I was not really sure of how format by example worked:
'This is a description 55,550.' ⍕ t1[1;1]
==============================================================================
Assertion failed: row.size() == format.size()
in Function: format_by_example
in file: Bif_F12_FORMAT.cc:289
Call stack:
----------------------------------------
-- Stack trace at Bif_F12_FORMAT.cc:289
----------------------------------------
0x7FA80A0F4B97 __libc_start_main
0x5574C5E7DFE5 main
0x5574C6006085 Workspace::immediate_execution(bool)
0x5574C5EDEAB8 Command::process_line()
0x5574C5EDF6F8 Command::do_APL_expression(UCS_string&)
0x5574C5EDEBCD Command::finish_context()
0x5574C5EE7C37 Executable::execute_body() const
0x5574C5FA4734 StateIndicator::run()
0x5574C5F1E470 Prefix::reduce_statements()
0x5574C5F16A52 Prefix::reduce_A_F_B_()
0x5574C5EA29E3 Bif_F12_FORMAT::eval_AB(Value_P, Value_P)
0x5574C5EA2701 Bif_F12_FORMAT::format_by_example(Value_P, Value_P)
0x5574C5E93EE7 do_Assert(char const*, char const*, char
const*, int)
========================================
SI stack:
Depth: 0
Exec: 0x5574c8288a90
Safe exec: 0
Pmode: ◊ 'This is a description 55,550.' ⍕ t1[1;1]
PC: 8 (10) ENDL
Stat: 'This is a description 55,550.' ⍕ t1[1;1]
err_code: 0x0
==============================================================================
===================================================
SEGMENTATION FAULT
----------------------------------------
-- Stack trace at main.cc:88
----------------------------------------
0x7FA80AE278A0
0x5574C5E8512B
========================================
====================================================
Process apl exited abnormally with code 3
w
