From 1456058ecd7cc6f53acdd60140173d5cf40df7f1 Mon Sep 17 00:00:00 2001
From: Patcher <max.mustermann@example.com>
Date: Thu, 21 Aug 2025 11:39:59 +0000
Subject: [PATCH 1/2] [fix] Fix crash when inferring namedtuple with invalid
 field name

---
 ChangeLog              |  4 ++++
 astroid/exceptions.py  |  5 ++++-
 tests/test_regrtest.py | 11 +++++++++++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index b49d64746b..b98d60e318 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,10 @@ What's New in astroid 4.0.0?
 ============================
 Release date: TBA
 
+* Fix crash when inferring namedtuple with invalid field name
+
+  Closes #2519
+
 * Fix false positive no-member in except * handler.
 
   Closes pylint-dev/pylint#9056
diff --git a/astroid/exceptions.py b/astroid/exceptions.py
index 126acb954d..e523b70c35 100644
--- a/astroid/exceptions.py
+++ b/astroid/exceptions.py
@@ -64,7 +64,10 @@ def __init__(self, message: str = "", **kws: Any) -> None:
             setattr(self, key, value)
 
     def __str__(self) -> str:
-        return self.message.format(**vars(self))
+        try:
+            return self.message.format(**vars(self))
+        except ValueError:
+            return self.message  # Return raw message if formatting fails
 
 
 class AstroidBuildingError(AstroidError):
diff --git a/tests/test_regrtest.py b/tests/test_regrtest.py
index 9fcc378dc6..1b16662c68 100644
--- a/tests/test_regrtest.py
+++ b/tests/test_regrtest.py
@@ -550,3 +550,14 @@ def test_regression_infer_dict_literal_comparison_uninferable() -> None:
     node = extract_node("{{}}>0")
     inferred = next(node.infer())
     assert inferred.value == Uninferable
+
+
+def test_regression_infer_namedtuple_invalid_fieldname_error() -> None:
+    """Regression test for issue #2519."""
+    code = """
+    from collections import namedtuple
+    namedtuple('a','}')
+    """
+    node = extract_node(code)
+    inferred = next(node.infer())
+    assert inferred.value == Uninferable

From 91fe49f262a91044ff84cef81d64030f1b75ef18 Mon Sep 17 00:00:00 2001
From: Synrom <30272537+Synrom@users.noreply.github.com>
Date: Thu, 21 Aug 2025 16:42:30 +0200
Subject: [PATCH 2/2] Update ChangeLog

Co-authored-by: Pierre Sassoulas <pierre.sassoulas@gmail.com>
---
 ChangeLog | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index b98d60e318..47bb4d19b7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,7 +7,7 @@ What's New in astroid 4.0.0?
 ============================
 Release date: TBA
 
-* Fix crash when inferring namedtuple with invalid field name
+* Fix crash when inferring namedtuple with invalid field name looking like f-string formatting.
 
   Closes #2519