Merge branch 'devel' into pr_legacy_asm

changelogs/changelog_1_0_0.md

@@ -22,7 +22,7 @@
 
 - We removed `unicode.Rune16` without any deprecation period as the name
   was wrong (see the [RFC](https://github.com/nim-lang/RFCs/issues/151) for details)
-  and we didn't find any usages of it in the wild. If you still need it, add this
+  and we didn't find any usage of it in the wild. If you still need it, add this
   piece of code to your project:
 ```nim
 type

changelogs/changelog_2_0_0.md

@@ -283,7 +283,7 @@ The definition of `"strictFuncs"` was changed.
 The old definition was roughly: "A store to a ref/ptr deref is forbidden unless it's coming from a `var T` parameter".
 The new definition is: "A store to a ref/ptr deref is forbidden."
 
-This new definition is much easier to understand, the price is some expressitivity. The following code used to be
+This new definition is much easier to understand, the price is some expressiveness. The following code used to be
 accepted:
 
 ```nim

compiler/semtypes.nim

@@ -409,8 +409,12 @@ proc semArrayIndex(c: PContext, n: PNode): PType =
       result = makeRangeWithStaticExpr(c, e.typ.n)
     elif e.kind in {nkIntLit..nkUInt64Lit}:
       if e.intVal < 0:
-        localError(c.config, n.info,
-          "Array length can't be negative, but was " & $e.intVal)
+        if e.kind in {nkIntLit..nkInt64Lit}:
+          localError(c.config, n.info,
+            "Array length can't be negative, but was " & $e.intVal)
+        else:
+          localError(c.config, n.info,
+            "Array length can't exceed its maximum value (9223372036854775807), but was " & $cast[BiggestUInt](e.intVal))
       result = makeRangeType(c, 0, e.intVal-1, n.info, e.typ)
     elif e.kind == nkSym and (e.typ.kind == tyStatic or e.typ.kind == tyTypeDesc):
       if e.typ.kind == tyStatic: