[Boost-users] [test] Bug in macros when used with valarray?

13 Apr 2007

      I have a bug in my program that looks as though it might be in the 
macros in test.

The following line gives me a segmentation fault:

    BOOST_CHECK_SMALL(var[a][b].first, accuracy);

The variable "var" is of type boost::shared_array<std::pair<double, 
std::valarray<double> > >, for which memory has been allocated as 
follows (with variable names disguised):

    const unsigned int num_elements1 = /* some value */;
    const unsigned int num_elements2 = /* some other value */;
    const unsigned int num_elements3 = /* another value */;
    boost::shared_array<boost::shared_array<std::pair<double, 
std::valarray<double> > > > var_array(
        new boost::shared_array<std::pair<double, std::valarray<double>
...
...
[num_elements1]);
for (unsigned int a = 0; a != num_elements1; ++a)
    {
        var[a].reset(new std::pair<double, std::valarray<double>
...
[num_elements2]);
for (b = FirstSolution; b != num_elements2; ++b)
        {
            var[a][b].second.resize(num_elements3);
        }
    }

The variable "accuracy" is of type double.

The variable is then passed to a test case:

    test_suite -> add(BOOST_TEST_CASE(boost::bind(my_test, var)));

with this header:

    void 
my_test(boost::shared_array<boost::shared_array<std::pair<double, 
std::valarray<double> > > >& var)

Within this test, "var" is passed to another function (by reference) and 
its contents are set.

Outputting the contents shows they have been set OK (using the same 
array indices, note), but the segmentation fault occurs when the 
BOOST_CHECK_SMALL macro is used.

I am using version 1.33.1 of Boost for gcc 3.2.3. I am linking against 
-lboost_unit_test_framework-gcc-d-1_33_1 and -lm

I'm sure I have used this before without any problems in Linux. The 
program works perfectly well in Windows using MSVC and Boost version 1.33.1.

Are there any other link flags I should be using? Is there something 
else I have missed?

Of course, it is entirely possible that I have an array-out-of-bounds 
error in my code or something like that, but my diagnostics aren't 
picking anything like this up, and the Windows version does not report 
any errors with security checks enabled, and, as I say, outputting the 
values to std::cout does not cause a segmentation fault.

Is it possible that the BOOST_CHECK_* macros don't work with 
std::valarray in Boost 1.33.1 for gcc 3.2.3?

Thanks.

[Boost-users] [test] Bug in macros when used with valarray?

Paul Giaccone