Consider using the 'Ptr' version of the 'foo' function here. V3016. OWASP. V6040. Decreased performance. Likewise, report_ratio returns void, so we don't save its return value, either. If you wish to call constructor, use 'this->Foo::Foo(.)'. V1088. V1093. V556. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. V2581. More than one sizeof() operator is used in one expression. V5603. The object is already of the same type. Conditional escape sequence in literal. Use 'double.isNaN()' method instead. Possible use of left shift operator instead of comparison operator. It's odd that this method always returns one and the same value of NN. V3042. Typedef names should be unique across all name spaces. The expression was implicitly cast from integer type to real type. V1092. V008. V3020. V006. Features from should not be used. AUTOSAR. It's better to use '= default;' syntax instead of empty body. The 'a % b' expression always evaluates to 0. V505. V6101. AUTOSAR. Memory allocation and deallocation functions should not be used. 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). Odd semicolon ';' after 'if/for/while' operator. How to Make a Black glass pass light through it? V3077. A void function will automatically return to the caller at the end of the function. It is possible that type name was omitted: throw MyException(a, b);. There is no point to declare constant reference to a number. Check for typos and consider using the 'default:' operator instead. It is not advised to declare type 'T' as 32-bit type. V5001. is there a trick to keep in mind when adding your own JSON_THROW? Possible server-side request forgery. Decreased performance. AUTOSAR. Unexpected uint64 behaviour 0xFFFF'FFFF'FFFF'FFFF - 1 = 0? Possible incorrect use of '#pragma warning(default: X)'. The analyzer has detected a non-void function with an execution path that does not return a value. V1013. Generating points along line with specifying the origin of point generation in QGIS. MISRA. 'Dispose' will be invoked before exiting method. The expression is always false. Suspicious code formatting. Check the array initialization. Number of iterations in loop equals size of a pointer. V828. error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type]} bool is_full() { if() { return 1; } else if() { return 0; } else if() { return 1; } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 : 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 . V2004. V5617. Consider inspecting this expression. The 'switch' statement should have 'default' as the last label. privacy statement. Unbounded functions performing string operations should not be used. V3519. Consequently, the compiler will flag this as an error. The '? Some types of expressions require values. V202. OWASP. Casts between a void pointer and an arithmetic type should not be performed. Comparing value type variables with 'ReferenceEquals' is incorrect because compared values will be boxed. It is possible that 'foo = bar == baz ? Consider inspecting it for a possible error. Object was created but is not used. 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. Potential use of invalid data. use custom JSON_THROW_USER without exceptions. V3154. Connect and share knowledge within a single location that is structured and easy to search. Consider inspecting the expression. Exception caught by handler for base class. V598. V6002. The 'then' statement is equivalent to the 'else' statement. Consider inspecting the 'for' operator. OWASP. 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. The function located to the right of the '|' and '&' operators will be called regardless of the value of the left operand. Function exited without performing epilogue actions. Probably meant: '(*pointer)++'. This file is marked with copyleft license, which requires you to open the derived source code. The 'strcmp' function returns 0 if corresponding strings are equal. V2549. MISRA. V727. V3024. Variable is declared as auto in C. Its default type is int. V712. The VARIANT_BOOL type is used incorrectly. The 'X' counter is not used inside a nested loop. V2534. This will result in undefined behavior. Thus, these functionsdo not result inundefined behavior. Decreased performance. The 'x' variable is assigned to itself. What should I follow, if two altimeters show different altitudes? The modulo by 1 operation is meaningless. MISRA. Two similar code fragments. V509. V2507. Consider inspecting the expression. Priority of '&&' operation is higher than priority of '||' operation. Consider verifying the compatibility of 32 and 64 bit versions of the application in the context of a stored data. 