[BUG] Open intervals with null values don't work: "Could not parse EDTF value '1937/' for indexing node/nid"

[rosiel]

What steps does it take to reproduce the issue?

• When does this issue occur?
  When indexing items with an open interval with a null value e.g. '1937/'

• Which page does it occur on?
  Errors are in watchdog and come from indexing in EDTF Year.

• What happens?
  The years don't get added for faceting.

• To whom does it occur (anonymous visitor, editor, administrator)?
  Content editors / searchers

• What did you expect to happen?
  The null-valued intervals should be treated the same as open-ended intervals that use, e.g. /...

Which version of Islandora are you using?
2

Any related open or closed issues to this bug report?
no

Screenshots:

[seth-shaw-asu]

Resolved with e799093