I’ve tried in the beta version published on 18/04/201
Compiling an invalid synonym opened from Invalid Objects view doesn’t work - I get an error message SQL command not properly ended.
ALTER PUBLIC SYNONYM ORA_ASPNET_MEM_CHANGEPWDQANDA COMPILE DEBUG
Error at line 2
ORA-00933: SQL command not properly ended
Listing Synonyms in invalid objects is not selected by default
There is no option to compile a synonym when listing in synonym view
There is no indication on Synonym view if a given synonym is valid or not.