Merge pull request #181 from freelawproject/fix-handle-invalid-error-…

…while-loading-db

fix(hyperscan): Handles the InvalidError exception during db loading.

CHANGES.md

@@ -11,7 +11,7 @@ Changes:
 - None
 
 Fixes:
-- None
+- Strengthens error handling during the loading of the cached Hyperscan database. This ensures that an invalid cache triggers a rebuild.
 
 
 ## Current

eyecite/tokenizers.py

@@ -528,6 +528,12 @@ def convert_regex(regex):
                         )
                     except TypeError:
                         hyperscan_db = hyperscan.loadb(cache_bytes)
+                    except hyperscan.InvalidError:
+                        # Skipping hyperscan_db assignment to force a full
+                        # database recompile as the cached version seems to be
+                        # invalid.
+                        pass
+
                     try:
                         # at some point Scratch became necessary --
                         # https://github.com/darvid/python-hyperscan/issues/50#issuecomment-1386243477