Not a normal use-case but I thought y'all might be interested...
z ← ''
z ← z,⊂2 2 ⍴ 1
⊃,[;2]/z (3 3 ⍴ 2)
====================================================
SEGMENTATION FAULT
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-- Stack trace at main.cc:88
----------------------------------------
0x7F789E12609B __libc_start_main
0x558E3D054955 main
0x558E3D1C0C05 Workspace::immediate_execution(bool)
0x558E3D0A52E8 Command::process_line()
0x558E3D0A5C66 Command::do_APL_expression(UCS_string&)
0x558E3D0A540F Command::finish_context()
0x558E3D0AEBE7 Executable::execute_body() const
0x558E3D160720 StateIndicator::run()
0x558E3D0E9684 Prefix::reduce_statements()
0x558E3D0E84E7 Prefix::reduce_MISC_F_B_()
0x558E3D0B61E1 DerivedFunction::eval_B(Value_P)
0x558E3D080D1E Bif_OPER1_REDUCE::eval_LB(Token&, Value_P)
0x558E3D085F2B Bif_REDUCE::reduce(Token&, Value_P, unsigned int)
0x558E3D08587B Bif_REDUCE::do_reduce(Shape const&, Shape3 const&, long, Function*, Value_P, long)
0x558E3D0B65DD DerivedFunction::eval_AB(Value_P, Value_P)
0x558E3D0F2B3E Bif_F12_COMMA::eval_AXB(Value_P, Value_P, Value_P)
0x7F789E667730
0x558E3D05AECB
========================================
====================================================
Let me know how I can help!