V105. MISRA. Creating an object with placement new requires a buffer of large size. Consider inspecting virtual function arguments. V5013. [Serializable] attribute is missing. V627. V824. Do not warn if a caller of a function marked with attribute warn_unused_result (see Variable Attributes) does not use its return value. Function execution could be deferred. V681. Odd use of special character in regular expression. Making statements based on opinion; back them up with references or personal experience. Expression contains a suspicious mix of integer and real types. Decreased performance. Consider inspecting the application's logic. The left operand of integer division is less than the right one. V6044. Two or more case-branches perform the same actions. V2014. When we call a function in a context that requires a value (e.g. It is more effective to use the prefix form of ++it. Uninitialized class member is used to initialize another member. Flexible array members should not be declared. V3503. If you have a C++ program missing a return statement from a function that is supposed to return a value, g++ will compile it happily with no errors (or even a warning, unless -Wreturn-type or -Wall is used). V3555. Consider inspecting the NNth argument of the 'Foo' function. V2554. All analyzer messages were filtered out or marked as false positive. OWASP. OWASP. MISRA. Single-line comments should not end with a continuation token. Object slicing. MISRA. It is possible that this 'else' branch must apply to the previous 'if' statement. V2602. Recurring sequence of explicit type casts. V2002. Likewise, report_ratio returns void, so we don't save its return value, either. Memory allocation and deallocation functions should not be used. This will cause the loss of the higher bits. V622. V6041. Expression used in condition should have essential Boolean type. V3526. A 32-bit variable is utilized as a reference to a pointer. Use of the throw (a, b); pattern. The return value of function 'Foo' is required to be utilized. V668. Incorrect index type: 'foo[not a memsize-type]'. Custom declaration of standard type. V3181. MISRA. V3088. The 'X' counter is not used inside a nested loop. Consider inspecting it for a possible error. Recurrent serialization will use cached object state from first serialization. It is possible that different variables are used inside initializer and iterator. Consider checking the N format items of the 'Foo' function. MISRA. V3507. This pattern is suspicious. V784. V732. The return value of non-void function should be used. MISRA. The opposite operator must also be defined. V616. V6006. Boundary between numeric escape sequence and string is unclear. Consider checking the first actual argument of the 'Foo' function. It is suspicious that the argument of sizeof() operator is the expression. V3104. How do I count the number of sentences in C using ". rev2023.4.21.43403. V2581. V3157. Correction-related comments will be deleted after processing to help reduce clutter. Consider assigning realloc() to a temporary pointer. Assigning potentially negative or large value as timeout of HTTP session can lead to excessive session expiration time. It is suspicious that the result of the statement is a part of the condition. OWASP. Consider utilizing an explicit type cast to avoid the loss of a fractional part. Class initialization cycle is present. An 'else' branch may apply to the previous 'if' statement. V2559. Connect and share knowledge within a single location that is structured and easy to search. V2583. A non-serializable class should not be serialized. Operands of the logical '&&' or the '||' operators, the '!' V3003. Casting potential 'null' value to a value type can lead to NullReferenceException. V3039. V3024. A memory/resource leak is possible. Octal constants should not be used. V2593. Consider using a comparison with defined precision: fabs(A - B) < Epsilon or fabs(A - B) > Epsilon. An excessive check can be simplified. V709. V1065. V2019. V660. OWASP. The SUCCEEDED or FAILED macro should be used instead. V6083. Potentially unsafe double-checked locking. 'Dispose' will be invoked before exiting method. Implicitly specified enumeration constants should be unique consider specifying non-unique constants explicitly. 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. V672. Cast should not remove 'const' / 'volatile' qualification from the type that is pointed to by a pointer or a reference. The 'Foo' function is called twice to deallocate the same resource. Incorrect format. Consider inspecting 'X'. Probably the '!=' should be used here. V3084. V5627. Use of constant NN. Constant expression in switch statement. V3147. 