File 0368-Fix-behavior-of-re-split-3-with-trim-option-for-empt.patch of Package erlang

From 1cae114ab31b99c74cda052c61d6b12fa668c17e Mon Sep 17 00:00:00 2001
From: Maria Scott <maria-12648430@hnc-agency.org>
Date: Mon, 30 Sep 2024 13:35:26 +0200
Subject: [PATCH] Fix behavior of re:split/3 with trim option for empty
 subjects

re:split/3 with the trim option set would return a list with an empty
binary if the pattern was not empty. This was inconsistent with both
Perl split and binary:split/3.
---
 lib/stdlib/src/re.erl        | 2 ++
 lib/stdlib/test/re_SUITE.erl | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/lib/stdlib/src/re.erl b/lib/stdlib/src/re.erl
index 8351619b49..31103b3931 100644
--- a/lib/stdlib/src/re.erl
+++ b/lib/stdlib/src/re.erl
@@ -1081,6 +1081,8 @@ split(Subject,RE,Options) ->
     case compile_split(RE,NewOpt) of
 	{error,_Err} ->
 	    throw(badre);
+	{_PreCompiled, _NumSub, _RunOpt} when FlatSubject =:= <<>> ->
+	    [];
 	{PreCompiled, NumSub, RunOpt} ->
 	    %% OK, lets run
 	    case re:run(FlatSubject,PreCompiled,RunOpt ++ [global]) of
diff --git a/lib/stdlib/test/re_SUITE.erl b/lib/stdlib/test/re_SUITE.erl
index 9a7b5b470e..39d76a5993 100644
--- a/lib/stdlib/test/re_SUITE.erl
+++ b/lib/stdlib/test/re_SUITE.erl
@@ -476,6 +476,10 @@ split_autogen(Config) when is_list(Config) ->
 
 %% Test special options to split.
 split_options(Config) when is_list(Config) ->
+    ok = splittest("", "", [trim], []),
+    ok = splittest("", " ", [trim], []),
+    ok = splittest("", "()", [group, trim], []),
+    ok = splittest("", "( )", [group, trim], []),
     ok = splittest("a b c ","( )",[group,trim],[[<<"a">>,<<" ">>],[<<"b">>,<<" ">>],[<<"c">>,<<" ">>]]),
     ok = splittest("a b c ","( )",[group,{parts,0}],[[<<"a">>,<<" ">>],[<<"b">>,<<" ">>],[<<"c">>,<<" ">>]]),
     ok = splittest("a b c ","( )",[{parts,infinity},group],[[<<"a">>,<<" ">>],[<<"b">>,<<" ">>],[<<"c">>,<<" ">>],[<<>>]]),
-- 
2.43.0