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6d35ae303a
Several error-handling paths returned without releasing a resource already acquired earlier in the function, or checked the wrong handle entirely, risking use of an unopened handle. Changes: - SysTablespace::read_lsn_and_check_flags(): close the datafile handle on header-validation failure. - xb_process_datadir(): check the freshly opened `dir` handle instead of the stale `dbdir`, fixing a handle leak and a possible use of an unopened directory handle. - wsrep.cc / xb_load_list_file(): close file handles before die(), and null-check fopen() results in wsrep.cc. - datadir_iter_new(): free datadir_path and destroy the mutex on the os_file_opendir() failure path.