Identifiers that start with '__' or '_[A-Z]' are reserved. Parts of an SQL query are not delimited by any separators or whitespaces. Type casting is used 2 times in a row. Consider declaring it as a reference. Consider inspecting the expression. Consider inspecting the expression for function call. V2520. A minor scale definition: am I missing something? V3551. So, the compiler generates an error. It is possible that a wrong variable is incremented inside the 'for' operator. Potential resurrection of 'this' object instance from destructor. V5002. V1078. The expression contains a suspicious mix of integer and real types. The function expects the file to be opened in one mode, but it was opened in different mode. You signed in with another tab or window. External object or function should be declared once in one and only one file. Call of the 'Foo' function will lead to buffer overflow. V1050. V1010. V1011. Compound assignment expression 'X += X + N' is suspicious. V3176. Literal suffixes should not contain lowercase characters. V106. V6079. The '\0xNN' characters were encountered. rev2023.4.21.43403. V2511. Use of uninitialized variable 'Foo'. Inspect the Nth argument. Return value of 'Foo' function is required to be used. See NN argument of function 'Foo' in derived class and base class. Correction-related comments will be deleted after processing to help reduce clutter. Check lines: N1, N2. V2564. MISRA. V510. Casting potential 'null' value to a value type can lead to NullReferenceException. V773. V1092. Looking at the assembly GCC 11.2 generates for this with -O3, we see it has in fact recognized that the union of all cases in the if and else if covers all possibilities: It has generated only two code paths, not three. Unsafe invocation of event, NullReferenceException is possible. Keyword 'nullptr' can be used for 'pointer' type exception. Operation is executed 3 or more times in a row. It will be closed before the method exits. Probably the '-=' should be used here. A pattern was detected: A || (A && ). The 'X' variable was not initialized. EOF should not be compared with a value of the 'char' type. The switch statement does not cover all values of the enum. It is possible that different variables are used inside initializer and iterator. Consider inspecting the expression. The 'operator &&', 'operator ||', 'operator ,' and the unary 'operator &' should not be overloaded. 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. the platforms: Continuous use of the analyzer in software development, Deploying the analyzer in cloud Continuous Integration services, Additional configuration and resolving issues. The variable 'X' is being used for this loop and for the outer loop. Bounds should not contain size of a buffer, but a number of characters it can hold. MISRA. It is possible that 'else' block was forgotten or commented out, thus altering the program's operation logics. Not the answer you're looking for? V007. V206. The 'Foo(Foo)' class member is initialized with itself. Check for typos. V2591. Function returns pointer/reference to temporary local object. The SUCCEEDED or FAILED macro should be used instead. MISRA. Consider inspecting the 'switch' statement. Odd semicolon ';' after 'if/for/while' operator. V3502. Value of a variable is checked after it is used. Consider replacing the call to the 'at()' method with the 'operator[]'. Consider inspecting the function. V1059. V3115. On 32-bit/64-bit platform, structure size can be reduced from N to K bytes by rearranging the fields according to their sizes in decreasing order. 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. V699. It is safer to use the 'foo' function. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. V3171. V2578. Why does flowing off the end of a non-void function without returning a value not produce a compiler error? V2506. V6099. Does a password policy with a restriction of repeated characters increase security? V3512. The value is out of range of enum values. The first 'if' statement contains method return. MISRA. The '&=' or '|=' operator is redundant because the right operand is always true/false. V3109. V3094. New variable with default value is created instead of 'std::unique_lock' that locks on the mutex. Odd use of special character in regular expression. It is possible that macro expansion resulted in incorrect evaluation order. V2521. Consider replacing 'const T' with 'const .. &T' / 'const .. *T'. V2559. V1053. OWASP. Consider using the KK constant. V1060. Suspicious access to element by a constant index inside a loop. WPF: writing and reading are performed on a different Dependency Properties. The passing of data to or from this function may be affected. V695. The object could have been garbage collected before the 'Target' property was accessed. V3096. V5617. V2542. V1093. V805. MISRA. AUTOSAR. The 'zero' value is assigned to pointer. Consider using a comparison with defined precision: fabs(A - B) < Epsilon or fabs(A - B) > Epsilon. Logical literal belongs to second operator with a higher priority. V788. V505. Consider inspecting the expression. Dangerous construction is used: 'm[x] = m.size()', where 'm' is of 'T' class. AUTOSAR. Exception is of the 'int' type because NULL is defined as 0. Unreachable code detected. V3057. Function body contains the 'X' label that is not used by any 'goto' statements. Consider inspecting virtual function arguments. V617. The 'swap' function may interchange a variable with itself. The use of 'if (A) {} else if (A) {}' pattern was detected. The function with the 'abort/exit/getenv/system' name should not be used. MISRA. The '<' operator should probably be replaced with '<<'. V2527. It is suspicious that the value 'X' of HRESULT type is compared with 'Y'. V544. Do not use real-type variables