Boost C++ Libraries: Ticket #12367: Using an offset_ptr type as value for multi_index_container causes compile error with 1.59+

attachment set

Mon, 01 Aug 2016 19:18:46 GMT

attachment → boosttest.cpp

Example that causes the compile error, slightly modified from the boost multi_index/interprocess interoperability example.

attachment set

Mon, 01 Aug 2016 19:19:14 GMT

attachment → 20160801 boosttest compile error.txt

The compile error caused by the boosttest.cpp example.

Joaquín M López Muñoz — Mon, 08 Aug 2016 16:26:10 GMT

Hi Michael,

Sorry about my late answering, I wasn't monitoring the email inbox these tickets notify to.

As for your problem, I think it is a rather obscure bug having to do with boost::interprocess:offset_ptr convertibility machinery. I'll try to isolate this into something I can go with to Boost.Interprocess's author. In the meantime, please try replacing line 37 of boost/multi_index/detail/raw_ptr.hpp:

  return p==Pointer(0)?0:&*p;

with

  return !p?0:&*p;

Could you please report back if this solves your problem? Thanks for spotting this bug.

Mon, 08 Aug 2016 18:16:17 GMT

Hi Joaquin:

The above change to replace line 37 does indeed fix the compile problem.

Thanks for your help!

Joaquín M López Muñoz — Wed, 10 Aug 2016 15:21:16 GMT

Hi again,

Ion (the author of Boost.Container) has applied the following commit:

https://github.com/boostorg/interprocess/commit/8253c1b0add95ade098ae2d481f52a3bd4be6da5

Would you mind verifying if this (without my patch above) solves the problem so that we can close the ticket? Thank you,

Wed, 10 Aug 2016 17:50:00 GMT

Hello Joaquin:

Ion's fix works perfectly (verified without your above patch). Thanks to both of you for all your help!

status changed; resolution set

Joaquín M López Muñoz — Thu, 11 Aug 2016 08:04:49 GMT

status new → closed
resolution → fixed