https://github.com/facebook/hhvm/pull/3805.patch has as part of it:
diff --git a/hphp/test/slow/object_property/invalidWith__get.php.expectf b/hphp/test/slow/object_property/invalidWith__get.php.expectf index 033c3ac88947362c4227a3ae44d556d5d2665ef0..0dd4757a6bbe6cd99b57f092f3a5e69a4158fce3 100644 GIT binary patch delta 21 ccmey(*vd4agxfi>Bsn87DJNASZDMH~09UpM8~^|S delta 11 ScmZo=`pr0@gwbtceH#E7tpsHN
And when parsing it I'm getting Expected 'literal NNNN' to start git binary patch.
Your code looks like it isn't happy with the word delta and instead wants only literal.