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? The predefined identifier '__func__' always contains the string 'operator()' inside function body of the overloaded 'operator()'. V821. Its priority is lower than priority of other operators in its left part. V529. V659. V3551. V655. Consider using of 'if-else' construct. Incorrect diagnostics are possible. AUTOSAR. Absolute values of both operands are equal. Pointer is compared with 'zero' value. A 'wchar_t *' type string is incorrectly converted to 'BSTR' type string. V6046. Comparison with 'double.NaN' is meaningless. Inappropriate attempt to append a null character to a string. The return value of function 'Foo' is required to be utilized. V3527. V5301. OWASP. The '? Type casting is used 2 times in a row. V648. V6049. V640. V3163. It demonstrates the return statement, and how it's used both to end function execution, and optionally, to return a value. Arrays should not be partially initialized. Thanks for helping to make the site better for everyone. Consider using a comparison with defined precision: Math.abs(A - B) < Epsilon or Math.abs(A - B) > Epsilon. V698. MISRA. It is possible that an incorrect variable is compared with null after type conversion using 'as' keyword. Consider replacing the call to the 'at()' method with the 'operator[]'. V6015. V6088. and '.' V3116. AUTOSAR. The variable is never modified. Variable should be declared in a scope that minimizes its visibility. Variable is not passed into foreach loop by reference, but its value is changed inside of the loop. V581. V3530. The '&' or '|' operator is applied to bool type value. As report_square takes no parameters and returns void, we don't assign its result to a variable. MISRA. V3097. A Function procedure has at least one possible path through its code that does not return a value. AUTOSAR. A new object is created, while a reference to an object is expected. Why did US v. Assange skip the court of appeal? Variable is of enum type. The 'static' storage class specifier should be used in all declarations of functions that have internal linkage. A function should not call itself either directly or indirectly. Potential insecure deserialization vulnerability. The expression of the 'char' type is passed as an argument of the 'A' type whereas similar overload with the string parameter exists. Its representation is implementation-defined. V2523. V6053. The expression is excessive or contains a logical error. V3145. V538. The object was created but it is not being used. Not the answer you're looking for? AUTOSAR. This return value is also printed. An excessive type cast or check. Using this sequence lead to undefined behavior. Learn more about Stack Overflow the company, and our products. A smart pointer may not destroy an object correctly. Consider inspecting the first parameter of 'getline' function. In this case, the return value of the called function is undefined. A value is being subtracted from the unsigned variable. Copying from potentially tainted data source. V2582. An abnormality within similar comparisons. Explicit conversion from 'float/double' type to signed integer type. V5305. V631. V3136. MISRA. V5610. V1040. It makes code less human error prone. The variable is assigned but is not used by the end of the function. MISRA. The operator '||' operator is surrounded by opposite expressions 'x' and '!x'. V3005. Functions' declarations with 'Foo' name differ in 'const' keyword only, while these functions' bodies have different composition. Possibly 'Total*' value was intended instead. however, it floods the compiler output. V2017. V6090. Casts between a pointer to an incomplete type and any other type shouldn't be performed. It may be an error. V1050. It is suspicious that the value 'X' of HRESULT type is compared with 'Y'. V3060. What is scrcpy OTG mode and how does it work? MISRA. External object or function should be declared once in one and only one file. Implicit type conversion from memsize to double type or vice versa. the platforms: Continuous use of the analyzer in software development, Deploying the analyzer in cloud Continuous Integration services, Additional configuration and resolving issues. The 'x' variable is assigned values twice successively. This can cause concurrency issues. There should be no implicit integral-floating conversion. MISRA. Consider checking the first actual argument of the 'Foo' function. V3052. And if candidate_count is 0 or negative it will return without a value at all (hence the error). This will cause the loss of the higher bits. Consider inspecting usage of 'Y' counter. The '//' and '/*' character sequences should not appear within comments. This is unexpected behavior. Referenced package contains vulnerability. V674. Expression contains a suspicious mix of integer and real types. So it does not know if the second strlen will return the same value as the first one. Calling a virtual (overridden) event may lead to unpredictable behavior. MISRA. The comma operator should not be used. V617. The 'swap' function may interchange a variable with itself. MISRA. Only the first element is initialized explicitly. When we call a function by itself (e.g. Attempt to release memory that stores the 'Foo' local variable. V3049. V1081. Implicit type conversion from memsize type to 32-bit type. 