl(ThisType& obj) Possible incorrect order of arguments passed to method. V3017. warning: non-void function does not return a value Naimur Rahman 44 subscribers Subscribe 1 Share 316 views 6 months ago warning: non-void function does not return a value Show more Show more. Expression's value is copied at the variable declaration. operators are used for accessing members of the same object. The name of 'X' field/property in a nested type is ambiguous. Identifiers declared in the same scope and name space should be distinct. V802. The double result is stored in fraction, then printed. Return value of 'Foo' function is required to be used. V6103. V794. In this case, the return value of the called function is undefined. Declaration should contain no more than two levels of pointer nesting. Nonsensical comparison: pointer < 0. V2597. V637. Potential logical error. A global object variable is declared in the header. V3041. Use _beginthreadex/_endthreadex functions instead of CreateThread/ExitThread functions. This file is marked with copyleft license, which requires you to open the derived source code. It is odd that the body of 'Foo_1' function is fully equivalent to the body of 'Foo_2' function. Consider inspecting the 'T foo = foo = x;' expression. V1052. V6042. 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; ). V781. If total energies differ across different software, how do I decide which software to use? Use of potentially tainted data in configuration may lead to security issues. V564. MISRA. Parts of an SQL query are not delimited by any separators or whitespaces. Consider inspecting signed and unsigned function arguments. V6011. MISRA. It is possible that an error is present. The 'throw' operator does not have any arguments and is not located within the 'catch' block. Consider inspecting the '? It is possible that these are misprints and 'default:' label should be used instead. Consequently, the function needs to have a statement that returns the object of the corresponding type. The opposite operator must also be defined. The version of your suppress file is outdated. An alternative would be to have the default setting of Wreturn-type depend on flag_isoc99. V3525. V5625. V529. The sizeof() operator returns pointer size instead of array size. This way, you won't miss messages from our team in the future. Use of uninitialized variable 'Foo'. Function 'Foo' writes/reads 'N' bytes. V3518. V1076. Incorrect index type: 'foo[not a memsize-type]'. V6092. If a function returns no meaningful value, it should be declared with return type void. V604. An excessive expression. It is probably unused, uninitialized, or already locked. The analyzer has detected a non-void function with an execution path that does not return a value. V3501. V3514. Insecure XML parser is used to process potentially tainted data. The '#pragma warning(push/pop)' should be used instead. V6105. V629. OWASP. V684. V2536. Using 'std::move' function's with const object disables move semantics. No return statement is required. Let's consider an example. V2524. V105. 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. V1081. V644. A function name may be missing. Parameter 'A' is always rewritten in method body before being used. V5623. V732. V5012. The standard signal handling functions should not be used. V791. Uppercase (lowercase) string is compared with a different lowercase (uppercase) string. Generating points along line with specifying the origin of point generation in QGIS. Sign in to comment V2584. V582. V531. V2515. A value is being subtracted from the unsigned variable. V2534. V517. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Cast should not remove 'const' qualifier from the type that is pointed to by a pointer or a reference. A value-returning function should include a return statement, containing an expression. to your account, const typename object_t::key_type& key() const MISRA. Cannot determine active configuration for project. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. V589. Awaiting on expression with potential null value can lead to throwing of 'NullReferenceException'. No more than one iteration of the loop will be performed. The macro with the 'setjmp' name and the function with the 'longjmp' name should not be used. BSTR string becomes invalid. Constructor parameter is not used. MISRA. Suspicious sequence of types castings: pointer -> memsize -> 32-bit integer. AUTOSAR. P.S. Consider inspecting the first parameter of 'getline' function. V1074. V3039. The 'if' 'else if' construct should be terminated with an 'else' statement. V005. Object created using 'new' operator is immediately cast to another type. V3103. Every 'switch' statement should contain non-empty switch-clauses. AUTOSAR. V809. Consider checking the first actual argument of the 'Foo' function. MISRA. Generic Doubly-Linked-Lists C implementation. A Function procedure has at least one possible path through its code that does not return a value. MISRA. V2573. Features from should not be used. Single-bit bit fields should not be declared as signed type.
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