Add json fuzzer with seed files from #1123 and test suite

...as well as some cases generated in CI from earlier attempts at
fixing this.

1 files changed, 15 insertions, 0 deletions

diff --git a/fuzz/json_fuzzer_seed_corpus/42e6870113caad944b36ff500693c7f3cffa82df b/fuzz/json_fuzzer_seed_corpus/42e6870113caad944b36ff500693c7f3cffa82df
new file mode 100644
index 00000000..7f68f756
--- /dev/null
+++ b/fuzz/json_fuzzer_seed_corpus/42e6870113caad944b36ff500693c7f3cffa82df
@@ -0,0 +1,15 @@
+{
+  "qpdf": [
+    {
+      "jsonversion": 2,
+      "pdfversion": "1.7"
+    },
+    {
+      "obj:1 0 R": {
+        "stream": {
+          "dict": "quack"
+        }
+      }
+    }
+  ]
+}