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 size of the bit mask is less than the size of the first operand. Check lines: N1, N2. Use 'memmove' function. Unreachable code should not be present in the project. Syntax: return[expression]; There are various ways to use return statements. V6055. V119. MISRA. V3002. Identical expression to the left and to the right of compound assignment. V3054. V128. Consider implementing event accessors explicitly or use 'sealed' keyword. Potentially tainted data is used to create an object using deserialization. V2598. Casts between a pointer to an incomplete type and any other type shouldn't be performed. V684. Same value is present on both sides of the operator. Suspicious access to element by a constant index inside a loop. Consider inspecting the expression. Storing credentials inside source code can lead to security issues. Find centralized, trusted content and collaborate around the technologies you use most. Decreased performance. V5611. V3539. As report_square takes no parameters and returns void, we don't assign its result to a variable. 'else' keyword is probably missing. English version of Russian proverb "The hedgehogs got pricked, cried, but continued to eat the cactus". V3047. Consider inspecting the condition for mistakes. V702. OWASP. Converting integers or pointers to BOOL can lead to a loss of high-order bits. Consider inspecting the expression. Dangerous widening type conversion from an array of derived-class objects to a base-class pointer. Comparing value type variables with 'ReferenceEquals' is incorrect because compared values will be boxed. I recently fixed something similar in #2898 which is not yet merged. Variable is used after it is moved. V651. V2525. V6049. The variable of char type is compared with pointer to string. Locking operations must be performed on the same thread. V3078. V2617. There should be no user-defined variadic functions. V3502. Buffer size is not a multiple of element size. A part of conditional expression is always true/false if it is evaluated. Consider replacing 'const T' with 'const .. &T' / 'const .. *T'. V6096. Pointer to FILE should not be dereferenced. V3130. V106. Exception is of the 'int' type because NULL is defined as 0. V563. Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? This value is already assigned to the 'b' variable. Inline functions should be declared with the static storage class. Possible SQL injection. V3020. V3035. Thanks for contributing an answer to Stack Overflow! Are you missing a 'Return' statement? V1070. MISRA. Keyword 'nullptr' can be used for 'pointer' type exception. MISRA. Consider assigning value to 'foo' variable instead of declaring it anew. V3175. MISRA. V1023. Thread.sleep() inside synchronized block/method may cause decreased performance. Code contains invisible characters that may alter its logic. A minor scale definition: am I missing something? It is possible that a typo is present inside the string literal. See NN argument of function 'Foo' in derived class and base class. V207. Octal and hexadecimal escape sequences should be terminated. malloc() function accepts a dangerous expression in the capacity of an argument. There is nothing we can do in this situation - there are no default values to return in case of exceptions. V6099. AUTOSAR. Does this function have explicit return values on all control paths? Inspect the program's logic. There should be no implicit integral-floating conversion. V5002. Temporary anonymous object is used. The 'default' label should be either the first or the last label of a 'switch' statement. Size of an array is not specified. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Possible excessive expression or typo. If you haven't received our response, please do the following: V1021. V3146. V1064. This can result in confusion. Function marked as 'noreturn' may return control. density matrix. Consider inspecting the expression. MISRA. Only values returned from fgetpos() can be used as arguments to fsetpos(). Is that what you want? Consider inspecting the expression. Expressions with enum underlying type should have values corresponding to the enumerators of the enumeration. The ', " or \ characters and the /* or // character sequences should not occur in a header file name. Expression was implicitly cast from integer type to real type. V1034. The '?.' The 'while' operator has empty body. The operator '||' operator is surrounded by opposite expressions 'x' and '!x'. Pointer was used before its check for nullptr. What differentiates living as mere roommates from living in a marriage-like relationship? V583. Possible incorrect order of arguments passed to method. Can the game be left in an invalid state if all state-based actions are replaced? Array size should be specified explicitly when array declaration uses designated initialization. Multiple copies of it will be created in all translation units that include this header file. