commit bece862a0fc4fc18ef9065b18cd28e2032d0d975
from: Miles Alan <m@milesalan.com>
via: Hiltjo Posthuma <hiltjo@codemadness.org>
date: Sun Mar 13 16:32:56 2022 UTC

manage: For isfloating/oldstate check/set, ensure trans client actually exists

In certain instances trans may be set to a window that doesn't actually
map to a client via wintoclient; in this case it doesn't make sense
to set isfloating/oldstate since trans is essentially invalid in that
case / correlates to the above condition check where trans is set /
XGetTransientForHint is called.

commit - 60e9a14998bfe8666c641f7c27fec18e85ac7494
commit + bece862a0fc4fc18ef9065b18cd28e2032d0d975
blob - 1ee4ea29259b5bcc1c3cb2f22a0688424b0b54ce
blob + 5f16260aeb438ca9fa0a86eb6eb23ccab304e0b4
--- dwm.c
+++ dwm.c
@@ -1064,7 +1064,7 @@ manage(Window w, XWindowAttributes *wa)
 	XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
 	grabbuttons(c, 0);
 	if (!c->isfloating)
-		c->isfloating = c->oldstate = trans != None || c->isfixed;
+		c->isfloating = c->oldstate = t || c->isfixed;
 	if (c->isfloating)
 		XRaiseWindow(dpy, c->win);
 	attach(c);