The 2.0b2 change to write .pyc files in exclusive mode (if possible)
unintentionally caused them to get written in text mode under Windows.
As a result, when .pyc files were later read-- in binary mode --the
magic number was always wrong (note that .pyc magic numbers deliberately
include \r and \n characters, so this was "good" breakage, 100% across
all .pyc files, not random corruption in a subset). Fixed that.
diff --git a/Python/import.c b/Python/import.c
index 533f85e..9ecd38d 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -646,7 +646,12 @@
*/
int fd;
(void) unlink(filename);
- fd = open(filename, O_EXCL|O_CREAT|O_WRONLY|O_TRUNC, 0666);
+ fd = open(filename, O_EXCL|O_CREAT|O_WRONLY|O_TRUNC
+#ifdef O_BINARY
+ |O_BINARY /* necessary for Windows */
+#endif
+
+ , 0666);
if (fd < 0)
return NULL;
return fdopen(fd, "wb");