[edflsafoiewq]

You would reject it of course, which is exactly why this code never appeared in a commit. The stage 0 of the exploit was not checked in, but directly added to the autogenerated build script in the release tarball, where, even if someone did review the script, it looks plausibly like other autogenerated build gunk. The complex and unreadable scripts in the further stages were hidden inside binary test files, so no one reviewing the commit that added them (https://git.tukaani.org/?p=xz.git;a=commit;h=cf44e4b) would directly see that code.