[MacRuby] #1047: Clean up warnings when installing gems

[MacRuby]

#1047: Clean up warnings when installing gems
------------------------------+---------------------------------------------
 Reporter:  sferik@…          |       Owner:  lsansonetti@…        
     Type:  defect            |      Status:  new                  
 Priority:  trivial           |   Milestone:  MacRuby 1.0          
Component:  MacRuby           |    Keywords:                       
------------------------------+---------------------------------------------

Comment(by lsansonetti@…):

 {{{

 Breakpoint 1, rb_warn (fmt=0x105ed979c "ignoring alias") at error.c:156
 156     {
 (gdb) bt
 #0  rb_warn (fmt=0x105ed979c "ignoring alias") at error.c:156
 #1  0x0000000105ecde9d in get_node (parser=0x105ed979c) at rubyext.c:533
 #2  0x0000000105ecdc78 in handle_mapping [inlined] () at /Users/lrz/src
 /macruby-trunk/ext/libyaml/rubyext.c:498
 #3  0x0000000105ecdc78 in get_node (parser=0x105ed979c) at rubyext.c:521
 #4  0x0000000105ecdd28 in handle_sequence [inlined] () at /Users/lrz/src
 /macruby-trunk/ext/libyaml/rubyext.c:483
 #5  0x0000000105ecdd28 in get_node (parser=0x105ed979c) at rubyext.c:525
 #6  0x0000000105ecdc78 in handle_mapping [inlined] () at /Users/lrz/src
 /macruby-trunk/ext/libyaml/rubyext.c:498
 #7  0x0000000105ecdc78 in get_node (parser=0x105ed979c) at rubyext.c:521
 #8  0x0000000105ecc54f in rb_yaml_parser_load (self=4394424220,
 sel=0x402992f60) at rubyext.c:561
 #9  0x000000010013b4c6 in rb_vm_dispatch (_vm=0x100b19cc0,
 cache=0x100a9c7a0, top=17183119520, self=17223462240, klass=0x400319ca0,
 sel=0x7fff8a96d1f8, block=0x0, opt=0 '\0', argc=<value temporarily
 unavailable, due to optimizations>, argv=0x0) at dispatcher.cpp:159
 }}}

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Ticket URL: <http://www.macruby.org/trac/ticket/1047#comment:2>
MacRuby <http://macruby.org/>