1 files changed, 14 insertions, 1 deletions
diff --git a/io.c b/io.c
index 3efc5349b5..837c1b6ded 100644
--- a/io.c
+++ b/io.c
@@ -399,7 +399,20 @@ rb_cloexec_fcntl_dupfd(int fd, int minfd)
 #  endif
 #endif
 
-#define rb_sys_fail_path(path) rb_sys_fail_str(path)
+#ifdef RUBY_FUNCTION_NAME_STRING
+# define rb_sys_fail_path(path) rb_sys_fail_path0(RUBY_FUNCTION_NAME_STRING, path)
+NORETURN(static void rb_sys_fail_path0(const char *,VALUE));
+static void
+rb_sys_fail_path0(const char *func_name, VALUE path)
+{
+    VALUE mesg = rb_str_new_cstr(func_name);
+    rb_str_buf_cat2(mesg, ": ");
+    rb_str_buf_append(mesg, path);
+    rb_sys_fail_str(mesg);
+}
+#else
+# define rb_sys_fail_path(path) rb_sys_fail_str(path)
+#endif
 
 static int io_fflush(rb_io_t *);
 static rb_io_t *flush_before_seek(rb_io_t *fptr);