The argument's value is greater than the size of the collection. Explicit type conversion from memsize to double type or vice versa. AUTOSAR. Incorrect shifting expression. Potential Java SE API compatibility issue. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Function body contains the 'X' label that is not used by any 'goto' statements. Overflow check is incorrect. Error on missing return statement under GCC. V834. V1017. Calling method or accessing property of potentially disposed object may result in exception. It is suspicious that a char or string literal is added to a pointer. The 'A' class containing IDisposable members does not itself implement IDisposable. V3123. V2534. The 'then' statement is equivalent to the 'else' statement. Decreased performance. Call of function 'foo' with variable number of arguments. V6044. Function is not declared. Conversions between pointers to objects and integer types should not be performed. Unchecked tainted data is used in expression. Consider using 'std::move' instead. It is possible that type name was omitted: throw MyException(a, b);. Consider inspecting the expression. Suspicious invocation of Thread.run(). Consider inspecting the expression. V750. Possible server-side request forgery. The functions from time.h/ctime should not be used. Consider inspecting the NNth argument of the 'Foo' function. V776. Consider replacing the use of 'std::optional::value()' with either the '*' or '->' operator. V3161. Suspicious sequence of types castings: memsize -> 32-bit integer -> memsize. V1094. V1083. V2600. Suspicious subexpression in a sequence of similar comparisons. Potentially tainted data is used to create OS command. Priority of '+' operation is higher than priority of '<<' operation. It is possible that an error is present. The 'malloc' function is used to allocate memory for an array of objects that are classes containing constructors/destructors. Execution of report_ratio "falls off the bottom" and returns no value to the caller. Here's the correct version: The 'main' and 'wmain' functions are the exceptions. The function argument corresponding to a parameter declared to have an array type should have an appropriate number of elements. C compiling Error: non-void function does not return a value in all control paths - CS50. Probably meant: *ptr != zero. The 'continue' operator will terminate 'do { } while (FALSE)' loop because the condition is always false. V6098. V3173. Probably the '!='/'-='/'+=' should be used here. V6019. Unsafe invocation of event, NullReferenceException is possible. OWASP. Use of a pointer to FILE when the associated stream has already been closed. The function with the 'atof/atoi/atol/atoll' name should not be used. rev2023.4.21.43403. Classes that define 'equals' method must also define 'hashCode' method. 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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. AUTOSAR. The expression contains a suspicious mix of integer and real types. V688. Implicit type conversion from enum type to integer type. Incorrect format. 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. Conversions between pointers to objects and integer types should not be performed. Possible exception when deserializing type. MISRA. Use of constant NN. The body of a loop\conditional statement should be enclosed in braces. OWASP. The 'Foo' function receives the pointer and its size as arguments. V739. V571. The 'Thread' object is created but is not started. 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 can result in an overflow. It is possible that a typo is present inside the string literal. V6103. V2004. Excessive type casting: string -> char * -> string. V3112. MISRA. Expression can be simplified: check similar operands. the first printHi() in the above example), were calling a function for its behavior, not its return value. V680. Modification of variable is unsequenced relative to another operation on the same variable. Potentially tainted data is used in a search filter. V643. This file is marked with copyleft license, which requires you to open the derived source code. It is possible that a typo is present inside the expression. The object is already of the same type. Literal suffixes should not contain lowercase characters. V3066. V010. The 'throw' keyword could be missing. Constant expression in switch statement. A pattern was detected: A || (A && ). Potentially tainted data is used to create an object using deserialization. MISRA. Locking operations must be performed on the same thread. Stack of original exception could be lost. V816. V2548. MISRA. Temporary anonymous object is used. Cast should not remove 'volatile' qualifier from the type that is pointed to by a pointer or a reference. A function should not call itself either directly or indirectly. Member operator[] of object 'foo' is declared with 32-bit type argument, but is called with memsize type argument. V590. The name of 'X' field/property in a nested type is ambiguous. V3519. The 'bar2.h' header will be excluded from compilation. V1026. Structures with members of real type are compared byte-wise. The function was annotated as dangerous. Check for typos and consider using the 'default:' operator instead. V543. Asking for help, clarification, or responding to other answers. Function returns pointer/reference to temporary local object. NullReferenceException is possible. The expression is excessive or contains a logical error. V828. An 'else' branch may apply to the previous 'if' statement. V3153. Recursive