boost_any test failing

[K-ballo]

boost_any test is failing on all tested platforms but MSVC.

Output:

.../build/tests/unit/util/boost_any.cpp(220): comparing address in swapped against original failed in function 'void any_tests::test_swap()': '0x7fc42cc31638' != '0x7fc42cc31628'

[hkaiser]

This looks like some object slicing problem (see the addresses).

[K-ballo]

GCC has a non-conforming COW std::string implementation, with a pointer to the shared representation as the only member. Thus, the small object optimization surprisingly applies for it, resulting in different addresses after swap.

[hkaiser]

Excellent catch!