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-rw-r--r--x11vnc/xwrappers.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/x11vnc/xwrappers.c b/x11vnc/xwrappers.c
index d16b7c9..160c76d 100644
--- a/x11vnc/xwrappers.c
+++ b/x11vnc/xwrappers.c
@@ -189,6 +189,7 @@ Status XShmAttach_wr(Display *disp, XShmSegmentInfo *shminfo) {
Status XShmDetach_wr(Display *disp, XShmSegmentInfo *shminfo) {
#if LIBVNCSERVER_HAVE_XSHM
+ if (getenv("X11VNC_SHM_DEBUG")) fprintf(stderr, "XShmDetach_wr: 0x%x disp: 0x%x\n", shminfo, disp);
return XShmDetach(disp, shminfo);
#else
if (!disp || !shminfo) {}