inancgumus/learngo · error

wrong input: %q (line #%d)

Error message

wrong input: %q (line #%d)

What it means

Pointer-based parse(): fires when the visits field fails strconv.Atoi or is negative; the error is saved into p.lerr (no return value), which halts all further parsing and updating. The quoted token and line number let the user find the bad row in the log file.

Source

Thrown at 26-pointers/04-log-parser-pointers/parser.go:58

	var err error

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

View on GitHub (pinned to 3c475a78e5)

Solutions

1. Check p.lerr in main and stop with a clear message about the invalid line.
2. Filter out lines with non-numeric or negative visit counts before parsing.
3. Correct the source log so the visits column is a valid non-negative integer.

When it happens

Trigger: Thrown at 26-pointers/04-log-parser-pointers/parser.go:58 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/f27796b5e25f34b5. Report an issue: GitHub.