Return a dict in the decompilation JSON, not a string with serialized…

… JSON.

pano/contract.py

@@ -1,4 +1,3 @@
-import json
 import logging
 
 import pano.folder as folder
@@ -58,14 +57,12 @@ def __init__(self, functions, problems):
 
         self.stor_defs = {}
 
-    def json(self):
-        return json.dumps(
-            {
-                "problems": self.problems,
-                "stor_defs": self.stor_defs,
-                "functions": [f.serialize() for f in self.functions],
-            }
-        )
+    def json(self) -> dict:
+        return {
+            "problems": self.problems,
+            "stor_defs": self.stor_defs,
+            "functions": [f.serialize() for f in self.functions],
+        }
 
     def load(self, data):
         self.problems = data["problems"]

pano/decompiler.py

@@ -192,9 +192,7 @@ def dec():
     try:
         decompilation.json = contract.json()
     except Exception:
-        # .json is a nice to have, whatever crazy error happens we should
-        # still proceed with the rest of decompilation
-        logger.exception("failed json serialization")
+        logger.exception("failed json dump")
 
     text_output = io.StringIO()
     with redirect_stdout(text_output):