uart interrupt subroutine create following error.
could you please tell what goes wrong here.

abort() was called at PC 0x40082b05 on core 0
0x40082b05: lock_acquire_generic at /home/zlt-b39/esp/esp-idf/components/newlib/./locks.c:141


Backtrace: 0x40087310:0x3ffb01c0 0x400874e7:0x3ffb01e0 ...

This is just a query. I am looking for following details.

Where to find source code
license of libat_core.a