diff -up qtwebengine-everywhere-src-5.15.5/src/3rdparty/chromium/third_party/libxml/src/encoding.c.TRUE qtwebengine-everywhere-src-5.15.5/src/3rdparty/chromium/third_party/libxml/src/encoding.c

--- qtwebengine-everywhere-src-5.15.5/src/3rdparty/chromium/third_party/libxml/src/encoding.c.TRUE	2021-05-28 07:05:45.000000000 -0500

+++ qtwebengine-everywhere-src-5.15.5/src/3rdparty/chromium/third_party/libxml/src/encoding.c	2021-06-24 09:44:41.592468805 -0500

@@ -2004,7 +2004,7 @@ xmlEncOutputChunk(xmlCharEncodingHandler

 #ifdef LIBXML_ICU_ENABLED

     else if (handler->uconv_out != NULL) {

         ret = xmlUconvWrapper(handler->uconv_out, 0, out, outlen, in, inlen,

-                              TRUE);

+                              1);

     }

 #endif /* LIBXML_ICU_ENABLED */

     else {