confused by multiline comments containing syntax

[josharian]

  {{/* {{ range $attr := .Attrs }}    
  {{ end }}   */}}

This causes a spurious error:

Error: Encountered unexpected end keyword.

[josharian]

This also happens for comments in other contexts. I also ran across this breakage:

{{ if .B }}
  {{/* if */}}
{{ end }}

yields:

Error: Missing end block.