Negative float values are not serialized correctly

[nside]

Erlang code:
-module(store).
-export([test/1]).
test(SomeFloat) ->
 io:fwrite("the float: ~p~n", [SomeFloat]).

python code (variant of):
from twisted.internet import reactor
from twotp import OneShotPortMapperFactory, readCookie, buildNodeName

def gotConnection(inst): #this will work
    return inst.factory.callRemote(inst, "store", "test", (40.0,)
        ).addCallback(gotResult)

def gotConnection(inst): #this will not work
    return inst.factory.callRemote(inst, "store", "test", (-40.0,)
        ).addCallback(gotResult)

def gotResult(resp):
    print "Got response", resp
    reactor.stop()

def eb(error):
    print "Got error", error
    reactor.stop()

cookie = readCookie()
nodeName = buildNodeName('nodename')
epmd = OneShotPortMapperFactory(nodeName, cookie)
epmd.connectToNode("foo").addCallback(gotConnection).addErrback(eb)
reactor.run()

erlang error:
=ERROR REPORT==== 16-Nov-2008::17:36:51 ===
Got invalid data on distribution channel, offending packet is: <<112,131,104,4,97,6,103,100,0,19,108,111,97,100,101,114,64,110,115,105,100,101,45,117,98,117,110,116,117,0,0,0,0,0,0,0,0,0,100,0,0,100,0,3,114,101,120,131,104,2,103,100,0,19,108,111,97,100,101,114,64,110,115,105,100,101,45,117,98,117,110,116,117,0,0,0,0,0,0,0,0,0,104,5,100,0,4,99,97,108,108,100,0,5,115,116,111,114,101,100,0,4,116,101,115,116,108,0,0,0,1,104,1,99,45,52,46,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,101,43,48,49,0,0,0,0,0,106,100,0,4,117,115,101,114>>

[nside (denis-2ni)]

I fixed the bug using py_interface float serialization code. Change packer.py to this:
    def pack_float(self, term):
        """
        Pack a float.
        """
        floatStr = "%.20e" % term
        nullPadStr = "\0" * (31 - len(floatStr))
        return self.packChar(self.MAGIC_FLOAT) + floatStr + nullPadStr

[Thomas Herve (therve)]

Thanks a lot for the report! This is fixed in r25 of trunk.