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). V652. V3529. Bit fields should only be declared with explicitly signed or unsigned integer type. Possible excessive expression or typo. V3132. V660. An early return is a return statement that occurs before the last line of a function. 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. Consider using an explicit type cast to avoid overflow or loss of a fractional part. Consider assigning event to a local variable before invoking it. V3032. Consider inspecting the 'for' operator. Thus, the warning is a very useful one and you should consider yourself lucky that the compiler noticed the bug. I recently fixed something similar in #2898 which is not yet merged. Probably meant 'A[B] < C'. The argument's value is greater than the size of the collection. AUTOSAR. But, do are you sure you want your return statement inside your loop to begin with? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. V672. V773. OWASP. Error on missing return statement under GCC. Potential XEE vulnerability. This value is already assigned to the 'b' variable. Generic Doubly-Linked-Lists C implementation. V2527. It is possible that ',' comma is missing at the end of the string. Both operands of the '??' V3017. OWASP. V6019. NullReferenceException is possible. V768. This condition was already verified in previous line. Executing this query may lead to an error. I did return true and false but its still giving me this error [deleted] 2 yr. ago More posts you may like V2606. 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. V5612. Possible error in program's logic. V670. Quoting from gcc warning options page: -Wno-unused-result. V516. 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. V587. V5002. V3067. 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. V5621. V3089. V632. Potentially unsafe double-checked locking. The variable 'X' is being used for this loop and for the outer loop. The 'cin.eof()' condition is insufficient to break from the loop. V119. V575. The resulting value may be inaccurate. V3043. V125. Size of every element in X array is not equal to divisor. Consider implementing event accessors explicitly or use 'sealed' keyword. Possibly, it was intended to be escaped. V1043. V2005. V101. Example of safe code: printf("%s", str); V619. V602. V6061. V701. Consider replacing the use of 'std::optional::value()' with either the '*' or '->' operator. MISRA. V5623. int sometimes ( int x) { if (x > 0) { return 2*x; } } The 'then' statement is equivalent to the 'else' statement. 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. V551. V6063. The initial value of the index in the nested loop equals 'i'. V3186. V542. Usage of a suspicious mutex wrapper. Value of a variable is checked after it is used. Identical expression to the left and to the right of compound assignment. Consider replacing methods: 'insert' -> 'emplace', 'push_*' -> 'emplace_*'. MISRA. Destructor of the object will be invoked a second time after leaving the object's scope. V2516. Result of this expression will be implicitly cast to 'Type'. AUTOSAR. How to Make a Black glass pass light through it? Check your control flow logic and make sure you assign a value before every statement that causes a return. V6047. Possible NullReferenceException. A memory/resource leak is possible. AUTOSAR. V3144. Consider refactoring the 'Foo' function. V695. V2018. A non-serializable class should not be serialized. V693. Then the return statement is executed, returning the value of 5 back to the caller. compareTo()-like methods can return not only the values -1, 0 and 1, but any values. V3004. WPF: readonly field of 'DependencyProperty' type is not initialized. Connect and share knowledge within a single location that is structured and easy to search. Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_u64 on Intel CPUs. Probably the '+=' should be used here. V743. Part of conditional expression is always true/false. Potential logical error. V2543. Consider making it implement 'IDisposable' interface. V6102. V3095. The value of uninitialized variable should not be used. V758. V1064. The .exe and .i files are not supported. V558. A terminal null is present inside a string. It is possible that an incorrect variable is compared with null after type conversion using 'dynamic_cast'. Terminal null is present inside a string. The 'A' field should probably be returned/assigned instead. Potential logical error is present. Replace iterator++ with ++iterator. This means that the second 'if' statement is senseless. The object was created but it is not being used. V2003. The passed line may contain format specification. Therefore, printHi