After some playing around, I just decided to type an opening and closing paren:
*()* I then got the following error (trying again after restarting will not reproduce the error): Assertion failed: 0 in Function: init in file: Cell.cc:47 Call stack: ---------------------------------------- -- Stack trace at Cell.cc:47 ---------------------------------------- 0x7f6acde77de5 __libc_start_main 0x434735 main 0x51f53d Workspace::immediate_execution(bool) 0x461fad Command::process_line() 0x460eab Command::process_line(UCS_string&) 0x469de8 Executable::execute_body() const 0x4de0f0 StateIndicator::run() 0x48b17a Prefix::reduce_statements() 0x489144 Prefix::reduce_END_B__() 0x4e196a StateIndicator::statement_result(Token&) 0x4bfc7b Quad_CR::do_CR(long, Value const&) 0x51b8cb Value::clone(char const*) const 0x4594d1 Cell::init(Cell const&) 0x442e2f do_Assert(char const*, char const*, char const*, int) ======================================== SI stack: Depth: 7 Exec: 0xcbb400 Pmode: ◊ () PC: 2 RETURN_STATS Stat: () err_code: 0x0 thrown: at StateIndicator.cc:40 e_msg_1: 'No Error' e_msg_2: '' e_msg_3: '' Depth: 6 Exec: 0xcb2760 Pmode: ◊ 1 2 {⎕NC '⍺'} 10) PC: 5 RETURN_STATS Stat: 1 2 {⎕NC '⍺'} 10) err_code: 0x20002 thrown: at Prefix.cc:1048 e_msg_1: 'SYNTAX ERROR' e_msg_2: ' 1 2 λ1 10)' e_msg_3: ' ^ ^' Depth: 5 Exec: 0xcb43f8 Pmode: ∇ λ1[1] PC: 3 ⍺ Stat: λ←⍺⍺⍵⍵ err_code: 0x30001 thrown: at Symbol.cc:681 e_msg_1: 'VALUE ERROR' e_msg_2: 'λ1[1] λ←⍺ ⍺ ⍵ ⍵' e_msg_3: ' ^' Depth: 4 Exec: 0xcb1430 Pmode: ◊ {⍺⍺⍵⍵} 10 PC: 3 RETURN_STATS Stat: {⍺⍺⍵⍵} 10 err_code: 0x0 thrown: at StateIndicator.cc:40 e_msg_1: 'No Error' e_msg_2: '' e_msg_3: '' Depth: 3 Exec: 0xcaf5d0 Pmode: ◊ ∘.×⍳10 PC: 6 RETURN_STATS Stat: ∘.×⍳10 err_code: 0x50001 thrown: at Function.cc:119 e_msg_1: 'VALENCE ERROR' e_msg_2: ' ∘.×⍳10' e_msg_3: ' ^ ^' Depth: 2 Exec: 0xcae9b0 Pmode: ◊ 4/[2]'xyz' PC: 6 ENDL Stat: 4/[2]'xyz' err_code: 0x50006 thrown: at Value.cc:1072 e_msg_1: 'AXIS ERROR' e_msg_2: ' 4/[2]'xyz'' e_msg_3: ' ^ ^' Depth: 1 Exec: 0xcad530 Pmode: ◊ 4/[1.5]'xyz' PC: 6 ENDL Stat: 4/[1.5]'xyz' err_code: 0x50006 thrown: at Value.cc:1066 e_msg_1: 'AXIS ERROR' e_msg_2: ' 4/[1.5]'xyz'' e_msg_3: ' ^ ^' Depth: 0 Exec: 0xcada70 Pmode: ◊ 4 5/'xyz' PC: 3 ENDL Stat: 4 5/'xyz' err_code: 0x50003 thrown: at Bif_OPER1_REDUCE.cc:69 e_msg_1: 'LENGTH ERROR' e_msg_2: ' 4 5/'xyz'' e_msg_3: ' ^ ^' Regards, Elias