Re: [Boost-bugs] [Boost C++ Libraries] #8598: asio::streambuf: commit(n) appears to add n+1

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #8598: asio::streambuf: commit(n) appears to add n+1
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-05-22 21:38:42

#8598: asio::streambuf: commit(n) appears to add n+1
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  Reporter:  Mike Cowperthwaite <michael.cowperthwaite@…>                  |       Owner:  chris_kohlhoff
      Type:  Bugs                                                          |      Status:  new           
 Milestone:  To Be Determined                                              |   Component:  asio          
   Version:  Boost 1.53.0                                                  |    Severity:  Problem       
Resolution:                                                                |    Keywords:                
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Comment (by Mike Cowperthwaite <michael.cowperthwaite@…>):

 I tried using three-character test strings and '3' instead of '1' as
 arguments to `sputn()`, `commit()`, and `consume()`.  The erroneous cases
 resulted in three-byte errors instead of one-.  This made me think that
 the `commit()` calls were superfluous.

 So I tried commenting out the `commit()` calls, and with that
 modification, the test passes.

 It appears that the `sputn()` ("writes characters ... into the controlled
 output sequence") somehow performs the equivalent of the `commit()`
 ("Appends n characters from the start of the output sequence to the input
 sequence"). How this happens is entirely unclear.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8598#comment:1>
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