[MacRuby-devel] Experiences with m17N using PostgreSQL with macruby

[Eloy Duran]

In principle MRI is always right, so unless there's a comment or spec that explains why we deviate it's a bug.

Eloy

On 24 aug. 2011, at 18:19, Steve Clarke wrote:

> I want to use PostgreSQL with macruby.  
> 
> At first I couldn't make this work.  I eventually had some success and learned quite a lot on the way.  I'm not sure whether I found a bug in macruby but it certainly behaves differently from ruby 1.9.2-p290 installed from macports. The latter worked with postgres with no problems.
> 
> My first try was with macruby 0.10 stable.  I couldn't get the pg gem (pg-0.11.0) to compile and eventually gave up.  There were lots of obscure errors which I regret I've not recorded.
> 
> I then moved onto macruby 0.11 which I compiled from source that I checked out today.  pg-0.11.0 now compiled but when I tried to use postgres from my macruby test I aborted with a failed dynamic link to ENCODING_GET_INLINED.  I soon realised this was another name for ENCODING_GET and I added the definition to macruby's encoding.h.
> 
> I could now get as far as connecting to postgres and retrieving a result set.  However, as son as I tried to examine any of the values in the result set I aborted:
> 
> Assertion failed: (idx >= 0 && idx < ENCODINGS_COUNT), function rb_enc_associate_index, file encoding.c, line 590.
> Abort trap: 6
> 
> I eventually found that pg was passing an idx of -1.  I modified the the pg code to prevent this happening and it now works fine, as far as I've gone.
> 
> It seems to me that pg should not pass an index of -1.  ruby 1.9.2-p290 however seems to accept it.  So who's right ?
> 
> Hope this is of interest to someone.
> 
> Steve
> 
> 
> 
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