I have a strange problem while trying to communicate from macruby to running drb process. Only one request is passing, on second I'm getting error. I tested same simple code in ruby 1.9.1 and Ruby 1.8.6 and there all works ok. Server can be run with any version of Ruby, and everything works except when client is running with macruby. Here is the sample code for client and server to reproduce error. Sample server, returns new value for each call on increment: ------------------------ require 'drb' class Incrementer def initialize @value = 0 end def increment @value += 1 end end service = DRb.start_service("druby://localhost:4242", Incrementer.new) print "service started on port 4242\n" DRb.thread.join ------------------------ Sample client, displays server value: ------------------------ require 'drb' DRb.start_service server = DRbObject.new_with_uri('druby://localhost:4242') p server.increment #this line, works as expected p server.increment #this line raises error ------------------------ And the error is: ------------------------ /Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/ drb/drb.rb:961: [BUG] destination 0x7fff5fbfbe48 isn't in the auto zone MacRuby version 0.4 (ruby 1.9.1) [universal-darwin9.0, x86_64] -- stack frame ------------ 0000 (0xc08000060): 00000004 0001 (0xc08000068): 00000000 0002 (0xc08000070): 00000004 0003 (0xc08000078): 00000000 0004 (0xc08000080): 8000c7de0 0005 (0xc08000088): 00000004 0006 (0xc08000090): 00000000 0007 (0xc08000098): 00000004 0008 (0xc080000a0): 100397ad0 0009 (0xc080000a8): 00000004 0010 (0xc080000b0): 00000000 0011 (0xc080000b8): 8000c7de0 0012 (0xc080000c0): 100397ad0 0013 (0xc080000c8): 8000d58a0 0014 (0xc080000d0): 00000004 0015 (0xc080000d8): 00000004 0016 (0xc080000e0): 00000004 0017 (0xc080000e8): 00000004 0018 (0xc080000f0): 00000004 0019 (0xc080000f8): 00000004 0020 (0xc08000100): 00000000 0021 (0xc08000108): 1003a7830 0022 (0xc08000110): 800316c80 0023 (0xc08000118): 00000004 0024 (0xc08000120): 00000004 0025 (0xc08000128): 00000004 0026 (0xc08000130): c080ffe58 0027 (0xc08000138): 00000004 0028 (0xc08000140): c08000100 (= 20) 0029 (0xc08000148): 1003ae6d0 0030 (0xc08000150): 800316c80 0031 (0xc08000158): 00000004 0032 (0xc08000160): 00000004 0033 (0xc08000168): 00000004 0034 (0xc08000170): 00000004 0035 (0xc08000178): c080ffd78 0036 (0xc08000180): 800388240 0037 (0xc08000188): 00000004 0038 (0xc08000190): c080ffd08 0039 (0xc08000198): 8000d5280 0040 (0xc080001a0): 00000004 0041 (0xc080001a8): c08000178 (= 35) 0042 (0xc080001b0): 800314c60 0043 (0xc080001b8): 00000004 0044 (0xc080001c0): c080ffc28 0045 (0xc080001c8): 8000e03c0 0046 (0xc080001d0): 00000004 0047 (0xc080001d8): c080001a8 (= 41) 0048 (0xc080001e0): 8000e03c0 0049 (0xc080001e8): 00000004 0050 (0xc080001f0): 00000000 0051 (0xc080001f8): 800311f60 0052 (0xc08000200): 00000004 0053 (0xc08000208): 00000000 0054 (0xc08000210): 10035afe0 0055 (0xc08000218): 8000d52c0 0056 (0xc08000220): 00000004 0057 (0xc08000228): 00000004 0058 (0xc08000230): 00000001 0059 (0xc08000238): 00000004 0060 (0xc08000240): 00000000 <- lfp <- dfp -- control frame ---------- c:0016 p:---- s:0061 b:0061 l:000060 d:000060 CFUNC :select c:0015 p:0030 s:0054 b:0054 l:000053 d:000053 METHOD /Library/ Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/drb/ drb.rb:961 c:0014 p:0017 s:0051 b:0051 l:000050 d:000050 METHOD /Library/ Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/drb/ drb.rb:1212 c:0013 p:0036 s:0048 b:0048 l:000035 d:000047 BLOCK /Library/ Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/drb/ drb.rb:1168 c:0012 p:---- s:0047 b:0047 l:000046 d:000046 FINISH :method_added: c:0011 p:---- s:0045 b:0045 l:000044 d:000044 CFUNC :each c:0010 p:0013 s:0042 b:0042 l:000035 d:000041 BLOCK /Library/ Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/drb/ drb.rb:1166 c:0009 p:0011 s:0039 b:0039 l:000038 d:000038 METHOD prelude.rb:8 c:0008 p:0011 s:0036 b:0036 l:000035 d:000035 METHOD /Library/ Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/drb/ drb.rb:1163 c:0007 p:0015 s:0029 b:0029 l:000020 d:000028 BLOCK /Library/ Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/drb/ drb.rb:1092 c:0006 p:0026 s:0027 b:0027 l:000026 d:000026 METHOD /Library/ Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/drb/ drb.rb:1110 c:0005 p:0090 s:0021 b:0021 l:000020 d:000020 METHOD /Library/ Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/drb/ drb.rb:1091 c:0004 p:---- s:0011 b:0011 l:000010 d:000010 FINISH :p c:0003 p:0066 s:0009 b:0007 l:000006 d:000006 TOP test_client.rb:6 c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH :inherited: c:0001 p:0000 s:0002 b:0002 l:000001 d:000001 TOP --------------------------- DBG> : "/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ ruby/1.9.1/drb/drb.rb:961:in `select'" DBG> : "/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ ruby/1.9.1/drb/drb.rb:961:in `alive?'" DBG> : "/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ ruby/1.9.1/drb/drb.rb:1212:in `alive?'" DBG> : "/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ ruby/1.9.1/drb/drb.rb:1168:in `block (2 levels) in open'" DBG> : "/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ ruby/1.9.1/drb/drb.rb:1166:in `each'" DBG> : "/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ ruby/1.9.1/drb/drb.rb:1166:in `block in open'" DBG> : "prelude.rb:8:in `synchronize'" DBG> : "/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ ruby/1.9.1/drb/drb.rb:1163:in `open'" DBG> : "/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ ruby/1.9.1/drb/drb.rb:1092:in `block in method_missing'" DBG> : "/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ ruby/1.9.1/drb/drb.rb:1110:in `with_friend'" DBG> : "/Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ ruby/1.9.1/drb/drb.rb:1091:in `method_missing'" DBG> : "test_client.rb:6:in `<main>'" -- backtrace of native function call (Use addr2line) -- 0x10010f2c1 0x100029334 0x100029418 0x10003be45 0x10011043c 0x1000469fc 0x10010ada7 0x10010074f 0x1001056e2 0x10010d4a2 0x1000071c7 0x10010ada7 0x10010074f 0x1001056e2 0x100106c0a 0x10010719a 0x100109d2e 0x10010ac93 0x10010074f 0x1001056e2 0x10010596c 0x10002cd32 0x1000300f7 0x100000f1f 0x100000ea4 0x2 ------------------------------------------------------- Abort trap Thanks in advance for any help on this. Igor.