From b4bcfb35316a4973e6184211867a1248b9fe8feb Mon Sep 17 00:00:00 2001
From: Chang Wang <743976+cheapsteak@users.noreply.github.com>
Date: Thu, 12 Nov 2026 10:54:03 -0500
Subject: [PATCH] Preserve the suppressed context of an original error

GraphQLError copied the context of an original error but not its
__suppress_context__ flag, so an error raised "from None" got its
hidden context back when it was wrapped, e.g. by located_error.

Fixes #319

Claude-Session: https://claude.ai/code/session_01R8Hmf6XiRffNRSfDMNSFjh
---
 src/graphql/error/graphql_error.py |  1 +
 tests/error/test_graphql_error.py  | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/graphql/error/graphql_error.py b/src/graphql/error/graphql_error.py
index 668aec11..e346e26b 100644
--- a/src/graphql/error/graphql_error.py
+++ b/src/graphql/error/graphql_error.py
@@ -314,6 +314,7 @@ def __init__(
                     self.__cause__ = original_error.__cause__
                 elif original_error.__context__:
                     self.__context__ = original_error.__context__
+                    self.__suppress_context__ = original_error.__suppress_context__
 
         if extensions is None and underlying_error is not None:
             original_extensions = getattr(underlying_error, "extensions", None)
diff --git a/tests/error/test_graphql_error.py b/tests/error/test_graphql_error.py
index 7ff14ff6..28032aaf 100644
--- a/tests/error/test_graphql_error.py
+++ b/tests/error/test_graphql_error.py
@@ -119,6 +119,19 @@ def passes_the_context_of_an_original_error():
         e = GraphQLError("msg", original_error=original)
         assert e.__context__ is context
 
+    def passes_the_suppressed_context_of_an_original_error():
+        context = ValueError("hidden")
+        try:
+            raise context
+        except ValueError:
+            try:
+                raise RuntimeError("effect") from None
+            except RuntimeError as runtime_error:
+                original = runtime_error
+        e = GraphQLError("msg", original_error=original)
+        assert e.__context__ is context
+        assert e.__suppress_context__ is True
+
     def passes_the_cause_of_an_original_error():
         cause = ValueError("cause")
         try: