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Set cause when failing due to linking a window to itself, from Martin
Pieuchot.
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@ -280,8 +280,10 @@ server_link_window(struct session *src, struct winlink *srcwl,
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if (dstidx != -1)
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dstwl = winlink_find_by_index(&dst->windows, dstidx);
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if (dstwl != NULL) {
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if (dstwl->window == srcwl->window)
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if (dstwl->window == srcwl->window) {
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xasprintf(cause, "same index: %d", dstidx);
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return (-1);
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}
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if (killflag) {
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/*
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* Can't use session_detach as it will destroy session
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