From 73638589bad5ab7da3abdfd869d86217b93fe714 Mon Sep 17 00:00:00 2001
From: Sebastian Ehlert <28669218+awvwgk@users.noreply.github.com>
Date: Sat, 16 Jan 2021 13:53:02 +0100
Subject: [PATCH] Fix compilation error for NAG

NAG detects a duplicated name for error_handler which is defined
as module procedure as well as the name of the interface of said
procedure:

    Error: src/stdlib_bitsets.f90, line 2131: ERROR_HANDLER previously declared as a generic procedure name
           detected at ERROR_HANDLER@(
---
 src/stdlib_bitsets.fypp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/stdlib_bitsets.fypp b/src/stdlib_bitsets.fypp
index ad52517ab..f1f204ddd 100644
--- a/src/stdlib_bitsets.fypp
+++ b/src/stdlib_bitsets.fypp
@@ -2006,7 +2006,7 @@ module stdlib_bitsets
 
     end interface operator(<=)
 
-    interface error_handler
+    interface
         module subroutine error_handler( message, error, status, &
             module, procedure )
             character(*), intent(in)           :: message
@@ -2015,7 +2015,7 @@ module stdlib_bitsets
             character(*), intent(in), optional :: module
             character(*), intent(in), optional :: procedure
         end subroutine error_handler
-    end interface error_handler
+    end interface
 
 contains