Specify encoding in Popen. Fixes pypa#12070.

jaraco · jaraco · commit 68bb4de97219 · 2023-06-02T11:46:11.000-04:00
diff --git a/src/pip/_internal/utils/subprocess.py b/src/pip/_internal/utils/subprocess.py
@@ -146,6 +146,7 @@ def call_subprocess(
             stderr=subprocess.STDOUT if not stdout_only else subprocess.PIPE,
             cwd=cwd,
             env=env,
+            encoding='utf-8',
             errors="backslashreplace",
         )
     except Exception as exc:

Original file line number	Diff line number	Diff line change
`@@ -146,6 +146,7 @@ def call_subprocess(`
`146`	`146`	`stderr=subprocess.STDOUT if not stdout_only else subprocess.PIPE,`
`147`	`147`	`cwd=cwd,`
`148`	`148`	`env=env,`
	`149`	`+ encoding='utf-8',`
`149`	`150`	`errors="backslashreplace",`
`150`	`151`	`)`
`151`	`152`	`except Exception as exc:`