diff --git a/pdfminer/pdfparser.py b/pdfminer/pdfparser.py
index 645e0dec..dae1af59 100644
--- a/pdfminer/pdfparser.py
+++ b/pdfminer/pdfparser.py
@@ -146,7 +146,12 @@ def flush(self) -> None:
     def do_keyword(self, pos: int, token: PSKeyword) -> None:
         if token is self.KEYWORD_R:
             # reference to indirect object
-            (_, _object_id), _ = self.pop(2)
+            try:
+                (_, _object_id), _ = self.pop(2)
+            except ValueError:
+                raise PDFSyntaxError(
+                    "Expected generation and object id in indirect object reference"
+                )
             object_id = safe_int(_object_id)
             if object_id is not None:
                 obj = PDFObjRef(self.doc, object_id)
diff --git a/pdfminer/utils.py b/pdfminer/utils.py
index 88b44b98..277cfe15 100644
--- a/pdfminer/utils.py
+++ b/pdfminer/utils.py
@@ -245,7 +245,7 @@ def parse_rect(o: Any) -> Rect:
     try:
         (x0, y0, x1, y1) = o
         return float(x0), float(y0), float(x1), float(y1)
-    except ValueError:
+    except (ValueError, TypeError):
         raise PDFValueError("Could not parse rectangle")