Perhaps this is a mistake. MainWindow.cs 351, V3008 The 'matrixResult' variable is assigned values twice successively. Check lines: 269, 279. baseencoder.cpp 279. aitencoder.cpp 275. 
Check lines: 916, 936. According to the standard, if we pass the exception above in the function call stack by means of throw e;, we'll lose the call stack that was before the catch of the exception in the catch block. The 'if (pixels)' check can be removed. Check lines: 369, 367. If it is impossible to allocate the memory, then we have an exception which should be handled on a higher level, and the verification against null can just be deleted. aitdecoder.cpp 634. MainWindow.cs 480, V3008 The 'columnSpan' variable is assigned values twice successively. The cost of making a video game has increased over the years. Check lines: 56, 55. V3072 The 'Email' class containing IDisposable members does not itself implement IDisposable. aitencoder.cpp 221, V668 There is no sense in testing the 'bytes' pointer against null, as the memory was allocated using the 'new' operator. This graphic subsystem is a part of the .NET Framework, starting with version 3.0. As in C#, let's start with various comparisons. CommandLine.cs 55, V3008 The 'strRight' variable is assigned values twice successively. aitencoder.cpp 292. Check lines: 351, 349. The 'if (colors)' check can be removed. For programmers it's a common problem - errors in the comparisons.
Inspect: _inputStringReader. Perhaps this is a mistake. We don't have to go far to find more buggy fragments. We can even say that the majority of if conditions are the null-checks of some fields or variables. IDisposable has always been troublesome. It's not really clear what was meant here, but apparently, it was something different from what we see now. MainWindow.cs 14, V3072 The 'MainWindow' class containing IDisposable members does not itself implement IDisposable. By the way, thanks to our beloved copy-paste, an error was found in two projects: HtmlToXamlDemo and DocumentSerialization. But if the program logic presupposes writing discrete values to the real numbers (double), then these checks aren't a mistake. Game development is becoming increasingly complex, the code base is getting larger as well. There were two practically identical functions in the solution (thanks to copy-paste) with the same error: V3022 Expression 'writer != null' is always true. Sometimes the checks are unnecessary, and sometimes they aren't enough as in the following code: V3057 The 'Substring' function could receive the '-1' value while non-negative value is expected. Check lines: 176, 173. If only we could get rid of meaningless checks for better understanding of the code, which is read more often than it is written Let's take a short break and have a look at one function that I have recently come across. htmllexicalanalyzer.cs 24, V3072 The 'MainWindow' class containing IDisposable members does not itself implement IDisposable. Congratulations! MainWindow.cs 66.
If the new operator was unable to allocate the memory, then according to the C++ standard, an exception std::bad_alloc() is thrown. As a result, we have code that will never be executed, or we'll get an exception NullReferenceException in the string htmlLiElement.LocalName.ToLower(). Actually, even in C++ this variant is erroneous, in C# it will at least look "weird". But even slight deviation in 0.00000000001 will lead to incorrect result in comparisons. Errors when writing if statement conditions.
Consider using a comparison with defined precision: Math.Abs(A - B) < Epsilon. HtmlFromXamlConverter.cs 491. In this solution there were also quite a lot of these warnings: 1. If you But sometimes such checks can be redundant and even contain logical errors: V3022 Expression 'values != null' is always true. Check lines: 141, 115. Email? Why do we ask to use Business "Not Spam" button for our message. Developers around the world use their favorite IDEs every day to create software. This diagnostic shows the places where we access the variable first, and then verify it against null. aitencoder.cpp 157, V668 There is no sense in testing the 'colors' pointer against null, as the memory was allocated using the 'new' operator. continuing the view of our web-pages you accept the terms of using these files. Thus, the verification against null is meaningless, as the obj pointer will never be equal to NULL. Perhaps this is a mistake. V3063 A part of conditional expression is always true: htmlWriter != null. We like to do the verifications against null in the conditions, and thus try to protect the program from emergency events. CommandLine.cs 56. strLeft and strRight - are just local variables of string type. Jul 04 2022, Author: To let people know about PVS-Studio, which is now able to check not only C++ projects, but C# as well, we decided to check the source code of WPF examples, offered by Microsoft.
