From e2714545278c3a6cb06f7571a59e6ee4592785a2 Mon Sep 17 00:00:00 2001
From: Qian Zhao <112053249+C1rN09@users.noreply.github.com>
Date: Wed, 22 Feb 2023 00:25:36 +0800
Subject: [PATCH] [Fix] Temporarily fix collect_env raises errors and stops
 programs (#944)

* temporarily fix `collect_env` raise errors and stops programs

* remove the final catch block
---
 mmengine/utils/dl_utils/collect_env.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/mmengine/utils/dl_utils/collect_env.py b/mmengine/utils/dl_utils/collect_env.py
index 341e02aa..021503e7 100644
--- a/mmengine/utils/dl_utils/collect_env.py
+++ b/mmengine/utils/dl_utils/collect_env.py
@@ -95,6 +95,7 @@ def collect_env():
         # Check C++ Compiler.
         # For Unix-like, sysconfig has 'CC' variable like 'gcc -pthread ...',
         # indicating the compiler used, we use this to get the compiler name
+        import io
         import sysconfig
         cc = sysconfig.get_config_var('CC')
         if cc:
@@ -119,6 +120,12 @@ def collect_env():
             env_info['GCC'] = 'n/a'
     except (subprocess.CalledProcessError, errors.DistutilsPlatformError):
         env_info['GCC'] = 'n/a'
+    except io.UnsupportedOperation as e:
+        # JupyterLab on Windows changes sys.stdout, which has no `fileno` attr
+        # Refer to: https://github.com/open-mmlab/mmengine/issues/931
+        # TODO: find a solution to get compiler info in Windows JupyterLab,
+        # while preserving backward-compatibility in other systems.
+        env_info['MSVC'] = f'n/a, reason: {str(e)}'
 
     env_info['PyTorch'] = torch.__version__
     env_info['PyTorch compiling details'] = get_build_config()