Bruce

It muse be double free bug. First backtrace: ``` (gdb) bt #0 CRYPTO_free (str=0x6237c0, file=0x7ffff78e8d51 "crypto/stack/stack.c", line=274) at crypto/mem.c:179 #1 0x00007ffff787b09c in OPENSSL_sk_free (st=0x6237c0) at crypto/stack/stack.c:274 #2 0x00000000004046a0 in sk_SSL_COMP_free...

OK, I copy some code from libimobiledevice project, and it works fine for different openssl versions.

@preshing I can use enqueue to destroy dynamic allocated object now? Can junction concurrent map support ```shared_ptr``` as value type? I appreciate your help, thank you very much! Does this...

Thanks for your quick reply. Can you help me to check the wrapper code above, its ```Insert``` and ```Clear``` can work properly？

Thank you very much，I have no idea how to safely destroy dynamic allocated object in the map，at this time i only can use the ```enqueue``` method.