Fix issue in List with sanitizers.

lib/std/collections/list.c3

@@ -234,11 +234,11 @@ fn void List.push_front(&self, Type type) @inline
 fn void List.insert_at(&self, usz index, Type type)
 {
 	self.reserve(1);
-	for (usz i = self.size; i > index; i--)
+	self.set_size(self.size + 1);
+	for (isz i = self.size - 1; i > index; i--)
 	{
 		self.entries[i] = self.entries[i - 1];
 	}
-	self.set_size(self.size + 1);
 	self.entries[index] = type;
 }
 
@@ -342,7 +342,8 @@ fn usz List.retain_if(&self, ElementPredicate selection)
 fn usz List.remove_using_test(&self, ElementTest filter, any context)
 {
 	usz old_size = self.size;
-	defer {
+	defer
+	{
 		if (old_size != self.size) self._update_size_change(old_size, self.size);
 	}
 	return list_common::list_remove_using_test(self, filter, false, context);

releasenotes.md

@@ -62,6 +62,7 @@
 - `set_env` would leak memory.
 - Fix issue where aligned bitstructs did not store/load with the given alignment.
 - Fix issue in GrowableBitSet with sanitizers.
+- Fix issue in List with sanitizers.
 
 ### Stdlib changes
 - Added '%h' and '%H' for printing out binary data in hexadecimal using the formatter.