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Consider checking for typos. The assignment to a member of the readonly field will have no effect when the field is of a value type. C-style explicit type casting is utilized. It is highly probable that the semicolon ';' is missing after 'return' keyword. V107. There is a probability of logical error presence. Variable should be declared in a scope that minimizes its visibility. MISRA. The variable is assigned but is not used by the end of the function. V513. V6021. Possible overflow. V772. It is suspicious that the 'foo' field in derived class overwrites field in base class. Suspicious getter/setter implementation. The body of a loop\conditional statement should be enclosed in braces. V5616. V6078. V2519. V125. V2549. V3549. V2565. V778. A 'break' statement is probably missing in a 'switch' statement. The pointer in the expression equals nullptr. V2003. Such a statement will cause the function to return to the caller when the return statement is executed (before the function would otherwise return to the caller, hence, early). Suspicious assignment inside the conditional expression of 'if/while/dowhile' statement. V204. V1068. Anonymous function is used to unsubscribe from event. V617. MISRA. :' operator may not work as expected. V3027. MISRA. Consider adding '[Flags]' attribute to the enum. V3028. The value is assigned to the 'x' variable but is not used. Consider using 'std::move' instead. The function with the 'qsort/bsearch' name should not be used. All memory or resources allocated dynamically should be explicitly released. V3515. Why does an overridden function in the derived class hide other overloads of the base class? Usage of a suspicious mutex wrapper. MISRA. V2502. Make sure the expression is correct. A few are mentioned below: . V2510. V3143. Perhaps, this is a typo and 'X' variable should be used instead of 'Y'. The 'swap' function may interchange a variable with itself. V2610. return expressionopt ; The value of expression, if present, is returned to the calling function. AUTOSAR. Replace iterator++ with ++iterator. It is possible that the 'i' variable should be incremented instead of the 'n' variable. Suspicious return of an always empty collection. Strings were concatenated but not used. Calling element access method for potentially empty collection may result in exception. V640. If an expression is not given on a return statement in a function declared with a non- void return type, the compiler issues a warning message. Pattern A || (A && ) was detected. Use volatile variable(s) or synchronization primitives to avoid this. V3553. OWASP. V3063. Analysis of 'Makefile/Utility' type projects is not supported in this tool. By cv void, it simply means a function with void return type, that may be const or volatile. Undefined behavior will occur in case of signed integer overflow. Thus, the warning is a very useful one and you should consider yourself lucky that the compiler noticed the bug. Function call may lead to buffer overflow. Size of every element in X array is not equal to divisor. Not the answer you're looking for? In such a context, we can only call value-returning functions. V572. V6033. Loop break conditions do not depend on the number of iterations. The result should possibly be saved to a temporary variable, which then could be used while calling the 'B' function. MISRA. triniChillibibi 2 yr. ago This was for my print_winner function in runoff. V5305. V5624. Overflow check is incorrect. OWASP. V641. rev2023.4.21.43403. AUTOSAR. V6005. std::cout doesnt know how to handle this (what value would it output?). Unlike this recommendation, that rule is restricted to functions from the Standard C library. V1060. V2548. V1093. The best answers are voted up and rise to the top, Not the answer you're looking for? V3153. The function with the 'atof/atoi/atol/atoll' name should not be used. OWASP. Consider inspecting the expression. Variable of the 'string_view' type references a temporary object, which will be removed after evaluation of an expression. V3167. See N argument of function 'foo' in derived class 'derived' and base class 'base'. AUTOSAR. 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. Variable 'foo' was assigned the same value. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? V648. The values used in expressions should have appropriate essential types. Sign in to comment The first call to printHi() is called in a context that does not require a value. V749. V5008. The value is out of range of enum values. Appending new suppressed messages to it is not possible. This expression can be simplified. