SQL> create procedure test_proc
  2  is
  3  begin
  4  dbms_output.put_line('Test');
  5  end;
  6  /

Procedure created.

SQL> exec test_proc test_proc
BEGIN test_proc test_proc; END;

                *
ERROR at line 1:
ORA-06550: line 1, column 17:
PLS-00103: Encountered the symbol "TEST_PROC" when expecting one of the
following:
:= . ( @ % ;
The symbol ":=" was substituted for "TEST_PROC" to continue.


SQL> exec test_proc
Test

PL/SQL procedure successfully completed.

SQL> create or replace procedure i_got_errors
  2  as
  3  begin
  4    i got errors;
  5  emd;
  6  /

Warning: Procedure created with compilation errors.

SQL> show errors
Errors for PROCEDURE I_GOT_ERRORS:

LINE/COL ERROR
-------- -----------------------------------------------------------------
4/5      PLS-00103: Encountered the symbol "GOT" when expecting one of the
         following:
         := . ( @ % ;

5/4      PLS-00103: Encountered the symbol "end-of-file" when expecting
         one of the following:
         begin case declare end exception exit for goto if loop mod
         null pragma raise return select update while with
         <an identifier> <a double-quoted delimited-identifier>
         <a bind variable> << close current delete fetch lock insert
         open rollback savepoint set sql execute commit forall merge
         pipe

SQL> begin
  2    i_got_errors;
  3  end;
  4  /
  i_got_errors;
  *
ERROR at line 2:
ORA-06550: line 2, column 3:
PLS-00905: object SCOTT.I_GOT_ERRORS is invalid
ORA-06550: line 2, column 3:
PL/SQL: Statement ignored