From 9dae389cee166ff4061828be74720a632811d9a8 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Tue, 9 May 2023 13:28:06 +0200
Subject: parser: Fix "huge input lookup" error with push parser

Fix parsing of larger documents without XML_PARSE_HUGE.

Should fix #538.
---
 parserInternals.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/parserInternals.c b/parserInternals.c
index 6612ea74..ddc874ca 100644
--- a/parserInternals.c
+++ b/parserInternals.c
@@ -639,9 +639,10 @@ xmlParserShrink(xmlParserCtxtPtr ctxt) {
     xmlParserInputBufferPtr buf = in->buf;
     size_t used;
 
-    /* Don't shrink memory buffers. */
+    /* Don't shrink pull parser memory buffers. */
     if ((buf == NULL) ||
-        ((buf->encoder == NULL) && (buf->readcallback == NULL)))
+        ((ctxt->progressive == 0) &&
+         (buf->encoder == NULL) && (buf->readcallback == NULL)))
         return;
 
     used = in->cur - in->base;
-- 
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