Actually ignore FNM_CASEFOLD flag in Dir.glob

This was already documented as being ignored, but it wasn't being
ignored, causing an issue in a particular case where a UTF-8
pattern was provided and a filename was tested that wasn't valid
UTF-8.

Fixes [Bug #14456]

1 files changed, 1 insertions, 1 deletions

diff --git a/dir.c b/dir.c
index d6a963f9d6..8ac10d2360 100644
--- a/dir.c
+++ b/dir.c
@@ -2955,7 +2955,7 @@ static VALUE
 dir_s_glob(rb_execution_context_t *ec, VALUE obj, VALUE str, VALUE rflags, VALUE base, VALUE sort)
 {
     VALUE ary = rb_check_array_type(str);
-    const int flags = NUM2INT(rflags) | dir_glob_option_sort(sort);
+    const int flags = (NUM2INT(rflags) | dir_glob_option_sort(sort)) & ~FNM_CASEFOLD;
     base = dir_glob_option_base(base);
     if (NIL_P(ary)) {
 	ary = rb_push_glob(str, base, flags);