suppress warnings

* string.c (rb_str_enumerate_lines): hint to suppress a
  maybe-uninitialized warning by gcc.

* thread.c (rb_fd_no_init): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57618 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/string.c b/string.c
index d894b24daf..b9bd9098da 100644
--- a/string.c
+++ b/string.c
@@ -7517,6 +7517,9 @@ rb_str_enumerate_lines(int argc, VALUE *argv, VALUE str, int wantarray)
 	    wantarray = 0;
 #endif
 	}
+#if defined __GNUC__ && !defined __clang__
+	ASSUME(wantarray || !ary); /* if wantarray, ary does not matter */
+#endif
     }
     else {
 	if (wantarray)