Fix segmentation fault on describing objects failures in test

Signed-off-by: Juan Cruz Viotti <[email protected]>

test/CMakeLists.txt

@@ -79,6 +79,7 @@ add_jsonschema_test_unix(metaschema/pass_single)
 add_jsonschema_test_unix(metaschema/pass_2020_12)
 
 # Test
+add_jsonschema_test_unix(test/fail_additional_properties)
 add_jsonschema_test_unix(test/fail_true_single_resolve)
 add_jsonschema_test_unix(test/fail_true_single_resolve_verbose)
 add_jsonschema_test_unix(test/fail_false_single_resolve)

test/test/fail_additional_properties.sh

@@ -0,0 +1,44 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+TMP="$(mktemp -d)"
+clean() { rm -rf "$TMP"; }
+trap clean EXIT
+
+cat << 'EOF' > "$TMP/schema.json"
+{
+  "id": "https://example.com",
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
+  "additionalProperties": false,
+  "properties": {
+    "foo": true,
+    "bar": true
+  }
+}
+EOF
+
+cat << 'EOF' > "$TMP/test.json"
+{
+  "target": "https://example.com",
+  "tests": [
+    {
+      "valid": false,
+      "data": { "fo": true }
+    }
+  ]
+}
+EOF
+
+"$1" test "$TMP/test.json" --resolve "$TMP/schema.json" 1> "$TMP/output.txt" 2>&1 \
+  && CODE="$?" || CODE="$?"
+test "$CODE" = "1" || exit 1
+
+cat << EOF > "$TMP/expected.txt"
+$(realpath "$TMP")/test.json:
+  1/1 FAIL <no description>
+EOF
+
+diff "$TMP/output.txt" "$TMP/expected.txt"