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Incorrect type of a loop variable. V515. OWASP. The expression is excessive or contains a misprint. Suspicious string consisting of two parts is used for initialization. Use of outdated cryptographic algorithm is not recommended. It's possible that an assigned variable should be checked in the next condition. Waiting on condition variable without predicate. Memory allocation will lead to an exception. Cast should not remove 'volatile' qualifier from the type that is pointed to by a pointer or a reference. The 'sizeof' expression returns the size of the container type, not the number of elements. The 'zero' value is assigned to pointer. V727. It is possible that 'i < X.size()' should be used instead of 'X.size()'. The signature of method 'X' does not conform to serialization requirements. V2618. Potentially tainted data is used in the path toextractthe file. All conditional inclusion preprocessor directives should reside in the same file as the conditional inclusion directive to which they are related. It is more efficient to catch exception by reference rather than by value. MISRA. Potentially tainted data is used in a search filter. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Probably meant: *ptr != zero. If no value is provided, the compiler will produce a syntax error. How to enter the PVS-Studio license and what's the next move, Release history for previous versions (before 7.00), Getting acquainted with the PVS-Studio static code analyzer on Windows, Build-system independent analysis (C and C++), Direct integration of the analyzer into build automation systems (C and C++), PVS-Studio C# installation on Linux and macOS, How to run PVS-Studio C# on Linux and macOS, Installing and updating PVS-Studio C++ on Linux, Installing and updating PVS-Studio C++ on macOS, How to run PVS-Studio C++ on Linux and macOS, Get started with PVS-Studio in Visual Studio, Using PVS-Studio with JetBrains Rider and CLion, Analyzing Visual Studio / MSBuild / .NET projects from the command line using PVS-Studio, Cross-platform analysis of C and C++ projects in PVS-Studio, How to use the OWASP diagnostic group in PVS-Studio, Analysis of C++ projects based on JSON Compilation Database, How to integrate PVS-Studio into CMake with a CMake module, How to analyze Unity projects with PVS-Studio, Integration of PVS-Studio analysis results into SonarQube, Speeding up the analysis of C and C++ code through distributed build systems (Incredibuild), How to display the analyzer's most interesting warnings, Baselining analysis results (suppressing warnings for existing code), Handling the diagnostic messages list in Visual Studio, How to view and convert analyzer's results, Viewing analysis results with C and C++ Compiler Monitoring UI, Notifying the developer teams (blame-notifier utility), Viewing reports in a SARIF format in Visual Studio Code, Filtering and handling the analyzer output through diagnostic configuration files (.pvsconfig), Excluding files and directories from analysis, Using the PVS-Studio extension for Visual Studio Code, How to use the PVS-Studio extension for Qt Creator, Analysis configuration file (Settings.xml). V3152. Every 'switch' statement should contain non-empty switch-clauses. V5618. V780. If the function has a void return type, this behavior is okay, but may be considered poor style. 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) Implicit assignment type conversion to memsize type. Class that contains pointers, constructor and destructor is copied by the automatically generated operator= or copy constructor. The identifier 'main' should not be used for a function other than the global function 'main'. Copying can be replaced with move/swap for optimization. The result of the right shift operation will always be 0. V2564. Unsafe usage of the 'bool' and integer types together in the operation '&='. External object or function should be declared once in one and only one file. Object created using 'new' operator is immediately cast to another type. The value of an expression is a potentially destroyed Unity object or null. It may happen that flow is never reaching that part of the code but it is important to write for the compiler. V3160. 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. Possible XSS vulnerability. Object should not be assigned or copied to an overlapping object. Does the 500-table limit still apply to the latest version of Cassandra? For more information, see Return type. Consider naming the object. Let's consider an example: V649. V3026. V550. It is possible that a typo is present inside the expression. These conditions may be true or false. V1042. V1045. We will email you at. The code's operational logic does not correspond with its formatting. Not the answer you're looking for? Storing credentials inside source code can lead to security issues. 