Reproduce the error with:

var a = newSeq[bool](1000) if any(a): echo "ok?"

Get compiler crash:

Error: internal error: getTypeDescAux(tyFromExpr) No stack traceback available To create a stacktrace, rerun compilation with ./koch temp c <file> 

I think i am using system.any which is a "meta type" and not sequtils.any. Even though I am using sequtils.any wrong. I expect to get an error some thing like: "system.any can't be created from an seq". Or even some thing less fancy like "invalid type" at line 2.