[Boost-bugs] [Boost C++ Libraries] #5384: `diagnostic_information_what` returns 0 when no `error_info` is added to exception

Subject: [Boost-bugs] [Boost C++ Libraries] #5384: `diagnostic_information_what` returns 0 when no `error_info` is added to exception
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-03-29 09:35:03

#5384: `diagnostic_information_what` returns 0 when no `error_info` is added to
exception
---------------------------------------------------+------------------------
 Reporter:  Pavel Machyniak <machyniak@…>          |       Owner:  emildotchevski
     Type:  Bugs                                   |      Status:  new           
Milestone:  To Be Determined                       |   Component:  exception     
  Version:  Boost 1.46.0                           |    Severity:  Problem       
 Keywords:                                         |  
---------------------------------------------------+------------------------
 Scenario:
  - throwing derived exception from both `boost::exception` and
 `std::exception`
  - catching as `std::exception`
  - logging with `e.what()`, what is overridden and uses
 `boost::diagnostic_information_what`
  - when throwing such exception with `error_info` added, everything is
 fine
  - when throwing such exception without `error_info` added, no string is
 returned from `diagnostic_information_what`, at least I would expect the
 string like `"Dynamic exception type: struct TestException"`

 Observations:
 In `diagnostic_information_what` implementation is correct string
 generated by `exception_detail::diagnostic_information_impl` but is
 trashed and `exception_detail::get_diagnostic_information` returns 0 in
 described case.

 Workaround:
 We are using internal
 `boost::exception_detail::diagnostic_information_impl` instead of
 `boost::diagnostic_information_what`.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5384>
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