MainWindow.cs 14, V3072 The 'ThumbViewer' class containing IDisposable members does not itself implement IDisposable. V3061 Parameter 'fileName' is always rewritten in method body before being used. Now, it has almost replaced the outdated WinForms. In my humble opinion, the main disadvantage of WinForms, was the fact that it was doing all the rendering on the CPU. At the same time the variable htmlChildNode, is nothing more than a reference to the variable htmlLiElement. Check lines: 2115, 2101. Your message has been sent. As you can see, in the PVS-Studio window there are warnings issued for both C# and C++ code (click on the image to enlarge). aitencoder.cpp 241, V809 Verifying that a pointer value is not NULL is not required.
The DependencyProperty is one of the most remarkable features of WPF. It's no problem for the analyzer. Inspect: _annStore, _annotationBuffer. Let's look at that very C++ bug that I mentioned in the C# block. V560 A part of conditional expression is always true. Perhaps this is a mistake. This is the body of the function: V3022 Expression 'Savings >= 0' is always true. We will email you at. HtmlLexicalAnalyzer.cs 16, V3072 The 'MainWindow' class containing IDisposable members does not itself implement IDisposable. Of course after refactoring we may have variables that were initialized twice in a row. Programmers often forget, miss, or just don't pay attention to the field with the type, implementing this interface. 1.
V668 There is no sense in testing the 'obj' pointer against null, as the memory was allocated using the 'new' operator. I got the impression that the following code was written by a C++ programmer.
It's getting harder for developers to track b, PVS-Studio evolution: data flow analysis for related variables, Related variables are one of the main problems of static analysis. Errors made during the forming the conditions of the if statement. Perhaps this is a mistake. HtmlToXamlConverter.cs 916.
The exception will be generated in the case of memory allocation error. Perhaps this is a mistake. Of course, the most efficient would be to check the code with PVS-Studio regularly, not just do the analysis of the final version of the program.
V3095 The 'htmlLiElement' object was used before it was verified against null. This option causes big problems when working from XAML markup. Perhaps this is a mistake. I'll write the whole function so you can understand the situation clearer. Email? MainWindow.xaml.cs 66, V3072 The 'HtmlLexicalAnalyzer' class containing IDisposable members does not itself implement IDisposable. Error in initialization and assigning variables. experience. As I have already said, the project contains code from C++ and C# diagnostics. 2. Lack of time and copy-paste sometimes produces very strange constructions: V3005 The '_timerClock' variable is assigned to itself. Of course meaningless checks can be found not only in long functions, but within several strings. PVS-Studio plugin for Visual Studio, without any additional settings from the user's side, performed the analysis and displayed warnings for both C++ and C# projects. Util.cs 287. And some more examples of meaningless primary assignments: There is no point in writing each example, more interesting bugs are waiting ahead. Check lines: 320, 321. aitencoder.cpp 321. Check lines: 140, 138. ReflectionUtils.cs 797, V3052 The original exception object 'e' was swallowed. Checking Orleans with the PVS-Studio analyzer, Orleans is a cross-platform framework for creating scalable cloud applications. But an interesting fact is that the majority of errors aren't in specific constructions, but in simple expressions. FireworkEffect.cs 196. Please attach your files here. Bitwarden is an open-source password management service. The name of the file that should be opened, is lost right before its first use fileName = dialog.FileName. Perhaps this is a mistake. aitencoder.cpp 189, V809 Verifying that a pointer value is not NULL is not required. Inspect: _listControl. The expression is excessive or contains a misprint. Some C# programmers aren't aware that the following two operations over the Nullable type are equivalent: Thatt's why they write the following checks: At the same time, C++ people like to make pointless verifications against null, before freeing the memory that was allocated by the address that it points to. Figure 1.
Static code analyzer PVS-Studio for C, C++ and C#, will allow you to control the code quality, and will do its best to safeguard you from the fatal errors that can get to your users. To keep the whole stack call, and its further continuation, we just need to write one throw word in the catch block and that's it. NetIncome.cs 98. Why should Unity game developers use static analysis? the platforms: Any bugs in your IDE?
The total size limit is 20MB. Inspect: _client. Let's look at another interesting warning.
