Return an array showing the 'length' last executed instructions in disassembled form. If 'verbose' is non-zero (the default), line number information are also included. Each string is built as this
Opcode-Address: Opcode Operand Mnemonic (Stackdepth) Linenumber
The linenumber information is appended if requested and a new source line is reached. Also, calls between objects produce a
Objectname Programname Linenumber
entry in the resulting array (in verbose mode only).
There is a preconfigured upper limit for the backtrace.