Handle pages with no /Contents from getPageContents()

The spec allows /Contents to be omitted for pages that are blank, but
QPDFObjectHandle::getPageContents() was throwing an exception in this
case.

3 files changed, 14 insertions, 1 deletions

diff --git a/qpdf/qtest/qpdf.test b/qpdf/qtest/qpdf.test
index 8e697844..b2bf06a7 100644
--- a/qpdf/qtest/qpdf.test
+++ b/qpdf/qtest/qpdf.test
@@ -199,7 +199,7 @@ $td->runtest("remove page we don't have",
 show_ntests();
 # ----------
 $td->notify("--- Miscellaneous Tests ---");
-$n_tests += 72;
+$n_tests += 73;
 
 $td->runtest("qpdf version",
 	     {$td->COMMAND => "qpdf --version"},
@@ -554,6 +554,11 @@ $td->runtest("check file",
              {$td->FILE => "a.pdf"},
              {$td->FILE => "indirect-decode-parms-out.pdf"});
 
+$td->runtest("handle page no with contents",
+             {$td->COMMAND => "qpdf --show-pages page-no-content.pdf"},
+             {$td->FILE => "page-no-content.out", $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
+
 show_ntests();
 # ----------
 $td->notify("--- Numeric range parsing tests ---");
diff --git a/qpdf/qtest/qpdf/page-no-content.out b/qpdf/qtest/qpdf/page-no-content.out
new file mode 100644
index 00000000..15df72db
--- /dev/null
+++ b/qpdf/qtest/qpdf/page-no-content.out
@@ -0,0 +1,8 @@
+page 1: 3 0 R
+  content:
+    6 0 R
+page 2: 4 0 R
+  content:
+page 3: 5 0 R
+  content:
+    9 0 R
diff --git a/qpdf/qtest/qpdf/page-no-content.pdf b/qpdf/qtest/qpdf/page-no-content.pdf
new file mode 100644
index 00000000..77b7832a
--- /dev/null
+++ b/qpdf/qtest/qpdf/page-no-content.pdf