bpo-19891: Ignore error while writing history file (GH-8483)

miss-islington · asottile · web-flow · commit e20d31cdb33b · 2018-08-06T02:15:42.000-07:00
(cherry picked from commit b249966) Co-authored-by: Anthony Sottile <asottile@umich.edu>
diff --git a/Lib/site.py b/Lib/site.py
@@ -418,7 +418,16 @@ def register_readline():
                 readline.read_history_file(history)
             except IOError:
                 pass
-            atexit.register(readline.write_history_file, history)
+
+            def write_history():
+                try:
+                    readline.write_history_file(history)
+                except (FileNotFoundError, PermissionError):
+                    # home directory does not exist or is not writable
+                    # https://bugs.python.org/issue19891
+                    pass
+
+            atexit.register(write_history)
 
     sys.__interactivehook__ = register_readline
 
diff --git a/Misc/NEWS.d/next/Library/2018-07-26-08-45-49.bpo-19891.Y-3IiB.rst b/Misc/NEWS.d/next/Library/2018-07-26-08-45-49.bpo-19891.Y-3IiB.rst
@@ -0,0 +1,2 @@
+Ignore errors caused by missing / non-writable homedir while writing history
+during exit of an interactive session.  Patch by Anthony Sottile.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Ignore errors caused by missing / non-writable homedir while writing history`
	`2`	`+during exit of an interactive session. Patch by Anthony Sottile.`