From e537705e3d30ea07642405fe72c6a152949d4705 Mon Sep 17 00:00:00 2001
From: hauntsaninja <>
Date: Fri, 10 Dec 2021 12:37:32 -0800
Subject: [PATCH 1/2] Remove assumption of case insensitivity

Originally added in #10093

Fixes #11690, fixes #10661, fixes #10822
---
 mypy/fscache.py | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/mypy/fscache.py b/mypy/fscache.py
index c77b941c551ca..fb651326fe49e 100644
--- a/mypy/fscache.py
+++ b/mypy/fscache.py
@@ -202,9 +202,6 @@ def isfile_case(self, path: str, prefix: str) -> bool:
 
         The caller must ensure that prefix is a valid file system prefix of path.
         """
-        if sys.platform == "linux":
-            # Assume that the file system on Linux is case sensitive
-            return self.isfile(path)
         if not self.isfile(path):
             # Fast path
             return False

From 7a5337f5955f0dd3af97e1159f59346846106e65 Mon Sep 17 00:00:00 2001
From: hauntsaninja <>
Date: Fri, 10 Dec 2021 13:11:41 -0800
Subject: [PATCH 2/2] lint

---
 mypy/fscache.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mypy/fscache.py b/mypy/fscache.py
index fb651326fe49e..ea71577b5f86d 100644
--- a/mypy/fscache.py
+++ b/mypy/fscache.py
@@ -30,7 +30,6 @@
 
 import os
 import stat
-import sys
 from typing import Dict, List, Set
 from mypy.util import hash_digest
 from mypy_extensions import mypyc_attr