Improve testing and error handling around operating before processing

2 files changed, 12 insertions, 1 deletions

diff --git a/qpdf/qtest/qpdf/test73.out b/qpdf/qtest/qpdf/test73.out
index 435189fd..b23c4c00 100644
--- a/qpdf/qtest/qpdf/test73.out
+++ b/qpdf/qtest/qpdf/test73.out
@@ -1,2 +1,3 @@
-WARNING: closed input source: object 1/0: error reading object: QPDF operation attempted after closing input source
+getRoot: attempted to dereference an uninitialized QPDFObjectHandle
+WARNING: closed input source: object 1/0: error reading object: QPDF operation attempted on a QPDF object with no input source. QPDF operations are invalid before processFile (or another process method) or after closeInputSource
 closed input source: unable to find /Root dictionary
diff --git a/qpdf/test_driver.cc b/qpdf/test_driver.cc
index 1d995bb7..7d5b2ece 100644
--- a/qpdf/test_driver.cc
+++ b/qpdf/test_driver.cc
@@ -2715,6 +2715,16 @@ void runtest(int n, char const* filename1, char const* arg2)
     }
     else if (n == 73)
     {
+        try
+        {
+            QPDF pdf2;
+            pdf2.getRoot();
+        }
+        catch (std::exception& e)
+        {
+            std::cerr << "getRoot: " << e.what() << std::endl;
+        }
+
         pdf.closeInputSource();
         pdf.getRoot().getKey("/Pages").unparseResolved();
     }