if server crash and after restore mysqlbinlog not get recovered there is possibility of loosing data. still we can get important data with restoring from bin-log.
* Guess the the time of crash copy all bin-log files to separate folder ,in-case if you have backup of old date you need to select only those bin-log file having date after the dump taken .
* Run the command as such [better to go with one by one db recovery] .
/usr/local/mysql/bin/mysqlbinlog --database=pottytraining mysql-bin.000033 mysql-bin.000034>/opt/pottytraining.sql
* login to mysql prompt
mysql> use pottytraining;
mysql> source /opt/pottytraining.sql;
* Cool see the data.