From 46ed1fc7866eee3f27e6dbf2c786a6a88f6b4365 Mon Sep 17 00:00:00 2001
From: hauntsaninja <hauntsaninja@gmail.com>
Date: Sat, 16 Sep 2023 00:41:52 -0700
Subject: [PATCH] Fix mypyc regression with pretty

Fixes #15877

Regression was introduced by #15070. Previously Errors objects created
in mypyc build would just use all the default values, now they use the
actual options object involved
---
 mypy/errors.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mypy/errors.py b/mypy/errors.py
index a678b790cb8c..4e62a48aeb27 100644
--- a/mypy/errors.py
+++ b/mypy/errors.py
@@ -909,8 +909,7 @@ def file_messages(self, path: str) -> list[str]:
             return []
         self.flushed_files.add(path)
         source_lines = None
-        if self.options.pretty:
-            assert self.read_source
+        if self.options.pretty and self.read_source:
             source_lines = self.read_source(path)
         return self.format_messages(self.error_info_map[path], source_lines)