Use full message if XHPAST fails to parse the file
Use full message if XHPAST fails to parse the file

Summary:
The message is too defensive.

Test Plan: Tested in the fork.

Reviewers: epriestley, nh

Reviewed By: epriestley

CC: aran, Korvin, s.o.butler

Differential Revision: https://secure.phabricator.com/D5043

wikimedia/phabricator-arcanist,phacility/arcanist,uber/arcanist,fivestars/arcanist,kevinseelbach/arcanist,alexmv/arcanist,chundongwang/arcanist,sneakpeeq/arcanist,KieranHayes/arcanist,wxstars/arcanist,phacility/arcanist,folsom-labs/arcanist,Khan/arcanist,hach-que/arcanist,aik099/arcanist,r4nt/arcanist,KieranHayes/arcanist,zhihu/arcanist,Khan/arcanist,dguo-coursera/arcanist,wikimedia/phabricator-arcanist,KieranHayes/arcanist,julkiewicz/arcanist,Symplicity/arcanist,wxstars/arcanist,haskell-infra/arcanist,sneakpeeq/arcanist,uber/arcanist,alexmv/arcanist,Symplicity/arcanist,eSpark/arcanist,eSpark/arcanist,julkiewicz/arcanist,calblueprint/arcanist,fivestars/arcanist,haskell-infra/arcanist,julkiewicz/arcanist,Khan/arcanist,jra3/arcanist,codelabs-ch/arcanist,memsql/arcanist,dguo-coursera/arcanist,kevinseelbach/arcanist,kevinseelbach/arcanist,wikimedia/phabricator-arcanist,kevinseelbach/arcanist,alexmv/arcanist,folsom-labs/arcanist,PageUpPeopleOrg/arcanist-patches,codelabs-ch/arcanist,hach-que/arcanist,zhihu/arcanist,fivestars/arcanist,eSpark/arcanist,Symplicity/arcanist,dguo-coursera/arcanist,calblueprint/arcanist,wxstars/arcanist,wharris/arcanist,r4nt/arcanist,calblueprint/arcanist,dguo-coursera/arcanist,wharris/arcanist,aik099/arcanist,julkiewicz/arcanist,sneakpeeq/arcanist,uber/arcanist,alexmv/arcanist,zhihu/arcanist,haskell-infra/arcanist,codelabs-ch/arcanist,codelabs-ch/arcanist,jra3/arcanist,memsql/arcanist,jra3/arcanist,chundongwang/arcanist,zhihu/arcanist,coursera/arcanist,phacility/arcanist,haskell-infra/arcanist,folsom-labs/arcanist,wharris/arcanist,coursera/arcanist,hach-que/arcanist,PageUpPeopleOrg/arcanist-patches,sneakpeeq/arcanist,uber/arcanist,wharris/arcanist,memsql/arcanist,hach-que/arcanist,folsom-labs/arcanist,memsql/arcanist,KieranHayes/arcanist,codelabs-ch/arcanist,wxstars/arcanist,coursera/arcanist,PageUpPeopleOrg/arcanist-patches,r4nt/arcanist,phacility/arcanist,phacility/arcanist,aik099/arcanist,eSpark/arcanist,PageUpPeopleOrg/arcanist-patches,aik099/arcanist,calblueprint/arcanist,Khan/arcanist,coursera/arcanist,chundongwang/arcanist,jra3/arcanist,wikimedia/phabricator-arcanist,Symplicity/arcanist,chundongwang/arcanist,r4nt/arcanist,fivestars/arcanist