Bug due to missing cast when doing $i[$x] = $z.

Added `math::iota`.

lib/std/core/mem.c3

@@ -633,7 +633,7 @@ module std::core::mem;
 macro TrackingEnv* get_tracking_env()
 {
 	$if env::TRACK_MEMORY:
-		return &&TrackingEnv { $$FILE, $$FUNC, $$LINE };
+		return &&(TrackingEnv){ $$FILE, $$FUNC, $$LINE };
 	$else
 		return null;
 	$endif

lib/std/math/math.c3

@@ -1145,6 +1145,18 @@ macro overflow_mul_helper(x, y) @local
 	return res;
 }
 
+<*
+ @require types::is_vector($Type) || ($Type.kindof == ARRAY &&& types::is_numerical($typefrom($Type.inner)))
+*>
+macro iota($Type)
+{
+	$Type $val = {};
+	$for var $i = 0; $i < $Type.len; $i++:
+		$val[$i] = $i;
+	$endfor
+	return $val;
+}
+
 macro mul_div_helper(val, mul, div) @private
 {
 	var $Type = $typeof(val);

releasenotes.md

@@ -47,6 +47,7 @@
 - `import` can now both be @public and @norecurse.
 - Crash when trying to convert a struct slice to a vector #2039.
 - Crash resolving a method on `Foo[2]` when `Foo` is distinct #2042.
+- Bug due to missing cast when doing `$i[$x] = $z`.
 
 ### Stdlib changes
 - `new_*` functions in general moved to version without `new_` prefix.
@@ -61,6 +62,7 @@
 - Change all hash functions to have a common `hash` function.
 - `@wstring`, `@wstring32`, `@char32` and `@char16` compile time macros added.
 - Updates to `Atomic` to handle distinct types and booleans.
+- Added `math::iota`.
 
 ## 0.6.8 Change list
 

src/compiler/sema_expr.c

@@ -5745,7 +5745,7 @@ static bool sema_expr_analyse_ct_subscript_rhs(SemaContext *context, Decl *ct_va
 	}
 	else
 	{
-		if (!sema_analyse_inferred_expr(context, type_get_indexed_type(ct_var->type), right)) return false;
+		if (!sema_analyse_expr_rhs(context, type_get_indexed_type(ct_var->type), right, false, NULL, false)) return false;
 	}
 	if (!sema_cast_const(right))
 	{