[GROOVY-4101] minus(List, Collection) considers different objects equal if they have equal hashCode's

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Component/s: groovy-jdk
• Environment: Groovy++ which IMO doesn't matter
• Assignee: Paul King
• Reporter: Peter Gromov
• Created: 12/Mar/10 11:12
• Updated: 20/Jan/14 22:00
• Resolved: 20/Jan/14 22:00

Description

class Foo {
  int hashCode() { 42 }
}

def x = [new Foo()]
def y = [new Foo()]

println (x-y) // prints []
x.removeAll(y)
println x // prints [Foo@2a]

Not sure about released Groovy versions. NumberAwareComparator seems to be responsible