diff -urN ../exim-4.94.2.orig/src/debug.c ./src/debug.c
--- ../exim-4.94.2.orig/src/debug.c	2021-04-30 15:08:21.000000000 +0300
+++ ./src/debug.c	2022-07-04 17:20:48.474393000 +0300
@@ -8,7 +8,7 @@
 
 #include "exim.h"
 
-static uschar  debug_buffer[2048];
+static uschar  debug_buffer[4096];
 static uschar *debug_ptr = debug_buffer;
 static int     debug_prefix_length = 0;