From f511cc61c18a8c73a58e26dd8d5b89a323e2aac5 Mon Sep 17 00:00:00 2001
From: Michael Stapelberg <michael@stapelberg.de>
Date: Sat, 9 Jan 2016 16:47:48 +0100
Subject: [PATCH] fix memory leak when swallowing windows

---
 include/window.h |  6 ++++++
 src/manage.c     |  3 +++
 src/tree.c       |  7 ++-----
 src/window.c     | 12 ++++++++++++
 4 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/include/window.h b/include/window.h
index 7a248277..d0b97f1d 100644
--- a/include/window.h
+++ b/include/window.h
@@ -9,6 +9,12 @@
  */
 #pragma once
 
+/**
+ * Frees an i3Window and all its members.
+ *
+ */
+void window_free(i3Window *win);
+
 /**
  * Updates the WM_CLASS (consisting of the class and instance) for the
  * given window.
diff --git a/src/manage.c b/src/manage.c
index 8e68c51e..2bcb47f3 100644
--- a/src/manage.c
+++ b/src/manage.c
@@ -310,6 +310,9 @@ void manage_window(xcb_window_t window, xcb_get_window_attributes_cookie_t cooki
             }
         }
     }
+    if (nc->window != cwindow && nc->window != NULL) {
+        window_free(nc->window);
+    }
     nc->window = cwindow;
     x_reinit(nc);
 
diff --git a/src/tree.c b/src/tree.c
index 5ff426ca..0c301209 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -266,11 +266,8 @@ bool tree_close_internal(Con *con, kill_window_t kill_window, bool dont_kill_par
             add_ignore_event(cookie.sequence, 0);
         }
         ipc_send_window_event("close", con);
-        FREE(con->window->class_class);
-        FREE(con->window->class_instance);
-        i3string_free(con->window->name);
-        FREE(con->window->ran_assignments);
-        FREE(con->window);
+        window_free(con->window);
+        con->window = NULL;
     }
 
     Con *ws = con_get_workspace(con);
diff --git a/src/window.c b/src/window.c
index bd4e2719..d6136c78 100644
--- a/src/window.c
+++ b/src/window.c
@@ -11,6 +11,18 @@
  */
 #include "all.h"
 
+/*
+ * Frees an i3Window and all its members.
+ *
+ */
+void window_free(i3Window *win) {
+    FREE(win->class_class);
+    FREE(win->class_instance);
+    i3string_free(win->name);
+    FREE(win->ran_assignments);
+    FREE(win);
+}
+
 /*
  * Updates the WM_CLASS (consisting of the class and instance) for the
  * given window.
-- 
2.39.2