github move

Nikita Leontiev — Sat, 06 Jun 2026 11:13:48 -0000

https://cppcheck.sourceforge.io/devinfo still has "danmar":

git clone https://github.com/danmar/cppcheck.git

knownConditionTrueFalse false positive

CHR — Fri, 05 Jun 2026 12:08:56 -0000

Thanks for reporting, ticket is here: https://trac.cppcheck.net/ticket/14819

returnDanglingLifetime and danglingLifetime false positives

CHR — Fri, 05 Jun 2026 11:14:18 -0000

Thanks for reporting, ticket is here: https://trac.cppcheck.net/ticket/14818

returnDanglingLifetime and danglingLifetime false positives

Nikita Leontiev — Fri, 05 Jun 2026 10:12:16 -0000

cppcheck 2.21.0 generates returnDanglingLifetime and danglingLifetime for the following code:

#include <string>

std::string to_string(const char* str)
{
    return str;
}

std::string get()
{
    std::string local;
    return to_string(local.c_str());
}

void get(std::string & str)
{
    std::string local;
    str = to_string(local.c_str());
}

test\main.cpp:11:18: error: Returning object that points to local variable 'local' that will be invalid when returning. [returnDanglingLifetime]
 return to_string(local.c_str());
                 ^
test\main.cpp:11:30: note: Pointer to container is created here.
 return to_string(local.c_str());
                             ^
test\main.cpp:11:30: note: Passed to 'to_string'.
 return to_string(local.c_str());
                             ^
test\main.cpp:10:14: note: Variable created here.
 std::string local;
             ^
test\main.cpp:11:18: note: Returning object that points to local variable 'local' that will be invalid when returning.
 return to_string(local.c_str());
                 ^
test\main.cpp:17:2: error: Non-local variable 'str' will use object that points to local variable 'local'. [danglingLifetime]
 str = to_string(local.c_str());
 ^
test\main.cpp:17:29: note: Pointer to container is created here.
 str = to_string(local.c_str());
                            ^
test\main.cpp:17:29: note: Passed to 'to_string'.
 str = to_string(local.c_str());
                            ^
test\main.cpp:16:14: note: Variable created here.
 std::string local;
             ^
test\main.cpp:17:2: note: Non-local variable 'str' will use object that points to local variable 'local'.
 str = to_string(local.c_str());
 ^

knownConditionTrueFalse false positive

Nikita Leontiev — Fri, 05 Jun 2026 08:32:11 -0000

cppcheck 2.21.0 generates knownConditionTrueFalse for the following code:

class A
{
public:
    template<typename T>
    static bool get(T*)
    {
        return false;
    }
    template<>
    static bool get<int>(int*)
    {
        return true;
    }
};

class B
{
public:
    template<typename T>
    static bool get(T* ptr)
    {
        return A::get(ptr);
    }
};

cppcheck.exe -q --enable=all .
test\main.cpp:22:16: style: Return value 'A::get(ptr)' is always false [knownConditionTrueFalse]
  return A::get(ptr);
               ^
test\main.cpp:22:16: note: Calling function 'get' returns 0
  return A::get(ptr);
               ^
test\main.cpp:22:16: note: Return value 'A::get(ptr)' is always false
  return A::get(ptr);
               ^

Installer readme.txt is outdated

Nikita Leontiev — Fri, 05 Jun 2026 07:09:05 -0000

win_installer/readme.txt is outdated:

 - VS 2015 CRT merge module
       Qt5Core.dll, Qt5PrintSupport.dll, Qt5Widgets.dll, Qt5Gui.dll and platforms/qwindows.dll
  - MS CRT merge module (Microsoft_VC143_CRT_x86.msm or Microsoft_VC143_CRT_x64.msm)

Compilation with Mingw-w64 fails

Nikita Leontiev — Fri, 05 Jun 2026 07:03:27 -0000

Since 2.21.0, compilation with Mingw-w64 fails:

Batch file contents:
    @echo off
    echo "\#define DEF" | x86_64-w64-mingw32-g++ -c -xc - 2> /dev/null && echo "1" || echo "0"
CreateProcess(C:\Users\user\AppData\Local\Temp\make4744-1.bat,C:\Users\user\AppData\Local\Temp\make4744-1.bat,...)
...
Batch file contents:
    @echo off
    echo "\#define DEF" | x86_64-w64-mingw32-g++ -c -xc - 2> /dev/null && echo "1" || echo "0"
CreateProcess(C:\Users\user\AppData\Local\Temp\make4744-1.bat,C:\Users\user\AppData\Local\Temp\make4744-1.bat,...)
...
In file included from lib/valueflow.h:24,
                 from lib/valueflow.cpp:78:
lib/config.h:203:20: error: #if with no expression
  203 | #if HAVE_EXECINFO_H
      |                    ^
mingw32-make: *** [Makefile:489: lib/valueflow.o] Error 1

Caused by commits: 45e0eb0, 6e6f628

Windows Vista/7/8/8.1 support

Nikita Leontiev — Fri, 05 Jun 2026 05:10:13 -0000

I'm talking about C++ runtime libraries that are part of the installer:

concrt140.dll
msvcp140.dll
msvcp140_1.dll
msvcp140_2.dll
msvcp140_atomic_wait.dll
msvcp140_codecvt_ids.dll
vccorlib140.dll
vcruntime140.dll
vcruntime140_1.dll
vcruntime140_threads.dll
GUI is a different topic. Windows 7 support has been dropped in 2.18.0. Installation shouldn't be performed on Windows 7 if "Graphical interface" checkbox is checked.

regression in release 2.21

lamoda — Thu, 04 Jun 2026 18:38:28 -0000

the project cppcheck is simple
only paths set

regression in release 2.21

lamoda — Thu, 04 Jun 2026 18:37:27 -0000

this is mysterious
when i try check only one file, i have no internalAstError'
but if i use project with many files
i got internalAstError' with this one file and another files

Recent posts to Discussion

github move

knownConditionTrueFalse false positive

returnDanglingLifetime and danglingLifetime false positives

returnDanglingLifetime and danglingLifetime false positives

knownConditionTrueFalse false positive

Installer readme.txt is outdated

Compilation with Mingw-w64 fails

Windows Vista/7/8/8.1 support

regression in release 2.21

regression in release 2.21