as loop counters. If total energies differ across different software, how do I decide which software to use? Member invocation on this value may lead to an exception. Consider inspecting the expression. It's odd that this method always returns one and the same value of NN. Potentially tainted data is used in a search filter. Consider refactoring the 'Foo' function. Usage of non memsize type for pointer arithmetic. A few are mentioned below: . MISRA. V691. The 'else' keyword may be missing. V1037. V707. OWASP. It makes code less human error prone. The Ctor(SerializationInfo, StreamingContext) constructor is missing. Exception caught by handler for base class. MISRA. Loop break conditions do not depend on the number of iterations. Expression resulting from the macro expansion should be surrounded by parentheses. The ', " or \ characters and the /* or // character sequences should not occur in a header file name. Consider replacing this function with 'std::uncaught_exceptions'. The function located to the right of the '|' and '&' operators will be called regardless of the value of the left operand. OWASP. The use of 'if (A) {} else if (A) {}' pattern was detected. V6013. Consider refactoring the code. Making statements based on opinion; back them up with references or personal experience. Object is used as an argument to its own method. Understanding the probability of measurement w.r.t. Argument of the '|' bitwise operation always contains non-zero value. This may lead to undefined behavior. V690. V5301. V3059. 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 . 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. V571. Parameter of 'CancellationToken' type is not used inside function's body. V009. The other function parameter expects a file path instead. This is the same thing that happens at the end of the function anyway. Memory allocation will lead to an exception. The 'A' class containing IDisposable members does not itself implement IDisposable. V5606. The 'if/if-else/for/while/foreach' statement and code block after it are not related. The 'Foo' function is called twice to deallocate the same resource. Suspicious sequence of types castings: memsize -> 32-bit integer -> memsize. V550. Pointer is dereferenced on the initialization list before its check for null inside the body of a constructor function. C-style and functional notation casts should not be performed. Suspicious function declaration. V6089. The version of your suppress file is outdated. int sometimes ( int x) { if (x > 0) { return 2*x; } } V724. Consider allocating it on the stack instead. Possible SQL injection. Was Aristarchus the first to propose heliocentrism? Decreased performance. If total energies differ across different software, how do I decide which software to use? Perhaps the '??' Then, enable it by default, but also make it be enabled by Wpedantic and Wreturn-type. It is possible that 'i < X.size()' should be used instead of 'X.size()'. Possibly, it was intended to be escaped. This can cause concurrency issues. V1008. It is dangerous to create a local variable within a loop with a same name as a variable controlling this loop. The sizeof() operator returns pointer size instead of array size. V2581. The expression is excessive or contains a logical error. It is possible that a typo is present inside the expression. After each of these function calls, execution continues at the next statement. MISRA. V3189. V599. Lowercase 'L' at the end of a long literal can be mistaken for '1'. V2583. Use of jump statements in 'finally' block can lead to the loss of unhandled exceptions. Parameter is not utilized inside method's body. An item with the same key has already been added. AUTOSAR. Suspicious string consisting of two parts is used for initialization. I am interested to try it on V303. Email? Both operands of the '??' The 'static' keyword shall not be used between [] in the declaration of an array parameter. Consider implementing event accessors explicitly or use 'sealed' keyword. An enumeration was declared with 'Flags' attribute, but does not set any initializers to override default values. For more information, see Return type. The expression of strlen(MyStr.c_str()) kind can be rewritten as MyStr.length(). Memsize type is used in the struct/class. Constant expression evaluation should not result in an unsigned integer wrap-around. Only the first member of enumerator list should be explicitly initialized, unless all members are explicitly initialized. V737. The 'operator &&', 'operator ||', 'operator ,' and the unary 'operator &' should not be overloaded. V6066. V124. Array indexing should be the only form of pointer arithmetic and it should be applied only to objects defined as an array type. Suspicious use of BigDecimal class. V1027. V661. Suspicious return of an always empty collection. This condition was already verified in previous line. The outer type contains static field/property with identical name. Consider utilizing 64-bit compiler if possible. V3045. V3522. V6070. OWASP. V680. Recurring sequence of explicit type casts. It is better to redefine the N function argument as a reference. As report_square takes no parameters and returns void, we don't assign its result to a variable. V723. If a function sometimes forgets to return a result, you will get a warning (if you have requested warnings). V576. Serialization order of fields should be preserved during deserialization. OWASP. It causes the function to return to the caller immediately. The VARIANT_BOOL type is used incorrectly. To use free version of PVS-Studio, source code files are required to start with a special comment. 