openat() will always resolve symlinks, except if O_NOFOLLOW is passed or O_CREAT|O_EXCL is passed. This means that if a dangling symlink is passed to openat_report_new(), the first call to openat() will always fail with ENOENT and the second call to openat() will always fail with EEXIST. Let's catch this case explicitly and fallback to creating the file with just O_CREAT and assume we're the ones that created the file. We can't resolve the symlink with chase() because this function is itself called by chase() so we could end up in weird recursive calls if we'd try to do so.
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