enforce the condition of a 'when' condition to be of type bool; refs #…

…8603
nim-lang · Aug 23, 2018 · 361a2d8 · 361a2d8
1 parent 1546826
commit 361a2d8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/compiler/semexprs.nim b/compiler/semexprs.nim
@@ -2085,7 +2085,7 @@ proc semWhen(c: PContext, n: PNode, semCheck = true): PNode =
           typ = commonType(typ, it.sons[1].typ)
         result = n # when nimvm is not elimited until codegen
       else:
-        var e = semConstExpr(c, it.sons[0])
+        let e = forceBool(c, semConstExpr(c, it.sons[0]))
         if e.kind != nkIntLit:
           # can happen for cascading errors, assume false
           # InternalError(n.info, "semWhen")