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. Consider inspecting usage of 'Y' counter. V536. MISRA. V577. Iterators are passed as arguments to 'Foo' function. MISRA. V2531. Why Oracle let function (basic/nopipelined) without RETURN compile, and throws error in execution. The '#pragma warning(push/pop)' should be used instead. V817. V6084. V3113. V832. Decreased performance. The other function parameter expects a file path instead. V1056. V502. 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. Priority of the '&&' operator is higher than that of the '||' operator. V6072. MISRA. Variable is assigned but not used by the end of the function. 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. Loop break conditions do not depend on the number of iterations. For example: In the above example, the printHi function has a useful behavior (it prints Hi) but it doesnt need to return anything back to the caller. Why does Acts not mention the deaths of Peter and Paul? V1040. Silent suppression of exceptions can hide the presence of bugs in source code during testing. @Sneftel Good point. Priority of '&&' operation is higher than priority of '||' operation. What is scrcpy OTG mode and how does it work? V750. V3060. V765. Expression containing increment (++) or decrement (--) should not have other side effects. It is odd that the body of 'Foo_1' function is fully equivalent to the body of 'Foo_2' function. Check items X, Y, Z, in lines N1, N2, N3, V526. V2015. Dangerous call of 'Foo' function. Then the return statement is executed, returning the value of 5 back to the caller. V1058. V659. An abnormality within similar comparisons. Did the drapes in old theatres actually say "ASBESTOS" on them? V796. If you called exit instead of throw_blah from foo, for instance, it wouldn't issue the error. MISRA. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, If you are never going to return something, why do you declare the function as doing so? Ignored InterruptedException could lead to delayed thread shutdown. If you are treating warnings as errors, you may need to temporary disable that setting in order to compile the example. Potential logical error. If you cant find an answer to your question, fill in the form below and our developers will contact you. V3089. It's odd that this method always returns one and the same value of NN. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? MISRA. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. V2589. Identifiers declared in the same scope and name space should be distinct. The report_ratio function calls ratio with parameter values of 1 and INT_MAX. The function located to the right of the '|' and '&' operators will be called regardless of the value of the left operand. MISRA. Every 'switch' statement should have a 'default' label, which, in addition to the terminating 'break' statement, should contain either a statement or a comment. That's why, the analyzer will not issue a warning. Incorrect comparison of BOOL type variable with TRUE. Consider replacing this function with 'std::uncaught_exceptions'. V3007. Consider inspecting the expression. Operand of sizeof() operator should not have other side effects. V2543. If no return statement appears in a function definition, control automatically returns to the calling function after the last statement of the called function is executed. MISRA. Initial and final values of the iterator are the same. V1053. V3023. It is suspicious that the BSTR data type is compared using a relational operator. There are identical sub-expressions to the left and to the right of the 'foo' operator. Number of elements in the allocated array equals the size of a pointer in bytes. The assignment operator should be protected from the case of 'this == &src'. Consider assigning event to a local variable before invoking it. Member 'x' should point to string terminated by two 0 characters. A bool type variable is incremented. Possible path traversal vulnerability. My advice would be to create a new option Wreturn-pedantic. The 'then' statement is equivalent to the 'else' statement. Buffer overflow is possible. Any label should be declared in the same block as 'goto' statement or in any block enclosing it. :' operator uses constants from different enums. I forgot it would still issue if all paths don't have a return. V3086. OWASP. Consider replacing the use of 'std::optional::value()' with either the '*' or '->' operator. Possible use of left shift operator instead of comparison operator. Consider casting operands, not the result. V1003. V3159. V548. It's possible that ',' should be replaced by ';'. This leads to the variable binding to a temporary object instead of a range element. Expression resulting from the macro expansion should be surrounded by parentheses. The '\0xNN' characters were encountered. Then the return statement executes, and control returns back to the caller (main).
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