Outer product of any function with empty left or right argument,
results in segmentation fault:
'abc' ∘.= ''
====================================================
SEGMENTATION FAULT
----------------------------------------
-- Stack trace at main.cc:122
----------------------------------------
0x7f90f668cb45 __libc_start_main
0x435995 main
0x529edd Workspace::immediate_execution(bool)
0x4651cd Command::process_line()
0x463edd Command::process_line(UCS_string&)
0x46e678 Executable::execute_body() const
0x4e4370 StateIndicator::run()
0x4912ca Prefix::reduce_statements()
0x48e293 Prefix::reduce_A_F_B_()
0x4e514a StateIndicator::eval_AB(Token&, Token&, Token&)
0x476173 DerivedFunction::eval_AB(Value_P, Value_P)
0x44df1d Bif_OPER2_PRODUCT::eval_ALRB(Value_P, Token&, Token&,
Value_P)
0x44b4ad Bif_OPER2_PRODUCT::outer_product(Value_P, Token&, Value_P)
0x44ad8a Bif_OPER2_PRODUCT::finish_outer_product(EOC_arg&)
0x45b9a4 Cell::init_from_value(Value_P, char const*)
0x45b7e9 Cell::init(Cell const&)
0x7f90f85e3890
0x47e22a
========================================
====================================================
-k
