Commit 4f944077 for libheif

commit 4f9440778f9b92815a5850f8ae656bc642445fda
Author: Dirk Farin <dirk.farin@gmail.com>
Date:   Mon May 18 22:31:11 2026 +0200

    add defensive check in init_sample_timing_table() (thanks to @m1-llie for the report)

diff --git a/libheif/sequences/track.cc b/libheif/sequences/track.cc
index b825a90f..a153f3fb 100644
--- a/libheif/sequences/track.cc
+++ b/libheif/sequences/track.cc
@@ -1038,11 +1038,15 @@ Error Track::init_sample_timing_table()
     while (current_chunk < m_chunks.size() &&
            i > m_chunks[current_chunk]->last_sample_number()) {
       current_chunk++;
-      current_sample_in_chunk_idx=0;
+      current_sample_in_chunk_idx = 0;
+    }

-      if (current_chunk > m_chunks.size()) {
-        timing.chunkIdx = 0; // TODO: error
-      }
+    if (current_chunk >= m_chunks.size()) {
+      return {
+        heif_error_Invalid_input,
+        heif_suberror_Unspecified,
+        "Sample not covered by any chunk."
+      };
     }

     timing.chunkIdx = current_chunk;