From bcfcafd2adfa2cabd1c823ef026aaaa79a7fb73c Mon Sep 17 00:00:00 2001
From: falkTX <falktx@falktx.com>
Date: Fri, 8 Dec 2023 12:44:48 +0100
Subject: [PATCH] Backport serd double backslash encoding fix

Signed-off-by: falkTX <falktx@falktx.com>
---
 source/modules/lilv/serd-0.24.0/src/reader.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/source/modules/lilv/serd-0.24.0/src/reader.c b/source/modules/lilv/serd-0.24.0/src/reader.c
index fad845a04..6adef5d50 100644
--- a/source/modules/lilv/serd-0.24.0/src/reader.c
+++ b/source/modules/lilv/serd-0.24.0/src/reader.c
@@ -554,9 +554,19 @@ read_STRING_LITERAL_LONG(SerdReader* reader, SerdNodeFlags* flags, uint8_t q)
 					eat_byte_safe(reader, q3);
 					return ref;
 				} else {
-					*flags |= SERD_HAS_QUOTE;
-					push_byte(reader, ref, c);
-					read_character(reader, ref, flags, q2);
+					if (q2 == '\\') {
+						push_byte(reader, ref, c);
+						if (!read_ECHAR(reader, ref, flags) &&
+							!read_UCHAR(reader, ref, &code)) {
+							r_err(reader, SERD_ERR_BAD_SYNTAX,
+								"invalid escape `\\%c'\n", peek_byte(reader));
+							return pop_node(reader, ref);
+						}
+					} else {
+						*flags |= SERD_HAS_QUOTE;
+						push_byte(reader, ref, c);
+						read_character(reader, ref, flags, q2);
+					}
 				}
 			} else {
 				read_character(reader, ref, flags, eat_byte_safe(reader, c));