0.1 + 0.2 == 0.3 returns false in all the interpreters I have installed locally (Ruby, Python, NodeJS and Haskell), and you can't with a straight face pretend that Haskells type system is not strict enough.

Because I was curious, I tested it out with C# on repl.it and behold, 0.1 + 0.2 == 0.3 returns false in C# as well: https://repl.it/repls/AdoredValidVirtualmachines. Not very surprising of course, since that "error" is a result of the IEEE floating point spec and not of any language.