The latest version commit: 05dbbd134c3b9e2482998f267857dd3722001cd7 Build platform: Ubuntu 20.04 Test case: ``` class Foo extends Array { #x() { } } var bar = new Foo(); bar[0] = 1; ``` build options ``` python tools/build.py --debug ``` error msg: ``` ICE: Assertion 'ecma_is_lexical_environment (obj_p) || !ecma_op_object_is_fast_array (obj_p)' failed at jerry-core/ecma/base/ecma-helpers.c(ecma_find_named_property):613. Error: JERRY_FATAL_FAILED_ASSERTION Aborted (core dumped) ```