Issue #14047 has been updated by nobu (Nobuyoshi Nakada).


Could you try this patch?

```diff
diff --git a/win32/win32.c b/win32/win32.c
index 62801dae71..7e8afb2ddc 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -4958,7 +4958,7 @@ rb_w32_read_reparse_point(const WCHAR *path, rb_w32_reparse_buffer_t *rp,
 	    ret = rp->SymbolicLinkReparseBuffer.PrintNameLength;
 	    *len = ret / sizeof(WCHAR);
 	}
-	else { /* IO_REPARSE_TAG_MOUNT_POINT */
+	else if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) {
 	    static const WCHAR *volume = L"Volume{";
 	    enum {volume_prefix_len = rb_strlen_lit("\\??\\")};
 	    name = ((char *)rp->MountPointReparseBuffer.PathBuffer +
@@ -4971,6 +4971,9 @@ rb_w32_read_reparse_point(const WCHAR *path, rb_w32_reparse_buffer_t *rp,
 		memcmp(name, volume, sizeof(volume) - 1 * sizeof(WCHAR)) == 0)
 		return -1;
 	}
+	else {
+	    return -1;
+	}
 	*result = name;
 	if (e) {
 	    if ((char *)name + ret + sizeof(WCHAR) > (char *)rp + bufsize)
```

----------------------------------------
Bug #14047: SEGV happen when running script under OneDrive directory if File On-Demand is enabled
https://bugs.ruby-lang.org/issues/14047#change-67569

* Author: what_alnk (わたる なかい)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.4.2p198 (2017-09-14 revision 59899) [x64-mingw32]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
After Windows 10 Fall Creators Update, SEGV happened when I run any script under OneDrive directory.
If File On-Demand was disabled, SEGV did not happened.

I attached the log.

OS: Windows 10 Pro Version 1709 Build 16299.19

---Files--------------------------------
2017-10-23-ruby-segv.txt (6.35 KB)


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