Trace:

    >> ping        DISPATCH (DBI::db=HASH(0xce2d58) rc1/1 @1 g2 ima405
+ pid#3528) at test.pl line 20
    -> ping for DBD::mysql::db (DBI::db=HASH(0xce2d58)~0xcf0178) thr#9
+a1010
    <- ping= ( 1 ) [1 items] at test.pl line 20
OK
    >> ping        DISPATCH (DBI::db=HASH(0xce2d58) rc1/1 @1 g2 ima405
+ pid#3528) at test.pl line 20
    -> ping for DBD::mysql::db (DBI::db=HASH(0xce2d58)~0xcf0178) thr#9
+a1010
    <- ping= ( 1 ) [1 items] at test.pl line 20
OK
    >> ping        DISPATCH (DBI::db=HASH(0xce2d58) rc1/1 @1 g2 ima405
+ pid#3528) at test.pl line 20
    -> ping for DBD::mysql::db (DBI::db=HASH(0xce2d58)~0xcf0178) thr#9
+a1010
    <- ping= ( 1 ) [1 items] at test.pl line 20
OK
    >> ping        DISPATCH (DBI::db=HASH(0xce2d58) rc1/1 @1 g2 ima405
+ pid#3528) at test.pl line 20
    -> ping for DBD::mysql::db (DBI::db=HASH(0xce2d58)~0xcf0178) thr#9
+a1010
imp_dbh->pmysql: d39230
my_login IMPSET but not ACTIVE so connect not skipped
imp_dbh->my_login : dbname = test, uid = root, pwd = ,host = 127.0.0.1
+, port = 3306
imp_dbh->mysql_dr_connect: host = |127.0.0.1|, port = 3306, uid = root
+, pwd = 
imp_dbh->bind_type_guessing: 0
imp_dbh->use_server_side_prepare: 0
imp_dbh->mysql_dr_connect: client_flags = 2
imp_dbh->mysql_dr_connect: <-        --> do_error
Can't connect to MySQL server on '127.0.0.1' (111) error 2003 recorded
+: Can't connect to MySQL server on '127.0.0.1' (111)
        <-- do_error
    !! ERROR: 2003 'Can't connect to MySQL server on '127.0.0.1' (111)
+' (err#0)
    <- ping= ( '' ) [1 items] at test.pl line 20
DBD::mysql::db ping failed: Can't connect to MySQL server on '127.0.0.
+1' (111) at test.pl line 20.
FAILED
    >> ping        DISPATCH (DBI::db=HASH(0xce2d58) rc1/1 @1 g2 ima405
+ pid#3528) at test.pl line 20
    -> ping for DBD::mysql::db (DBI::db=HASH(0xce2d58)~0xcf0178) thr#9
+a1010
imp_dbh->pmysql: d39230
my_login IMPSET but not ACTIVE so connect not skipped
imp_dbh->my_login : dbname = test, uid = root, pwd = ,host = 127.0.0.1
+, port = 3306
imp_dbh->mysql_dr_connect: host = |127.0.0.1|, port = 3306, uid = root
+, pwd = 
imp_dbh->bind_type_guessing: 0
imp_dbh->use_server_side_prepare: 0
imp_dbh->mysql_dr_connect: client_flags = 2
imp_dbh->mysql_dr_connect: <-*** Error in `perl': double free or corru
+ption (!prev): 0x0000000000d39230 ***
Aborted
[download]

Seems that when Ping is called from connection established by itself and this connection failed, memory is not handled properly inside mysql_dr_connect. Maybe i must just check if Ping returned a valid conection before calling it again.

Anyways using DBI->connect_cached instead of Ping solved my problem.

although I still curious.

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