function call during the static/thread_local variable initialization might occur. Cast should not convert a pointer to a function to any other pointer type, including a pointer to function type. Consider using the 'size()' function. V593. Value of variable is not modified. Has the Melford Hall manuscript poem "Whoso terms love a fire" been attributed to any poetDonne, Roe, or other? MISRA. V585. Exceptions raised inside noexcept functions must be wrapped in a try..catch block. Function exited without releasing the pointer/handle. The value of an expression is a potentially destroyed Unity object or null. V1016. V1070. The '? Line splice results in a character sequence that matches the syntax of a universal-character-name. V6094. The function is deprecated in the Win64 system. V3504. V726. The parentheses around the return expression in square are evaluated as part of the expression, and aren't required by the return statement. The expression is checked for compatibility with the type 'A', but is casted to the 'B' type. Identical expression to the left and to the right of compound assignment. Use of jump statements in 'finally' block can lead to the loss of unhandled exceptions. Such a pointer will become invalid. An exception should be caught by reference rather than by value. V662. V592. Insecure XML parser is used to process potentially tainted data. The expression was enclosed by parentheses twice: ((expression)). V798. V516. A resource is returned from try-with-resources statement. Object should not be assigned or copied to an overlapping object. It's better to use '= default;' syntax instead of empty body. MISRA. Consider inspecting the loop expression. The macro with the 'setjmp' name and the function with the 'longjmp' name should not be used. An exception handling block does not contain any code. MISRA. Priority of the '&&' operator is higher than that of the '||' operator. A void function will automatically return to the caller at the end of the function. Incorrect index type: 'foo[not a memsize-type]'. Argument of incorrect type is passed to the 'Enum.HasFlag' method. Suspicious explicit type casting. A switch-label should only appear at the top level of the compound statement forming the body of a 'switch' statement. Already have an account? There is a probability of logical error presence. V542. It is likely that a wrong variable is being incremented inside the 'for' operator. V3113. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The .exe and .i files are not supported. Possible XPath injection. V1037. V660. An early return is a return statement that occurs before the last line of a function. Do not define an unnamed namespace in a header file. OWASP. The compiler isn't going to go to very much trouble to detect this situation, because functions like throw_blah which are guaranteed to never return are rare, and because except in the simplest of situations, there's no way for it to reliably do so. In a main function, the return statement and expression are optional. 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. no return statement in function returning non-void while using C++, How a top-ranked engineering school reimagined CS curriculum (Ep. V3010. It is possible that an incorrect variable is compared with null after type conversion using 'dynamic_cast'. A few are mentioned below: . Check the following code block after the 'if' statement. There is no point to declare constant reference to a number. The 'goto' statement shouldn't jump to a label declared earlier. V1056. It is dangerous to create a local variable within a loop with a same name as a variable controlling this loop. V1011. A private Ctor(SerializationInfo, StreamingContext) constructor in unsealed type will not be accessible when deserializing derived types. V727. V3028. Consider assigning the seed to a value not known at compile-time. All integer constants of unsigned type should have 'U' suffix. The 'static' storage class specifier should be used in all declarations of object and functions that have internal linkage. Don't use terminating functions in library code. V6018. An excessive expression. Due to the way the compiler is constructed, warnings are generally reported early, and suppressing this warning based on later analysis would be difficult. V566. Character escape is used in multicharacter literal. 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? It is possible that this 'else' branch must apply to the previous 'if' statement. V2573. The function expects the file to be opened in one mode, but it was opened in different mode. V555. V5002. String literal should not be assigned to object unless it has type of pointer to const-qualified char. V2526. There should be no occurrence of undefined or critical unspecified behaviour. V124. The result of the right shift operation will always be 0. The 'swap' function may interchange a variable with itself. AUTOSAR. Can the game be left in an invalid state if all state-based actions are replaced? Why does flowing off the end of a non-void function without returning a value not produce a compiler error? The memory areas must not overlap. V2546. (Experienced programmers will generally use a solitary. compareTo()-like methods can return not only the values -1, 0 and 1, but any values. Absolute value of the left operand is less than the right operand. V501. V2589. Using 'await' in a critical section may lead to a lock being released on a different thread. V6076. V6010. Does this function have explicit return values on all control