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). Character escape is used in multicharacter literal. V3093. Potential Java SE API compatibility issue. The 'value' parameter is rewritten inside a property setter, and is not used after that. V2606. V1004. V1088. V3103. Structures with members of real type are compared byte-wise. Decreased performance. Dangerous cast of 'this' to 'void*' type in the 'Base' class, as it is followed by a subsequent cast to 'Class' type. Parameter is always rewritten in function body before being used. It is suspicious that the assignment operator takes an object by a non-constant reference and returns this object. Property setter / event accessor does not utilize its 'value' parameter. V1065. Shift by N bits is inconsistent with the size of type. The 'strcmp' function returns 0 if corresponding strings are equal. V5613. Explicit conversion of pointer type to 32-bit integer type. Possibly an incorrect HTML. Check lines: N1, N2. Which language's style guidelines should be used when writing code that is supposed to be called from another language? V3547. OWASP. Potentially tainted data is used to create query. AUTOSAR. Some of the references in project are missing or incorrect. All memory or resources allocated dynamically should be explicitly released. Decreased performance. V2601. V3508. V6015. A Function procedure has at least one possible path through its code that does not return a value. I recently fixed something similar in #2898 which is not yet merged. V1089. V587. Empirical analysis. V3041. Decreased performance. V586. Dozens of bugs have been opened for this . V686. Stack of original exception could be lost. Consider using a comparison with defined precision: Math.abs(A - B) < Epsilon or Math.abs(A - B) > Epsilon. OWASP. MISRA. We know it knows for two reasons. triniChillibibi 2 yr. ago This was for my print_winner function in runoff. Consider reviewing the source code that uses the container. V6073. Potential XXE vulnerability. The argument of the method is not expected to be null. Multiple copies of it will be created in all translation units that include this header file. Parameter of 'std::stop_token' type is not used inside function's body. A write outside the bounds of this variable may occur. Consider using an explicit type cast to avoid overflow or loss of a fractional part. Consider inspecting the 'for' operator. The standard signal handling functions should not be used. Use the RtlSecureZeroMemory() function to erase private data. AUTOSAR. Recurring check. V504. V6059. MISRA. V201. V1080. The best answers are voted up and rise to the top, Not the answer you're looking for? Consider inspecting the expression. It is possible that 'else' block was forgotten or commented out, thus altering the program's operation logics. Thanks for contributing an answer to Stack Overflow! V3548. An odd sequence of assignments of this kind: A = B; B = A; V3038. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. V6095. The report_ratio function has a void return type, so it doesn't need to explicitly return a value. Unary minus operator should not be applied to an expression of the unsigned type. Unlike this recommendation, that rule is restricted to functions from the Standard C library. Consider inspecting the first parameter of 'getline' function. Storing credentials inside source code can lead to security issues. V3554. V2551. Perhaps, this is a typo and 'X' variable should be used instead of 'Y'. V2532. Not all IDisposable members are properly disposed. Consider replacing the use of 'std::optional::value()' with either the '*' or '->' operator. Result of this expression will be implicitly cast to 'Type'. Suspicious precise comparison. Number of elements in the allocated array equals the size of a pointer in bytes. Making statements based on opinion; back them up with references or personal experience. Consider inspecting this expression. V592. V3117. Undefined behavior will occur in case of signed integer overflow. The '+' operation is executed. It is possible that an assigned variable should be checked in the next condition. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. V5622. V2610. V5616. Can the game be left in an invalid state if all state-based actions are replaced? MISRA. It is suspicious that the result of the statement is a part of the condition. Do not concatenate string literals with different prefixes. V3175. V1081. Empirical analysis. All I want the function to do is add one to the value of the each character inputted into the string array and shift it on the ASCII table and then return the coded message. V503. Consider inspecting the expression. Possible XPath injection. Suspicious division. Implicit type conversion from enum type to integer type. the first printHi() in the above example), were calling a function for its behavior, not its return value. Let's consider an example. Likewise, report_ratio returns void, so we don't save its return value, either. Why did US v. Assange skip the court of appeal? Possibly an equality comparison was intended. V1024. Use volatile variable(s) or synchronization primitives to avoid this. Potential insecure deserialization vulnerability. V678. Thus, the warning is a very useful one and you should consider yourself lucky that the compiler noticed the bug. MISRA. This is your promo code! WPF: readonly field of 'DependencyProperty' type is not initialized. MISRA. V2576. Label is present inside switch(). V3503. V3505. Dereferencing the result of 'as' operator can lead to NullReferenceException. 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. It is more efficient to catch exception by reference rather than by value. Two or more case-branches perform the same actions. This may lead to ODR violation. Consider replacing the expression 'AA' with 'BB'. V1013. Inspect the program's logic. V5304. V625. The 'goto' statement shouldn't jump to a label declared earlier. V3060. Use of constant NN. V635. Consider inspecting the loop expression. What "benchmarks" means in "what are benchmarks for?". V556. V3025. It's possible that the line was commented out improperly, thus altering the program's operation logics. Decreased performance. