parse_ident_usermap() shuold use ereport(LOG) and not ERROR, and put the

return value in the *error_p variable.

Noted by Tom.

src/backend/libpq/hba.c

@@ -10,7 +10,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/libpq/hba.c,v 1.187 2009/06/21 20:15:32 petere Exp $
+ *	  $PostgreSQL: pgsql/src/backend/libpq/hba.c,v 1.188 2009/06/24 13:39:42 mha Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1493,7 +1493,7 @@ parse_ident_usermap(List *line, int line_number, const char *usermap_name,
 			char		errstr[100];
 
 			pg_regerror(r, &re, errstr, sizeof(errstr));
-			ereport(ERROR,
+			ereport(LOG,
 					(errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
 					 errmsg("invalid regular expression \"%s\": %s", file_ident_user + 1, errstr)));
 
@@ -1515,7 +1515,7 @@ parse_ident_usermap(List *line, int line_number, const char *usermap_name,
 			{
 				/* REG_NOMATCH is not an error, everything else is */
 				pg_regerror(r, &re, errstr, sizeof(errstr));
-				ereport(ERROR,
+				ereport(LOG,
 						(errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
 						 errmsg("regular expression match for \"%s\" failed: %s", file_ident_user + 1, errstr)));
 				*error_p = true;
@@ -1531,10 +1531,15 @@ parse_ident_usermap(List *line, int line_number, const char *usermap_name,
 		{
 			/* substitution of the first argument requested */
 			if (matches[1].rm_so < 0)
-				ereport(ERROR,
+			{
+				ereport(LOG,
 						(errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
 						 errmsg("regular expression \"%s\" has no subexpressions as requested by backreference in \"%s\"",
 								file_ident_user + 1, file_pgrole)));
+				pg_regfree(&re);
+				*error_p = true;
+				return;
+			}
 
 			/*
 			 * length: original length minus length of \1 plus length of match