Fix function tesseract::write_set (issue #3965)

It crashed when running mftraining with fs.size() == 0. Signed-off-by: Stefan Weil <[email protected]>
tesseract-ocr · Dec 11, 2022 · 1d8626c · 1d8626c
1 parent 29f373c
commit 1d8626c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/ccstruct/fontinfo.cpp b/src/ccstruct/fontinfo.cpp
@@ -221,7 +221,8 @@ bool write_spacing_info(FILE *f, const FontInfo &fi) {
 
 bool write_set(FILE *f, const FontSet &fs) {
   int size = fs.size();
-  return tesseract::Serialize(f, &size) && tesseract::Serialize(f, &fs[0], size);
+  return tesseract::Serialize(f, &size) &&
+         (size > 0 ? tesseract::Serialize(f, &fs[0], size) : true);
 }
 
 } // namespace tesseract.