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. V1063. Non-atomic modification of volatile variable. It may happen that flow is never reaching that part of the code but it is important to write for the compiler. The 'a' variable was used after it was assigned through null-conditional operator. The value is assigned to the 'x' variable but is not used. Some types of expressions require values. Object was created but is not used. V3553. V630. V523. AUTOSAR. Perhaps, 'ThenBy' should be used instead. MISRA. The compiler may issue a warning diagnostic message about unreachable code if it finds any statements placed after the return statement. V3188. Calling an overridden method in parent-class constructor may lead to use of uninitialized data. Consider using parentheses in the expression. V1070. V604. Suspicious semicolon ';' after 'if/for/while' operator. Consequently, the compiler will flag this as an error. Quoting from gcc warning options page: -Wno-unused-result. V1029. 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. P.S. Why does Acts not mention the deaths of Peter and Paul? I am getting this error when trying to compile the below code. Part of conditional expression is always true/false. Incorrect diagnostics are possible. It is possible that a backslash should be used instead: '\r'. The name of 'X' field/property in a nested type is ambiguous. Functions of strcmp() kind can return any values, not only -1, 0, or 1. Decreased performance. AUTOSAR. If the 'GetSign' function receives 0, undefined behavior will occur. B is never printed because the statement never executes. Expression's value is copied at the variable declaration. Void functions don't need a return statement A void function will automatically return to the caller at the end of the function. Connect and share knowledge within a single location that is structured and easy to search. V3073. It is possible that an incorrect variable is compared with null after type conversion using 'as' keyword. Consider inspecting the loop expression. Unable to start the analysis on this file. An identifier with array type passed as a function argument should not decay to a pointer. Since the function doesnt return a value, this is fine. Size of the 'time_t' type is not 64 bits. V3118. V2011. Non-void functions are required to have a return type. V562. V677. Check lines: N1, N2. MISRA. MISRA. What happens to the returned value, if one is specified, depends on the implementation. V2002. Values of different enum types are compared. V1062. Parameter 'A' is always rewritten in method body before being used. MISRA. The warnings you describe only occur if you do not leave the scope, but let the control flow reach its end without returning a value. Suspicious pointer arithmetic with 'malloc/new'. Assign the value to the Function procedure name and then perform an Exit Function statement. Collection is modified while iteration is in progress. Consider inspecting conditional expression of the loop. V2590. MISRA. V689. Argument of abs() function is minimal negative value. V651. Abnormality within similar comparisons. Decreased performance. Consider checking for typos. V6097. Priority of the '&&' operator is higher than that of the '||' operator. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? V2562. The hyperbolic space is a conformally compact Einstein manifold. V6096. Functions should be declared in prototype form with named parameters. Odd semicolon ';' after 'if/for/while' operator. It is possible that other value should be present instead of '0'. All analyzer messages were filtered out or marked as false positive. V6046. Casting expression to 'X' type before implicitly casting it to other type may be excessive or incorrect. check your Spam/Junk folder and click the "Not Spam" button for our message. 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). We discuss the debate over early returns in lesson 7.10 -- Break and continue. Thanks for contributing an answer to Stack Overflow! V3066. The size of the dynamic array can be less than the number of elements in the initializer. V3053. A function with a non-void return type must return an answer no matter what its parameters are. The resource was acquired using 'X' function but was released using incompatible 'Y' function. V672. The pointer in the expression equals nullptr. The 'X' counter is not used inside a nested loop. Number of iterations in loop equals size of a pointer. V1061. V1042. V1073. It's possible that ',' should be replaced by ';'. V1055. V3081. V5604. V3004. Value of variable is not modified. Incorrect index type: 'foo[not a memsize-type]'. Inconsistent synchronization of a field. Consider inspecting the expression. V1049. V507. V822. The object was created but it is not being used. Octal and hexadecimal escape sequences should be terminated. All conditional inclusion preprocessor directives should reside in the same file as the conditional inclusion directive to which they are related. If a function returns no meaningful value, it should be declared with return type void. To learn more, see our tips on writing great answers. V3098. Expression of the 'A =- B' kind is used. 1. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? Variable is not passed into foreach loop by reference, but its value is changed inside of the loop. V704. Annotation that does not have 'RUNTIME' retention policy will not be accessible through Reflection API. Octal constants should not be used.
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