From b4ff2c37bf75b05837fa254fd88f49acc80f16d1 Mon Sep 17 00:00:00 2001
From: Andrey Kolomoets <andreyk.mad@gmail.com>
Date: Thu, 10 May 2018 22:11:42 +0300
Subject: [PATCH] Check major mode with derived-mode-p

Solves https://github.com/realgud/realgud/issues/216
---
 realgud/common/utils.el | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/realgud/common/utils.el b/realgud/common/utils.el
index 9a6d8d37..ff6106dd 100644
--- a/realgud/common/utils.el
+++ b/realgud/common/utils.el
@@ -46,10 +46,10 @@
     - 'comint if the major comint-mode or shell-mode
 Or raise an error if neither."
 
-  (cond ((eq major-mode 'eshell-mode)
-	'eshell)
-	((or (eq major-mode 'comint-mode) (eq major-mode 'shell-mode))
-	  'comint)
+  (cond ((derived-mode-p 'eshell-mode)
+	 'eshell)
+	((derived-mode-p 'comint-mode)
+	 'comint)
 	('t (error "We can only handle comint, shell, or eshell buffers"))
 	))