Issue #6074: Forward port Windows read-only source file fix from 2.7
diff --git a/Python/import.c b/Python/import.c
index beb0eec..4695c96 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -1174,6 +1174,12 @@
time_t mtime = srcstat->st_mtime;
#ifdef MS_WINDOWS /* since Windows uses different permissions */
mode_t mode = srcstat->st_mode & ~S_IEXEC;
+ /* Issue #6074: We ensure user write access, so we can delete it later
+ * when the source file changes. (On POSIX, this only requires write
+ * access to the directory, on Windows, we need write access to the file
+ * as well)
+ */
+ mode |= _S_IWRITE;
#else
mode_t mode = srcstat->st_mode & ~S_IXUSR & ~S_IXGRP & ~S_IXOTH;
mode_t dirmode = (srcstat->st_mode |