SYNG1009 - Unterminated backref

Domain: sexp
Severity: USER

A backreference escape was started but not completed.

Backreferences (used in replacements) start with \ followed by a digit. This error occurs when \ appears at the end of input without a number.

Example

(:replace (str /(.*)/) "\\")

The replacement string ends with \ but no capture group number follows.

Solution

Add the capture group number after the backslash:

(:replace (str /(.*)/) "\1")

Capture groups are numbered starting from 1.

Related

SYNG1007