Fix bug where crossgen would throw OOM when given an input with no dir-separator characters (overflow bug) (#24559)
Fix bug where crossgen would throw OOM when given an input with no dir-separator characters (overflow bug) (#24559)


cshung/coreclr,poizan42/coreclr,krk/coreclr,cshung/coreclr,wtgodbe/coreclr,poizan42/coreclr,krk/coreclr,poizan42/coreclr,cshung/coreclr,krk/coreclr,cshung/coreclr,wtgodbe/coreclr,poizan42/coreclr,cshung/coreclr,poizan42/coreclr,krk/coreclr,krk/coreclr,cshung/coreclr,krk/coreclr,wtgodbe/coreclr,wtgodbe/coreclr,poizan42/coreclr,wtgodbe/coreclr,wtgodbe/coreclr