----------------------------------------
-- Stack trace at Cell.cc:47
----------------------------------------
0x7fd2f972fb05 __libc_start_main
0x51556d Workspace::immediate_execution(bool)
0x45f4ad Command::process_line()
0x45e266 Command::process_line(UCS_string&)
0x467395 Executable::execute_body() const
0x4d9130 StateIndicator::run()
0x489443 Prefix::reduce_statements()
0x485763 Prefix::reduce_A_F_B_()
0x4d9f41 StateIndicator::eval_AB(Token&, Token&, Token&)
0x4b600f Quad_CR::eval_AB(Value_P, Value_P)
0x4b5e1b Quad_CR::do_CR(long, Value const&)
0x512f4b Value::clone(char const*) const
0x456f01 Cell::init(Cell const&)
0x440e41 do_Assert(char const*, char const*, char const*, int)
========================================
thrown: at StateIndicator.cc:39
==============================================================================
----------------------------------------
-- Stack trace at StateIndicator.cc:685
----------------------------------------
0x7fd2f972fb05 __libc_start_main
0x51556d Workspace::immediate_execution(bool)
0x45f4ad Command::process_line()
0x45e266 Command::process_line(UCS_string&)
0x467395 Executable::execute_body() const
0x4d9130 StateIndicator::run()
0x489443 Prefix::reduce_statements()
0x485763 Prefix::reduce_A_F_B_()
0x4da0ff StateIndicator::eval_AB(Token&, Token&, Token&)
========================================