From d7c364c5bb71b23047efea822215d739404a557e Mon Sep 17 00:00:00 2001
From: Nuno Campos <nuno@langchain.dev>
Date: Tue, 3 Jun 2025 17:23:45 -0700
Subject: [PATCH] Port step_timeout/GraphBubbleUp fix to v0

See fix and tests in original PR https://github.com/langchain-ai/langgraph/pull/4950
---
 libs/langgraph/langgraph/pregel/runner.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/langgraph/langgraph/pregel/runner.py b/libs/langgraph/langgraph/pregel/runner.py
index 59ede35f5..d65cd7dd0 100644
--- a/libs/langgraph/langgraph/pregel/runner.py
+++ b/libs/langgraph/langgraph/pregel/runner.py
@@ -431,7 +431,7 @@ class PregelRunner:
                         writes.extend(resumes)
                     self.put_writes()(task.id, writes)  # type: ignore[misc]
             elif isinstance(exception, GraphBubbleUp):
-                raise exception
+                pass
             else:
                 # save error to checkpointer
                 task.writes.append((ERROR, exception))