updated for version 7.4.505

Problem:    On MS-Windows when 'encoding' is a double-byte encoding a file
            name longer than MAX_PATH bytes but shorter than that in
            characters causes problems.
Solution:   Fail on file names longer than MAX_PATH bytes. (Ken Takata)

src/os_win32.c

@@ -6139,6 +6139,13 @@ mch_open(char *name, int flags, int mode)
     }
 # endif
 
+    /* open() can open a file which name is longer than _MAX_PATH bytes
+     * and shorter than _MAX_PATH characters successfully, but sometimes it
+     * causes unexpected error in another part. We make it an error explicitly
+     * here. */
+    if (strlen(name) >= _MAX_PATH)
+	return -1;
+
     return open(name, flags, mode);
 }
 
@@ -6188,6 +6195,13 @@ mch_fopen(char *name, char *mode)
 	 * the _wfopen() fails for missing wide functions. */
     }
 
+    /* fopen() can open a file which name is longer than _MAX_PATH bytes
+     * and shorter than _MAX_PATH characters successfully, but sometimes it
+     * causes unexpected error in another part. We make it an error explicitly
+     * here. */
+    if (strlen(name) >= _MAX_PATH)
+	return NULL;
+
     return fopen(name, mode);
 }
 #endif

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    505,
 /**/
     504,
 /**/