Re: [Boost-users] [boost-users][lambda] crash in std::for_each

The reason is that std::pairs can be converted to each other. If the type doesn't match exactly: 1) It will be implicitly converted to the correct type. 2) Then you get a reference to first. 3) Then the temporary created in step 1 is destroyed 4) Then you stream first (which has just been destroyed)

Thank you, now I see.