From bbef5ed92d8bc0cc5a6d75277f9091b958c26a3f Mon Sep 17 00:00:00 2001
From: Jonathan Bernard <jonathan@jdbernard.com>
Date: Sat, 28 Mar 2026 21:31:58 -0500
Subject: [PATCH] Handle unknown RFC 6868 escapes in vCard 4 params

---
 src/vcard/vcard4.nim | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/vcard/vcard4.nim b/src/vcard/vcard4.nim
index 5c8ce2a..59c2373 100644
--- a/src/vcard/vcard4.nim
+++ b/src/vcard/vcard4.nim
@@ -1293,7 +1293,10 @@ proc readParamValue(p: var VCardParser): string =
         result.add('"')
         discard p.read
       else:
-        p.error("invalid character escape: '^$1'" % [$p.read])
+        result.add('^')
+        if (quoted and QSAFE_CHARS.contains(p.peek)) or
+           (not quoted and SAFE_CHARS.contains(p.peek)):
+          result.add(p.read)
     else: result.add(c)
 
   if quoted and p.read != '"':