File 0502-syntax-tools-Fix-location-info-of-reverted-lists.patch of Package erlang

From 4f2b41386ce5105c576eb727c68923c400a3691c Mon Sep 17 00:00:00 2001
From: Max Nordlund kivra <max.nordlund@kivra.com>
Date: Tue, 13 Jun 2023 17:23:36 +0200
Subject: [PATCH 2/2] syntax tools: Fix location info of reverted lists

The hidden `nil` node that is generated takes it's location from the
last element of the list, instead of the list  node itself, because that
generally represents the start of the list.

Similarly, the `cons` nodes are given the location of each element.

However, care must be taken to preserve the other annotations in `pos`,
which is really an `erl_anno` annotation.
---
 lib/syntax_tools/src/erl_syntax.erl | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/lib/syntax_tools/src/erl_syntax.erl b/lib/syntax_tools/src/erl_syntax.erl
index f3e8a106ea..4797aa229e 100644
--- a/lib/syntax_tools/src/erl_syntax.erl
+++ b/lib/syntax_tools/src/erl_syntax.erl
@@ -2456,17 +2456,23 @@ list(Elements, Tail) when Elements =/= [] ->
 
 revert_list(Node) ->
     Pos = get_pos(Node),
-    P = list_prefix(Node),
-    S = case list_suffix(Node) of
+    Prefix = list_prefix(Node),
+    Suffix = case list_suffix(Node) of
 	    none ->
-		revert_nil(set_pos(nil(), Pos));
-	    S1 ->
-		S1
+            LastPos = get_pos(lists:last(Prefix)),
+            LastLocation = case erl_anno:end_location(LastPos) of
+                undefined -> erl_anno:location(LastPos);
+                Location -> Location
+            end,
+            revert_nil(set_pos(nil(), erl_anno:set_location(LastLocation, Pos)));
+	    Suffix1 ->
+            Suffix1
 	end,
-    lists:foldr(fun (X, A) ->
-			{cons, Pos, X, A}
-		end,
-		S, P).
+    lists:foldr(fun (Head, Tail) ->
+        HeadPos = get_pos(Head),
+        HeadLocation = erl_anno:location(HeadPos),
+        {cons, erl_anno:set_location(HeadLocation, Pos), Head, Tail}
+    end, Suffix, Prefix).
 
 %% =====================================================================
 %% @doc Creates an abstract empty list. The result represents
-- 
2.35.3