==25540== Possible data race reading variable at 0x1D52238C ==25540== at 0x674CB5: _IO_un_link_internal (in /lib/tls/libc-2.3.4.so) ==25540== by 0x668A5D: _IO_fclose@@GLIBC_2.1 (in /lib/tls/libc-2.3.4.so) ==25540== Address 0x1D52238C is 52 bytes inside a block of size 352 alloc'd by thread 1 ==25540== at 0x1D4A8090: malloc (vg_replace_malloc.c:131) ==25540== by 0x66935E: __fopen_internal (in /lib/tls/libc-2.3.4.so) ==25540== by 0x66941C: _IO_fopen@@GLIBC_2.1 (in /lib/tls/libc-2.3.4.so)