Invalidate cached page count value when inserting and deleting pages.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/pdf/pdf-page.c b/source/pdf/pdf-page.c
index fd6f71bc..fe77830f 100644
--- a/source/pdf/pdf-page.c
+++ b/source/pdf/pdf-page.c
@@ -573,6 +573,8 @@ pdf_delete_page(pdf_document *doc, int at)
 		pdf_dict_puts_drop(parent, "Count", pdf_new_int(doc, count - 1));
 		parent = pdf_dict_gets(parent, "Parent");
 	}
+
+	doc->page_count = 0; /* invalidate cached value */
 }
 
 void
@@ -641,6 +643,8 @@ pdf_insert_page(pdf_document *doc, pdf_page *page, int at)
 	{
 		fz_rethrow(ctx);
 	}
+
+	doc->page_count = 0; /* invalidate cached value */
 }
 
 void