cppcheck 2.11: false positive CastIntegerToAddressAtReturn with C++20 templated lambda

[Sylvain Joubert]

Updgrading to cppcheck 2.11 I know get CastIntegerToAddressAtReturn warnings on the following test code reduced from my codebase:

int* nested_template_lambda_return()
{
  auto explicitTemplate = []<typename T>()
  {
    return true;
  };

  auto noTemplate = []()
  {
    return true;
  };

  return nullptr;
}

$ cppcheck test.cpp --enable=portability
Checking test.cpp ...
test.cpp:5:5: portability: Returning an integer in a function with pointer return type is not portable. [CastIntegerToAddressAtReturn]
    return true;
    ^

This only happens with explicit template specification on lambdas. cppcheck 2.10 was fine with that code so far.

[CHR]

Thanks for reporting, please see https://trac.cppcheck.net/ticket/11275