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-rw-r--r--include/ruby/internal/intern/string.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/ruby/internal/intern/string.h b/include/ruby/internal/intern/string.h
index 1cb33a6441..0e2e6d6af7 100644
--- a/include/ruby/internal/intern/string.h
+++ b/include/ruby/internal/intern/string.h
@@ -553,6 +553,7 @@ VALUE rb_str_buf_append(VALUE dst, VALUE src);
/** @alias{rb_str_cat} */
VALUE rb_str_buf_cat(VALUE, const char*, long);
+RBIMPL_ATTR_NONNULL(())
/** @alias{rb_str_cat_cstr} */
VALUE rb_str_buf_cat2(VALUE, const char*);
@@ -888,6 +889,7 @@ RBIMPL_ATTR_NONNULL(())
*/
VALUE rb_str_cat_cstr(VALUE dst, const char *src);
+RBIMPL_ATTR_NONNULL(())
/** @alias{rb_str_cat_cstr} */
VALUE rb_str_cat2(VALUE, const char*);