""
""
""
""
"ab"
"cool!😀"
software_error("predicate `string.append_string_pieces\'/2: Unexpected: substring index out of range")
software_error("predicate `string.append_string_pieces\'/2: Unexpected: substring index out of range")
software_error("predicate `string.append_string_pieces\'/2: Unexpected: substring index out of range")
software_error("predicate `string.append_string_pieces\'/2: Unexpected: substring index out of range")
software_error("predicate `string.append_string_pieces\'/2: Unexpected: substring index out of range")