commit d0cd013653360f6f11e3b5dbdbbf3788a5c08b02
Author: Gregg Townsend <gmt@cs.arizona.edu>
Date:   Thu Dec 4 15:37:39 2014 -0700

    Handle $DISPLAY longer than 63 characters.
    First seen as a problem on Macintosh OS X 10.10 ("Yosemite").
    Side effects revealed other bugs in cross-display CopyArea and
    gamma correction.

diff --git a/src/h/graphics.h b/src/h/graphics.h
--- a/src/h/graphics.h
+++ b/src/h/graphics.h
@@ -201,7 +201,7 @@
 typedef struct _wdisplay {
    int		refcount;
    int		serial;			/* serial # */
-   char		name[MAXDISPLAYNAME];
+   char		*name;
    Display *	display;
    Visual *	visual;
    GC		icongc;
diff --git a/src/h/xwin.h b/src/h/xwin.h
--- a/src/h/xwin.h
+++ b/src/h/xwin.h
@@ -73,7 +73,6 @@
  */
 #define WMAXCOLORS	256
 #define MAXCOLORNAME	40
-#define MAXDISPLAYNAME	64
 #define CSHARED         0
 #define CMUTABLE        1
 #define NUMCURSORSYMS	78
diff --git a/src/runtime/rxrsc.ri b/src/runtime/rxrsc.ri
--- a/src/runtime/rxrsc.ri
+++ b/src/runtime/rxrsc.ri
@@ -376,7 +376,7 @@
 
    GRFX_ALLOC(wd, _wdisplay);
 
-   strcpy(wd->name,s);
+   wd->name = salloc(s);
    wd->display = XOpenDisplay((*s=='\0') ? NULL : s);
 
    if (wd->display == NULL) {