Fixing crash in linter when ASN.1 doesn't parse

3 jobs for main in 1 minute and 15 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Check Schemas
passed #6536
checkASN1

00:00:25

passed #6538
checkXSD

00:00:24

passed #6537
lintASN1

00:00:25