is given a void return type. V1016. :' operator, regardless of its conditional expression, always returns one and the same value. V5624. The second condition is always false. Probably the '-=' should be used here. Only values returned from fgetpos() can be used as arguments to fsetpos(). It is suspicious that variable is initialized through itself. V3548. V1028. Octal and hexadecimal escape sequences should be terminated. Features from should not be used. Cyclomatic complexity: NN. V6031. Connect and share knowledge within a single location that is structured and easy to search. V6096. It is advised to pass arguments to std::unary_function/std::binary_function template as references. OWASP. Argument of abs() function is minimal negative value. V303. The 'delete' operator is applied to non-pointer. Variable is used after it is moved. If expression is omitted, the return value of the function is undefined. V106. Check lines: N1, N2. The main function calls two functions: report_square and report_ratio. Three potential reasons for issue the warning (elevated to an error) in spite of this come to mind: Nonetheless, this is easy to work around. V664. Examine the substrings "abc" and "abcd". MISRA. V2588. The resulting value could be inaccurate. V2010. Consider inspecting the expression. The original exception object was swallowed. V110. V748. The second condition is always false. V3044. V1045. V2574. V051. Use memsize-type here. V506. V004. Using 'std::move' function's with const object disables move semantics. MISRA. V3113. Understanding the probability of measurement w.r.t. The return value of non-void function should be used. Consider creating a pointer/reference to avoid using the same expression repeatedly. Consider inspecting conditional expression of the loop. Length should be probably multiplied by sizeof(wchar_t). This leads to undefined behavior. V3057. V1023. Calling the 'SingleOrDefault' method may lead to 'InvalidOperationException'. V3158. jump-statement: Consider inspecting usage of 'Y' counter. V1018. Check lines: N1, N2. Unable to start the analysis on this file. Throwing from exception constructor may lead to unexpected behavior. While, on the other hand, if we try to use/call some function to complete the throw, it is facing the well known error/warning of: no return statement in function returning non-void. V739. V6055. String literal contains potential interpolated expression. The 'memset/memcpy' function is used to nullify/copy fields of 'Foo' class. Suspicious division. Consider synchronizing the field on all usages. V6045. Make sure the expression is correct. nlohmann/json.hpp:20877:5: warning: non-void function does not return a value in all control paths [-Wreturn-type]. V3539. V3072. Same value is present on both sides of the operator. V651. Non-void function must return value. V731. Do not use old versions of SSL/TLS protocols as it may cause security issues. The signature of method 'X' does not conform to serialization requirements. The opposite operator must also be defined. OWASP. 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? MISRA. The 'alloca' function is used inside the loop. An overflow of the 32-bit variable is possible inside a long cycle which utilizes a memsize-type loop counter. Consider wrapping the throw operator in a try..catch block. V503. New variable with default value is created instead of 'std::unique_lock' that locks on the mutex. V6104. Suspicious sequence of assignments: A = B; B = A;. MISRA. V515. MISRA. Length of function body or class declaration is more than 2000 lines. It is probably unused, uninitialized, or already locked. V782. V790. The 'Foo(Foo)' class member is initialized with itself. Possible open redirect vulnerability. A function with a non-void return type must return an answer no matter what its parameters are. MISRA. Consider inspecting the 'for' operator. Expression can be simplified: check similar operands. Serialization order of fields should be preserved during deserialization. What is this brick with a round back and a stud on the side used for? MISRA. Since the function doesnt return a value, this is fine. Stack of original exception could be lost. V6032. V827. [Serializable] attribute is missing. Consider assigning event to a local variable before invoking it. Function '' doesn't return a value on all code paths. Floating-point values should not be tested for equality or inequality. Already have an account? V650. V783. Macro name overrides a keyword/reserved name. Consider inspecting the expression. V6095. OWASP. Function execution could be deferred. This expression can be simplified. MISRA. Parameter is not utilized inside method's body. MISRA. V3039. Check lines: N1, N2. Excessive check can be simplified. V736. A 'break' statement is probably missing in a 'switch' statement.

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