Assertion failure: r < rho_rho in get_transposed_shape_item

[Ben Harris]

Hello, I'm afraid it's me again.  I've got an assertion failure for you 
this time.  I realised while minimising the test case that I'd actually 
got the expression wrong, but it still shouldn't do this:

      ⊃(⊂1⍴0)((1 1)⍴0)

==============================================================================
Assertion failed: r < rho_rho
in Function:      get_transposed_shape_item
in file:          Shape.hh:113

Call stack:

----------------------------------------
-- Stack trace at Shape.hh:113
----------------------------------------
0xF7833E81 __libc_start_main
0x5669C668  main
0x568684B7   Workspace::immediate_execution(bool)
0x56707D5E    Command::process_line()
0x56708909     Command::do_APL_expression(UCS_string&)
0x56707E4E      Command::finish_context()
0x56711896       Executable::execute_body() const
0x567F80E1        StateIndicator::run()
0x5674F399         Prefix::reduce_statements()
0x56749F8E          Prefix::reduce_MISC_F_B_()
0x5676D6E4           Bif_F12_PICK::eval_B(Value_P)
0x5676433B            Bif_F12_PICK::disclose(Value_P, bool)
0x566CF27B             Bif_F12_TAKE::fill(Shape const&, Cell*, Value&, Value_P)
0x566B502F              do_Assert(char const*, char const*, char const*, int)
========================================

SI stack:

Depth:      0
Exec:       0x573ba5a0
Safe exec:  0
Pmode:      ◊  ⊃(⊂1⍴0)((1 1)⍴0)
PC:         13 (14) RETURN_STATS
Stat:       ⊃(⊂1⍴0)((1 1)⍴0)
err_code:   0x0


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