[Bug libstdc++/60594] std::function of a type with a declared (but not defined) return type fails to compile

[kariya_mitsuru at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60594

Mitsuru Kariya <kariya_mitsuru at hotmail dot com> changed:

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                 CC|                            |kariya_mitsuru at hotmail dot 
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--- Comment #5 from Mitsuru Kariya <kariya_mitsuru at hotmail dot com> ---
FYI, the BUG2 above is compiled successfully by gcc 4.7.3.

cf. http://melpon.org/wandbox/permlink/UZdP4fovs2ATM2iZ


Additionally, the sample code below cannot be compiled by gcc HEAD.

#include <functional>

struct S {
    std::function<S()> f;
};

int main()
{
    S l{ []{ return S{nullptr}; } };
}

cf. http://melpon.org/wandbox/permlink/HAZ7i5JE94KSQhM7


It is also compiled successfully by gcc 4.7.3.
And I think that struct S is not incomplete type (at least, at the point where
it is used).