inancgumus/learngo · error

wrong input: %q (line #%d)

Error message

wrong input: %q (line #%d)

What it means

parse() rejects the second field of a log line when strconv.Atoi fails or the parsed visits count is negative. It fires on non-numeric visit counts (e.g. "abc") or negative counts; %q quotes the offending token and p.lines identifies the line in the log file.

Source

Thrown at 25-functions/03-refactor-to-funcs/parser.go:49

	parsed.domain = fields[0]

	parsed.visits, err = strconv.Atoi(fields[1])
	if parsed.visits < 0 || err != nil {
		err = fmt.Errorf("wrong input: %q (line #%d)", fields[1], p.lines)
		return
	}

View on GitHub (pinned to 3c475a78e5)

Solutions

1. Validate the visits token is a non-negative integer before parsing the line.
2. Skip the bad line and continue with the remaining log lines.
3. Correct the log data so the second column is a valid non-negative number.

When it happens

Trigger: Thrown at 25-functions/03-refactor-to-funcs/parser.go:49 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of inancgumus/learngo@3c475a78e5 (2026-09-02). Data as JSON: /api/errors/66a95447f1729c93. Report an issue: GitHub.