Fix for BUG#32880 - Repairing Archive table fails with internal error 144

Any statement reading corrupt archive data file
(CHECK/REPAIR/SELECT/UPDATE/DELETE) may cause assertion
failure in debug builds. This assertion has been removed
and an error is returned instead.

Also fixed that CHECK/REPAIR returns vague error message
when it mets corruption in archive data file. This is
fixed by returning proper error code.

mysql-test/r/archive.result:
  A test case for BUG#32880
mysql-test/std_data/bug32880.ARN:
  corrupted archive table to test check and repair table operation
mysql-test/std_data/bug32880.ARZ:
  corrupted archive table to test check and repair table operation
mysql-test/std_data/bug32880.frm:
  corrupted archive table to test check and repair table operation
mysql-test/t/archive.test:
  A test case for BUG#32880
storage/archive/ha_archive.cc:
  Fixed unpack_row() to return the error instead of throwing assertion 
  and also fixed repair() to throw better error when repair table
  operation fails on corrupted archive table

mysql-test/r/archive.result

@@ -12695,3 +12695,22 @@ a	b
 1	NULL
 2	NULL
 DROP TABLE t1;
+#
+# BUG#32880 - Repairing Archive table fails with internal error 144
+#
+
+# Test with an existing table which is corrupted
+# Copy t1 from std_data
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL,
+  `b` blob
+) ENGINE=ARCHIVE DEFAULT CHARSET=latin1
+CHECK TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	error	Corrupt
+REPAIR TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	repair	error	Corrupt
+DROP TABLE t1;

mysql-test/t/archive.test

@@ -1599,3 +1599,18 @@ INSERT INTO t1 VALUES (NULL, NULL),(NULL, NULL);
 FLUSH TABLE t1;
 SELECT * FROM t1 ORDER BY a;
 DROP TABLE t1;
+
+--echo #
+--echo # BUG#32880 - Repairing Archive table fails with internal error 144
+--echo #
+--echo 
+--echo # Test with an existing table which is corrupted
+--echo # Copy t1 from std_data
+let $MYSQLD_DATADIR= `select @@datadir`;
+copy_file std_data/bug32880.frm $MYSQLD_DATADIR/test/t1.frm;
+copy_file std_data/bug32880.ARZ $MYSQLD_DATADIR/test/t1.ARZ;
+copy_file std_data/bug32880.ARN $MYSQLD_DATADIR/test/t1.ARN;
+SHOW CREATE TABLE t1;
+CHECK TABLE t1;
+REPAIR TABLE t1;
+DROP TABLE t1;

storage/archive/ha_archive.cc

@@ -1076,11 +1076,9 @@ int ha_archive::unpack_row(azio_stream *file_to_read, uchar *record)
 
   read= azread(file_to_read, record_buffer->buffer, row_len, &error);
 
-  DBUG_ASSERT(row_len == read);
-
   if (read != row_len || error)
   {
-    DBUG_RETURN(-1);
+    DBUG_RETURN(HA_ERR_CRASHED_ON_USAGE);
   }
 
   /* Copy null bits */
@@ -1257,7 +1255,7 @@ int ha_archive::repair(THD* thd, HA_CHECK_OPT* check_opt)
   int rc= optimize(thd, check_opt);
 
   if (rc)
-    DBUG_RETURN(HA_ERR_CRASHED_ON_REPAIR);
+    DBUG_RETURN(HA_ADMIN_CORRUPT);
 
   share->crashed= FALSE;
   DBUG_RETURN(0);