Infinite loop when using variables with keyword name

[vvdleun]

In a throw-away script, I was using "in" as an absolutely terribly chosen variable name for an InputStream. This seems to cause an infinite loop when compiling the script in at least both 3.2.0-M5 and M6.

Simplest example would be something like:

module crash

function main = |args| {
    let in = "oh noes"
}

I think this is true for all reserved keywords (I tried several others, like "for" and "return")

[jponge]

Thanks, it's likely a parser recovery issue.