From 0ad54f863a6e5837693777ae2c64c921e0e4759f Mon Sep 17 00:00:00 2001
From: Jacob Boerema <jgboerema@gmail.com>
Date: Tue, 23 Aug 2022 16:15:59 -0400
Subject: [PATCH] plug-ins: fix #8467 "incorrect value RichTIFFIPTC" when
 loading TIFF ...

created by Adobe Lightroom 5.1

Adobe products are known to write incorrect RichTIFFIPTC tags in TIFF
images.

Since libtiff correctly detects and handles this there is no real need
for end users to be warned. So instead of a warning we will only output
a message to stderr.
---
 plug-ins/file-tiff/file-tiff-io.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/plug-ins/file-tiff/file-tiff-io.c b/plug-ins/file-tiff/file-tiff-io.c
index 190e75b1e5..a883c81382 100644
--- a/plug-ins/file-tiff/file-tiff-io.c
+++ b/plug-ins/file-tiff/file-tiff-io.c
@@ -200,6 +200,28 @@ tiff_io_warning (const gchar *module,
 
       va_end (ap_test);
     }
+  else if (! strcmp (fmt, "Incorrect value for \"%s\"; tag ignored"))
+    {
+      va_list ap_test;
+      const char *stag;
+
+      G_VA_COPY (ap_test, ap);
+
+      stag = va_arg (ap_test, const char *);
+
+      if (! strcmp (stag, "RichTIFFIPTC"))
+        {
+          gchar *msg = g_strdup_vprintf (fmt, ap);
+
+          /* This is an error in Adobe products. Just report to stderr. */
+          g_printerr ("[%s] %s\n", module, msg);
+          g_free (msg);
+
+          return;
+        }
+
+      va_end (ap_test);
+    }
 
   /* Workaround for: http://bugzilla.gnome.org/show_bug.cgi?id=131975
    * Ignore the warnings about unregistered private tags (>= 32768).