[Bug-apl] Crash when displaying the result of ⎕ NL

[Elias Mårtenson]

To reproduce, simply start GNU APL and run the following:

4⎕CR ⎕NL 1

This results in the following assertion error because the cell type is CT_BASE, for which there is no case statement:

Assertion failed: 0

in Function:      init

in file:          Cell.cc:47

Call stack:

----------------------------------------

-- Stack trace at Cell.cc:47

----------------------------------------

0x7fd2f972fb05 __libc_start_main

0x432a35  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)

========================================

SI stack:

Depth:    0

Exec:     0x167b610

Pmode:    ◊  4⎕CR ⎕NL 1

PC:       4 ENDL

Stat:     4⎕CR ⎕NL 1

err_code: 0x0

thrown:   at StateIndicator.cc:39

e_msg_1:  'No Error'

e_msg_2:  ''

e_msg_3:  ''

==============================================================================

----------------------------------------

-- Stack trace at StateIndicator.cc:685

----------------------------------------

0x7fd2f972fb05 __libc_start_main

0x432a35  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&)

========================================

Regards,

Elias