Yes, a dialog window will be opened and the user file will be chosen, but why do we need a parameter that isn't really used? Check lines: 55, 54. May 11 2022, Date: Also we have found a lot (more than 60) comparisons of real numbers (double) with a precise 0. Stack of original exception could be lost. Check lines: 126, 125. Perhaps this is a mistake. If you haven't received our response, please do the following: check your Spam/Junk folder and click the This software is developed by Microsoft, and PVS-Studio often checks its projects. This is your promo code: Team License Upon Windows Vista release, the company introduced a new subsystem for rendering user interfaces in Windows-based applications - Windows Presentation Foundation (WPF). MainWindow.cs 140, V3008 The 'matrixResult' variable is assigned values twice successively. This may not seem the most horrible typo, but it makes us think, "are we writing to the correct place for the second time?" Date: V519 The 'result' variable is assigned values twice successively. Check lines: 52, 47. There is no check that fontFamily.Length is bigger than 1, thus, subtracting from fontFamily.Length number 2 we can get a value less than 0. aitdecoder.cpp 182, V668 There is no sense in testing the 'pixels' pointer against null, as the memory was allocated using the 'new' operator. Email.cs 15. V3052 The original exception object 'e' was swallowed.
The following code is even more incorrect. It is especially important that this function will do exactly the task that is stated in its name, and the signature of the call. ReflectionUtils.cs 806. Check lines: 480, 478. Well, for example, like this: V3005 The 'clipboardInfo.Text' variable is assigned to itself. Now WPF allows the making of universal interfaces for three platforms at once (PC, XBOXOne, Winphone), and has practically ousted WinForms. Today we are checking one of them and looking at the most interesting errors found. Why do we ask to use Business V3024 An odd precise comparison: leftConst.Value == 1. There were four more similar checks in the Solution: Excessive conditions are common for both programming languages: V571 Recurring check.
V3023 Consider inspecting the 'sizeString.Length == 0 || sizeString.Length != 2' expression. The exception will be generated in the case of a memory allocation error. MainWindow.cs 20, V3072 The 'MainWindow' class containing IDisposable members does not itself implement IDisposable. MultExpression.cs 47, V3008 The 't' variable is assigned values twice successively. V3022 Expression 'fs != null' is always true. Check lines: 418, 422. txtserializerwriter.cs 418.
In the long bodies of if instruction sometimes it's very hard to notice meaningless checks while doing code review. Inspect: _customersTableAdapter, _nwDataSet MainWindow.cs 15, V3072 The 'MainWindow' class containing IDisposable members does not itself implement IDisposable. Let's have a look at them. The following code shows quite an interesting situation of logical comparison, although you wouldn't say so. There is a point of view, that C# is less subject to errors than C++, and in some cases it is really so. Perhaps this is a mistake. Check lines: 66, 65. MainWindow.cs 369, V3008 The 'pointResult' variable is assigned values twice successively. But the main thing is not to make an error in the condition when the exception should be thrown, because it can create an unpleasant impression in the eyes of our user, when the program crashes all of a sudden. Inspect: _inputStringReader. Errors in the initialization and assigning of variables. Will PVS-Studio find errors in such a project?
WPF approached this in a more sensible way, and let DirectX do the rendering of the components. An interesting thing about this solution, is the fact that along with the projects written in C#, there are also several C++ projects. In case it's not desirable to have exceptions in the application, we can use the new operator which doesn't generate exceptions (T *obj = new (std::nothrow) T()), , and thus, the return value can be verified against null. Judging by the text of the error, the comparison with 0 is excessive, it was enough to check if sizeString.Length is not equal to 2. All the lines won't fit in one article. May 13 2022, Date: Sometimes such strings are written successively: V519 The 'result' variable is assigned values twice successively. Perhaps this is a mistake. The exception will be generated in the case of memory allocation error. But this is not always the case, for example, consider the following code fragment. The 'bitmapLock' condition was already verified in line 104. aitdecoder.cpp 106. When the variables are initialized further after several lines of code, we can easily understand, why the person made a mistake. MainWindow.xaml.cs 56, V3008 The 'pathGeometry' variable is assigned values twice successively. There is a probability of logical error presence. Stack of original exception could be lost. The Bitwarden project check.
But we accessed the variable htmlLiElement without the verification against null. But I found it only from the list of the bugs found by PVS-Studio. But the main thing is to avoid confusing the signature to describe them, it is particularly important to remember this when showing the examples, because that's what people judge by, V3045 WPF: the names of the registered property 'RadiusBase', and of the property 'Radius', do not correspond with each other. Actually, in PVS-Studio, there are a number of diagnostics to detect errors in the signature when creating DependencyProperty [3044, 3045, 3046, 3047, 3048, 3049]. We could assume that the author wanted to check that values has more than 0 elements, I personally couldn't think of a situation where Split returns an empty array. Check lines: 56, 54.
In case there are mathematical evaluations (manipulations with the value), there is no guarantee that we will get a specific number: -1, 0, 1.
V3008 The 'arg' variable is assigned values twice successively.