UDPSocket#recvfrom throws NullPointerException.
-----------------------------------------------
Key: JRUBY-4678
URL: http://jira.codehaus.org/browse/JRUBY-4678
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.4
Environment: Windows XP
P4 2.4 Ghz
JRuby 1.4.0
Reporter: nao16t
UDPSocket#recvfrom throws NullPointerException.
This was found during investigating JRUBY-4627.
C:\>jirb
irb(main):001:0> require 'socket'
=> true
irb(main):002:0> s = UDPSocket.new
=> #<UDPSocket:0x1f0cf51>
irb(main):003:0> s.send('hello', 0, '127.0.0.1', 162)
=> 5
irb(main):004:0> s.recvfrom(6)
RubyUDPSocket.java:171:in `recvfrom': java.lang.NullPointerException
from org/jruby/ext/socket/RubyUDPSocket$i_method_0_0$RUBYINVOKER$recvfro
m.gen:-1:in `call'
from JavaMethod.java:623:in `call'
from DynamicMethod.java:176:in `call'
from CachingCallSite.java:310:in `cacheAndCall'
from CachingCallSite.java:149:in `call'
from CallOneArgNode.java:57:in `interpret'
from NewlineNode.java:104:in `interpret'
from RootNode.java:129:in `interpret'
from ASTInterpreter.java:98:in `evalWithBinding'
from RubyKernel.java:966:in `eval'
from org/jruby/RubyKernel$s_method_0_3$RUBYFRAMEDINVOKER$eval.gen:-1:in
`call'
from DynamicMethod.java:150:in `call'
from CachingCallSite.java:67:in `call'
from FCallManyArgsNode.java:60:in `interpret'
from NewlineNode.java:104:in `interpret'
from InterpretedMethod.java:112:in `call'
from InterpretedMethod.java:124:in `call'
from DefaultMethod.java:144:in `call'
from CachingCallSite.java:67:in `call'
from CallManyArgsNode.java:59:in `interpret'
from FCallOneArgNode.java:36:in `interpret'
from NewlineNode.java:104:in `interpret'
from BlockNode.java:71:in `interpret'
from InterpretedMethod.java:210:in `call'
from DefaultMethod.java:185:in `call'
from CachingCallSite.java:187:in `call'
from CallTwoArgNode.java:59:in `interpret'
from NewlineNode.java:104:in `interpret'
from BlockNode.java:71:in `interpret'
from RescueNode.java:225:in `executeBody'
from RescueNode.java:147:in `interpretWithJavaExceptions'
from RescueNode.java:110:in `interpret'
from BeginNode.java:83:in `interpret'
from NewlineNode.java:104:in `interpret'
from BlockNode.java:71:in `interpret'
from InterpretedBlock.java:317:in `evalBlockBody'
from InterpretedBlock.java:251:in `yield'
from InterpretedBlock.java:185:in `yieldSpecific'
from Block.java:99:in `yieldSpecific'
from ZYieldNode.java:25:in `interpret'
from NewlineNode.java:104:in `interpret'
from EnsureNode.java:96:in `interpret'
from BeginNode.java:83:in `interpret'
from NewlineNode.java:104:in `interpret'
from BlockNode.java:71:in `interpret'
from InterpretedMethod.java:192:in `call'
from DefaultMethod.java:177:in `call'
from CachingCallSite.java:156:in `callBlock'
from CachingCallSite.java:173:in `callIter'
from FCallOneArgBlockNode.java:34:in `interpret'
from NewlineNode.java:104:in `interpret'
from InterpretedBlock.java:317:in `evalBlockBody'
from InterpretedBlock.java:216:in `yieldSpecific'
from Block.java:117:in `yieldSpecific'
from YieldTwoNode.java:31:in `interpret'
from NewlineNode.java:104:in `interpret'
from IfNode.java:117:in `interpret'
from NewlineNode.java:104:in `interpret'
from BlockNode.java:71:in `interpret'
from RescueNode.java:225:in `executeBody'
from RescueNode.java:147:in `interpretWithJavaExceptions'
from RescueNode.java:110:in `interpret'
from BeginNode.java:83:in `interpret'
from NewlineNode.java:104:in `interpret'
from InterpretedBlock.java:317:in `evalBlockBody'
from InterpretedBlock.java:268:in `yield'
from Block.java:194:in `yield'
from RubyKernel.java:1182:in `loop_1_9'
from org/jruby/RubyKernel$s_method_0_0$RUBYFRAMEDINVOKER$loop_1_9.gen:-1
:in `call'
from CachingCallSite.java:300:in `cacheAndCall'
from CachingCallSite.java:118:in `callBlock'
from CachingCallSite.java:133:in `callIter'
from FCallNoArgBlockNode.java:32:in `interpret'
from NewlineNode.java:104:in `interpret'
from InterpretedBlock.java:317:in `evalBlockBody'
from InterpretedBlock.java:268:in `yield'
from Block.java:194:in `yield'
from RubyKernel.java:1014:in `rbCatch'
from org/jruby/RubyKernel$s_method_1_0$RUBYFRAMEDINVOKER$rbCatch.gen:-1:
in `call'
from CachingCallSite.java:320:in `cacheAndCall'
from CachingCallSite.java:158:in `callBlock'
from CachingCallSite.java:173:in `callIter'
from FCallOneArgBlockNode.java:34:in `interpret'
from NewlineNode.java:104:in `interpret'
from BlockNode.java:71:in `interpret'
from InterpretedMethod.java:155:in `call'
from DefaultMethod.java:161:in `call'
from CachingCallSite.java:300:in `cacheAndCall'
from CachingCallSite.java:118:in `callBlock'
from CachingCallSite.java:123:in `call'
from CallNoArgBlockNode.java:64:in `interpret'
from NewlineNode.java:104:in `interpret'
from BlockNode.java:71:in `interpret'
from InterpretedMethod.java:136:in `call'
from DefaultMethod.java:153:in `call'
from CachingCallSite.java:290:in `cacheAndCall'
from CachingCallSite.java:109:in `call'
from CallNoArgNode.java:61:in `interpret'
from NewlineNode.java:104:in `interpret'
from InterpretedBlock.java:317:in `evalBlockBody'
from InterpretedBlock.java:268:in `yield'
from Block.java:194:in `yield'
from RubyKernel.java:1014:in `rbCatch'
from org/jruby/RubyKernel$s_method_1_0$RUBYFRAMEDINVOKER$rbCatch.gen:-1:
in `call'
from CachingCallSite.java:320:in `cacheAndCall'
from CachingCallSite.java:158:in `callBlock'
from CachingCallSite.java:173:in `callIter'
from FCallOneArgBlockNode.java:34:in `interpret'
from NewlineNode.java:104:in `interpret'
from BlockNode.java:71:in `interpret'
from InterpretedMethod.java:173:in `call'
from DefaultMethod.java:169:in `call'
from CachingCallSite.java:310:in `cacheAndCall'
from CachingCallSite.java:149:in `call'
from jirb:19:in `__file__'
from jirb:-1:in `load'
from Ruby.java:628:in `runScript'
from Ruby.java:550:in `runNormally'
from Ruby.java:396:in `runFromMain'
from Main.java:272:in `run'
from Main.java:117:in `run'
from Main.java:97:in `main'
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