paths? Expression of the 'A =- B' kind is used. Email? The 'foo' word is suspicious. V2503. The 'delete A, B' expression only destroys the 'A' object. Floating-point values should not be tested for equality or inequality. Constructor parameter is not used. OWASP. V810. V3070. V6096. Absolute values of both operands are equal. Possible overflow. Perhaps, this is a typo and 'X' variable should be used instead of 'Y'. Flexible array members should not be declared. V118. OWASP. V001. Unhandled exceptions in destructor lead to termination of runtime. Incorrect diagnostics are possible. V006. V713. V3138. This may lead to undefined behavior. V3046. V665. Assigning potentially negative or large value as timeout of HTTP session can lead to excessive session expiration time. V1075. V764. V6097. What risks are you taking when "signing in with Google"? Consider inspecting the loop expression. The '&=' or '|=' operator is redundant because the right operand is always true/false. The function with the 'atof/atoi/atol/atoll' name should not be used. Two similar code fragments. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? Correction-related comments will be deleted after processing to help reduce clutter. An identifier with array type passed as a function argument should not decay to a pointer. A memory/resource leak is possible. Unsigned value is compared to the NN number. I agree. Perhaps the correct expression is strlen(expr) + 1. V2008. Sorting keys priority will be reversed relative to the order of 'OrderBy' method calls. Connect and share knowledge within a single location that is structured and easy to search. Update: You need to make your function return a vector in every condition as suggested in comments. 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? V806. V2615. This may break the program's logic. Then the return statement is executed, returning the value of 5 back to the caller. The opposite operator must also be defined. The 'throw' operator does not have any arguments and is not located within the 'catch' block. Program contains an unused label and function call: 'CC:AA()'. AUTOSAR. Implicit type conversion of return value from memsize type to 32-bit type. Calling overrideable class member from constructor is dangerous. V1047. V1024. V2516. V669. V3526. V5302. V2591. V731. Label is present inside switch(). Are you missing a 'Return' statement? malloc() function accepts a dangerous expression in the capacity of an argument. It is possible that a line was commented out improperly, thus altering the program's operation logic. Consider replacing the expression 'AA' with 'BB'. V3167. The body of a loop\conditional statement should be enclosed in braces. V3048. Suspicious sequence of types castings: pointer -> memsize -> 32-bit integer. V1091. V1003. Functions should not have unused parameters. OWASP. V616. Suspicious explicit conversion from 'float *' type to 'double *' type. It is suspicious that the argument of sizeof() operator is the expression. V608. Passing these values into the method will result in an exception. V804. Casts between a pointer to an incomplete type and any other type shouldn't be performed. Possibility of decreased performance. Perhaps, 'ThenBy' should be used instead. Do not concatenate string literals with different prefixes. Bit shifting of the 32-bit value with a subsequent expansion to the 64-bit type. Consider inspecting usage of 'Y' counter. The expression contains a suspicious mix of integer and real types. 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. If expression is omitted, the return value of the function is undefined. V3019. The analysis results could be incomplete. Consider inspecting the expression. MISRA. MISRA. Generic Doubly-Linked-Lists C implementation. The variable from the loop exit condition does not change its value between iterations. 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. Use memsize type instead. Exception classes should be publicly accessible. Cast should not convert pointer to function to any other pointer type. Suspicious access to element by a constant index inside a loop. MISRA. V561. AUTOSAR. V3184. The 'i' variable should probably be incremented instead of the 'n' variable. Check lines: N1, N2. V1065. Exception is of the 'int' type because NULL is defined as 0. V708. V3545. Consider inspecting it. V700. Possible typo inside the string literal. This can cause concurrency issues. Expression resulting from the macro expansion should be surrounded by parentheses. More info about Internet Explorer and Microsoft Edge, Compile Page, Project Designer (Visual Basic). V3014. The first 'if' statement contains method return. :' operation: implicit type conversion to memsize type. V6084. "Signpost" puzzle from Tatham's collection, QGIS automatic fill of the attribute table by expression, Generating points along line with specifying the origin of point generation in QGIS. Bit fields should only be declared with explicitly signed or unsigned integer type. The total size limit is 20MB. V826. Perhaps this is a mistake. Conversion between pointers of different object types should not be performed. V2571. V3135. V1055. V3534. I can give he a test with 2.0.3-RC1 and lease you perceive The return keyword is used during the end of to function to get the value back. Array is used as pointer to single object. V541. V127. Pointer is used both as an array and as a pointer to single object. Comma operator ',' in array index expression. The standard input/output functions should not be used. There is a probability of logical error presence. V3182. Conditional expression of 'if' statement is incorrect for the HRESULT type value 'Foo'. Possible XSS vulnerability. V2565. Lifetime of the heap-allocated variable is limited to the current function's scope. The variable is incremented in the loop. Consider inspecting the loop expression. MISRA. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Adding EV Charger (100A) in secondary panel (100A) fed off main (200A). What happens to the returned value, if one is specified, depends on the implementation. Dangerous widening type conversion from an array of derived-class objects to a base-class pointer. Was Aristarchus the first to propose heliocentrism? Suspicious comparison found: 'a == b == c'. V6051. V1001. Decreased performance. AUTOSAR. V107. V3537. There are two 'if' statements with identical conditional expressions. V2561. V2581. The object was created but it is not being used. V712. V564. The used constant value is represented by an octal form. Incorrect format. Expression of the 'A =+ B' kind is used. By default, this message is a warning. V2544. Probably meant: 'CC::AA()'. 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. V3530. The return value of non-void function should be used. V3114. The address of an object with local scope should not be passed out of its scope. V2599. V755. The object of non-passive (non-PDS) type cannot be used with the function. To learn more, see our tips on writing great answers. V3118. Such functions are usually marked '[[noreturn]]'. More than N bits are required to store the value, but the expression evaluates to the T type which can only hold K bits. The compiler may issue a warning diagnostic message about unreachable code if it finds any statements placed after the return statement. Value of the essential character type should be used appropriately in the addition/subtraction operations. It is recommended to use the 'make_unique/make_shared' function to create smart pointers. Destructor of 'Foo' class is not declared as virtual. Check lines: N1, N2. It will be closed before the method exits. MISRA. V3129. MISRA. V3509. V1096. A global object variable is declared in the header. Hi, been using 2.0.1 so far over the proposed workaround (void function instead of non-void function). check your Spam/Junk folder and click the "Not Spam" button for our message. The signature of method 'X' does not conform to serialization requirements. Early returns can be used in value-returning functions too: First, print() is called. V797. Typedef names should be unique across all name spaces. Two opposite conditions were encountered. Why don't we use the 7805 for car phone chargers? Notice that BSTR strings store their length before start of the text. V594. Unreachable code detected. Thanks for helping to make the site better for everyone. OWASP. V5619. This causes unspecified or undefined behavior. Consider inspecting the expression. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. It is more effective to use the prefix form of ++it. V5013. V3098. V560. An example of data being processed may be a unique identifier stored in a cookie. V518. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? Potentially negative value is used as the size of an array. Consider inspecting the expression. Variables are initialized through the call to the same function. V6009. 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. Maximum size of a vector is known at compile time. Pointer to local array 'X' is stored outside the scope of this array. The right operand is greater than or equal to the number of bits in the left operand. MISRA. The expression is excessive or contains a misprint. V1010. Parameter 'A' is always rewritten in method body before being used. The value from the uninitialized optional is used. AUTOSAR. By clicking Sign up for GitHub, you agree to our terms of service and :' operator, regardless of its conditional expression, always returns the same value. Diagnostics from the 64-bit rule set are not entirely accurate without the appropriate 64-bit compiler. Value of a composite expression should not be cast to a different essential type category or a wider essential type. V678. V3549. During the initial analysis, the code nominally contains three code paths. V2593. V831. The best answers are voted up and rise to the top, Not the answer you're looking for? Such a function results in undefined behavior. V3060. Shift by N bits is inconsistent with the size of type. Consider inspecting the expression. The result of '&' operator is '0' because one of the operands is '0'. As we know pipelined function doesn't require Return, because of its working and for best programming practice we write it. V3146. Arrays should not be partially initialized. Calling element access method for potentially empty collection may result in exception. V735. Argument is a non-constant reference. Consider inspecting this expression. Functions of strcmp() kind can return any values, not only -1, 0, or 1. Suspicious subexpression in a sequence of similar comparisons. In this case, the return value of the called function is undefined. jump-statement: The function located to the right of the '|' and '&' operators will be called regardless of the value of the left operand. Non-atomic modification of volatile variable. V3004. We discuss the debate over early returns in lesson 7.10 -- Break and continue. Constant expression evaluation should not result in an unsigned integer wrap-around.
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