====================================================
----------------------------------------
-- Stack trace at main.cc:113
----------------------------------------
0x7fb1cd831b05 __libc_start_main
0x50ac5a Workspace::immediate_execution(bool)
0x4543ae Command::process_line()
0x454867 Command::process_line(UCS_string&)
0x466666 Executable::execute_body() const
0x4d0d90 StateIndicator::run()
0x487242 Prefix::reduce_statements()
0x484d08 Prefix::reduce_MISC_F_C_B()
0x4cef60 StateIndicator::eval_XB(Token&, Token&, Token&)
0x4fc29f UserFunction::eval_XB(Value_P, Value_P)
0x4dce4a Symbol::push_value(Value_P)
0x4dbc8b Symbol::assign(Value_P, char const*)
0x506420 Value::clone(char const*) const
0x502ef1 Value::Value(Shape const&, char const*)
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