MuntashirAkon/AppManager · error · RuntimeException

Unexpected char '" + c + "'.

Error message

Unexpected char '" + c + "'.

What it means

ParserHelper (SVG path/number parser) throws RuntimeException("Unexpected char '<c>'.") when parseFloat encounters a character that cannot start or continue a numeric value. It is an unchecked parsing failure for malformed SVG numeric data.

Solutions

1. Validate/normalize SVG path data before parsing (regex for numeric tokens, fix separators).
2. Catch RuntimeException around the SVG parse and fall back to skipping the malformed element.
3. Sanitize numbers: convert locale decimal commas to dots and remove duplicate dots before feeding the parser.
4. Regenerate the SVG from a known-good editor/exporter.

Example fix

// before
float v = parserHelper.parseFloat(); // RuntimeException on '2.3.4'
// after
try {
    float v = parserHelper.parseFloat();
} catch (RuntimeException e) {
    Log.w(TAG, "Skipping malformed SVG number", e);
}

if (!pathData.matches("[MmZzLlHhVvCcSsQqTtAa0-9eE+\\-., \\t\\r\\n]*")) throw new IllegalArgumentException("Malformed SVG path data");

try { value = parserHelper.parseFloat(); } catch (RuntimeException e) { Log.w(TAG, "Unexpected char in SVG data", e); value = 0f; }

When it happens

Trigger: Parsing SVG path data or numeric attributes where an unexpected character appears where a number (or separator) is expected — e.g. 'parseFloat("1.2.3")', letters inside coordinates, or a malformed command sequence.

Common situations: Hand-edited or generated SVG with malformed path data (missing separators, doubled dots, stray commas/letters); SVGs exported by buggy tools; user-uploaded icons; locale-corrupted numbers with decimal commas ('1,5' in some contexts).

Understand the failure class

Background: "Invalid ... format", "must be in format X", "does not look like a ..." — invalid argument format errors across CLI tools and libraries — this error's family across 17 libraries.

Related errors

• e
• Failed parsing settings file
• Failed to load rules from misc.
• Invalid attribute " + getAttributeName(index) + ": " + value
• Invalid format: componentStatus not found

AI-assisted analysis of MuntashirAkon/AppManager@0152f468fc (2026-09-12). Data as JSON: /api/errors/fa127ae88d4c0f86. Report an issue: GitHub.

Appendix: source

Thrown at app/src/main/java/io/github/muntashirakon/svg/ParserHelper.java:344

                            }
                        }
                }
            default:
        }

        if (!expPos) {
            exp = -exp;
        }
        exp += expAdj;
        if (!mantPos) {
            mant = -mant;
        }

        return buildFloat(mant, exp);
    }

    private void reportUnexpectedCharacterError(char c) {
        throw new RuntimeException("Unexpected char '" + c + "'.");
    }

    /**
     * Computes a float from mantissa and exponent.
     */
    public static float buildFloat(int mant, int exp) {
        if (exp < -125 || mant == 0) {
            return 0.0f;
        }

        if (exp >= 128) {
            return (mant > 0)
                    ? Float.POSITIVE_INFINITY
                    : Float.NEGATIVE_INFINITY;
        }

        if (exp == 0) {
            return mant;

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