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Its possible to get logically impossible results using $not in 2.5.5-pre
2.5.5-pre:
> db.thurs6.find({_id: {$lt: 0}})
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{ "_id" : -314159265359 }
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{ "_id" : -3.14159265859 }
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> db.thurs6.find({_id: {$not: {$gte: 0}}}).count()
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134
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> db.runCommand({buildinfo: 1})
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{
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"version" : "2.5.5-pre-",
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"gitVersion" : "4e62d347f090ce1afd91dc59b3db2fab8f930bc0",
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"OpenSSLVersion" : "",
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"sysInfo" : "Darwin Andrew-Emil-MacBook-Pro.local 12.4.0 Darwin Kernel Version 12.4.0: Wed May 1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64 x86_64 BOOST_LIB_VERSION=1_49",
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"loaderFlags" : "-fPIC -pthread -Wl,-bind_at_load -mmacosx-version-min=10.6",
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"compilerFlags" : "-Wnon-virtual-dtor -Woverloaded-virtual -fPIC -fno-strict-aliasing -ggdb -pthread -Wall -Wsign-compare -Wno-unknown-pragmas -Winvalid-pch -Werror -pipe -O3 -Wno-unused-function -Wno-deprecated-declarations -mmacosx-version-min=10.6",
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"allocator" : "tcmalloc",
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"versionArray" : [
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2,
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5,
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5,
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-100
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],
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"javascriptEngine" : "V8",
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"bits" : 64,
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"debug" : false,
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"maxBsonObjectSize" : 16777216,
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"ok" : 1
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}
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Complete output of results from above attached to ticket.
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