To get a trial key
fill out the form below
Team License (standard version)
Enterprise License (extended version)
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Request our prices
New License
License Renewal
--Select currency--
USD
EUR
GBP
RUB
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Message submitted.

Your message has been sent. We will email you at


If you haven't received our response, please do the following:
check your Spam/Junk folder and click the "Not Spam" button for our message.
This way, you won't miss messages from our team in the future.

>
>
Examples of errors detected by the V655…

Examples of errors detected by the V655 diagnostic

Apr 05 2021

V655. The strings were concatenated but are not utilized. Consider inspecting the expression.


Scilab

V655 The strings were concatenated but are not utilized. Consider inspecting the 'szCurLevel + "."' expression. sci_displaytree.cpp 80


int sci_displaytree(char *fname, unsigned long fname_len)
{
  ....
  string szCurLevel = "";
  ....
  //Add node level
  if (szCurLevel != "")
  {
    szCurLevel + ".";
  }
  ....
}

K Desktop Environment

V655 The strings were concatenated but are not utilized. Consider inspecting the expression. entrydetailsdialog.cpp 225


void EntryDetails::updateButtons()
{
  ....
  foreach (....) {
    QString text = info.name;
    if (!info.distributionType.trimmed().isEmpty()) {
      text + " (" + info.distributionType.trimmed() + ")"; // <=
    }
    QAction* installAction =
      installMenu->addAction(KIcon("dialog-ok"), text);
    installAction->setData(info.id);
  }
  ....
}

Similar errors can be found in some other places:

  • V655 The strings were concatenated but are not utilized. Consider inspecting the expression. itemsgridviewdelegate.cpp 365
  • V655 The strings were concatenated but are not utilized. Consider inspecting the expression. itemsviewdelegate.cpp 159

FreeCAD

V655 The strings were concatenated but are not utilized. Consider inspecting the expression. propertyitem.cpp 1013


void
PropertyVectorDistanceItem::setValue(const QVariant& variant)
{
  if (!variant.canConvert<Base::Vector3d>())
      return;
  const Base::Vector3d& value = variant.value<Base::Vector3d>();

  Base::Quantity q = Base::Quantity(value.x, Base::Unit::Length);
  QString unit = QString::fromLatin1("('%1 %2'").arg(....;
  q = Base::Quantity(value.y, Base::Unit::Length);
  unit + QString::fromLatin1("'%1 %2'").arg(....;   // <=

  setPropertyValue(unit);
}

OpenToonz

V655 The strings were concatenated, but are not utilized. Consider inspecting the 'alias + "]"' expression. plasticdeformerfx.cpp 150


string PlasticDeformerFx::getAlias(....) const
{
  std::string alias(getFxType());
  alias += "[";
  ....
  if (sd)
    alias += ", "+toString(sd, meshColumnObj->paramsTime(frame));

  alias + "]"; // <=

  return alias;
}

LLVM/Clang

V655 [CWE-480] The strings were concatenated but are not utilized. Consider inspecting the 'Result + Name.str()' expression. Symbol.cpp 32


LLVM_DUMP_METHOD void Symbol::dump(raw_ostream &OS) const {
  std::string Result;
  if (isUndefined())
    Result += "(undef) ";
  if (isWeakDefined())
    Result += "(weak-def) ";
  if (isWeakReferenced())
    Result += "(weak-ref) ";
  if (isThreadLocalValue())
    Result += "(tlv) ";
  switch (Kind) {
  case SymbolKind::GlobalSymbol:
    Result + Name.str();                        // <=
    break;
  case SymbolKind::ObjectiveCClass:
    Result + "(ObjC Class) " + Name.str();      // <=
    break;
  case SymbolKind::ObjectiveCClassEHType:
    Result + "(ObjC Class EH) " + Name.str();   // <=
    break;
  case SymbolKind::ObjectiveCInstanceVariable:
    Result + "(ObjC IVar) " + Name.str();       // <=
    break;
  }
  OS << Result;
}

Similar errors can be found in some other places:

  • V655 [CWE-480] The strings were concatenated but are not utilized. Consider inspecting the 'Result + "(ObjC Class) " + Name.str()' expression. Symbol.cpp 35
  • V655 [CWE-480] The strings were concatenated but are not utilized. Consider inspecting the 'Result + "(ObjC Class EH) " + Name.str()' expression. Symbol.cpp 38
  • V655 [CWE-480] The strings were concatenated but are not utilized. Consider inspecting the 'Result + "(ObjC IVar) " + Name.str()' expression. Symbol.cpp 41

Popular related articles
Appreciate Static Code Analysis!

Date: Oct 16 2017

Author: Andrey Karpov

I am really astonished by the capabilities of static code analysis even though I am one of the developers of PVS-Studio analyzer myself. The tool surprised me the other day as it turned out to be sma…
Free PVS-Studio for those who develops open source projects

Date: Dec 22 2018

Author: Andrey Karpov

On the New 2019 year's eve, a PVS-Studio team decided to make a nice gift for all contributors of open-source projects hosted on GitHub, GitLab or Bitbucket. They are given free usage of PVS-Studio s…
Technologies used in the PVS-Studio code analyzer for finding bugs and potential vulnerabilities

Date: Nov 21 2018

Author: Andrey Karpov

A brief description of technologies used in the PVS-Studio tool, which let us effectively detect a large number of error patterns and potential vulnerabilities. The article describes the implementati…
The Evil within the Comparison Functions

Date: May 19 2017

Author: Andrey Karpov

Perhaps, readers remember my article titled "Last line effect". It describes a pattern I've once noticed: in most cases programmers make an error in the last line of similar text blocks. Now I want t…
Characteristics of PVS-Studio Analyzer by the Example of EFL Core Libraries, 10-15% of False Positives

Date: Jul 31 2017

Author: Andrey Karpov

After I wrote quite a big article about the analysis of the Tizen OS code, I received a large number of questions concerning the percentage of false positives and the density of errors (how many erro…
PVS-Studio ROI

Date: Jan 30 2019

Author: Andrey Karpov

Occasionally, we're asked a question, what monetary value the company will receive from using PVS-Studio. We decided to draw up a response in the form of an article and provide tables, which will sho…
The way static analyzers fight against false positives, and why they do it

Date: Mar 20 2017

Author: Andrey Karpov

In my previous article I wrote that I don't like the approach of evaluating the efficiency of static analyzers with the help of synthetic tests. In that article, I give the example of a code fragment…
The Last Line Effect

Date: May 31 2014

Author: Andrey Karpov

I have studied many errors caused by the use of the Copy-Paste method, and can assure you that programmers most often tend to make mistakes in the last fragment of a homogeneous code block. I have ne…
How PVS-Studio Proved to Be More Attentive Than Three and a Half Programmers

Date: Oct 22 2018

Author: Andrey Karpov

Just like other static analyzers, PVS-Studio often produces false positives. What you are about to read is a short story where I'll tell you how PVS-Studio proved, just one more time, to be more atte…
The Ultimate Question of Programming, Refactoring, and Everything

Date: Apr 14 2016

Author: Andrey Karpov

Yes, you've guessed correctly - the answer is "42". In this article you will find 42 recommendations about coding in C++ that can help a programmer avoid a lot of errors, save time and effort. The au…

Comments (0)

Next comments

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
This website uses cookies and other technology to provide you a more personalized experience. By continuing the view of our web-pages you accept the terms of using these files. If you don't want your personal data to be processed, please, leave this site.
Learn More →
Accept