apache/maven · error · RuntimeException

Unexpected end of expression

Error message

Unexpected end of expression

What it means

Error "Unexpected end of expression" thrown in apache/maven.

Source

Thrown at impl/maven-impl/src/main/java/org/apache/maven/impl/model/profile/ConditionParser.java:312

     */
    private Object parseUnary() {
        if (current < tokens.size() && tokens.get(current).equals("-")) {
            current++;
            Object value = parseUnary();
            return negate(value);
        }
        return parseTerm();
    }

    /**
     * Parses individual terms (numbers, strings, booleans, parentheses, functions).
     *
     * @return the parsed term
     * @throws RuntimeException if the expression ends unexpectedly or contains unknown tokens
     */
    private Object parseTerm() {
        if (current >= tokens.size()) {
            throw new RuntimeException("Unexpected end of expression");
        }

        String token = tokens.get(current);
        if (token.equals("(")) {
            return parseParentheses();
        } else if (functions.containsKey(token)) {
            return parseFunction();
        } else if ((token.startsWith("\"") && token.endsWith("\"")) || (token.startsWith("'") && token.endsWith("'"))) {
            current++;
            return token.length() > 1 ? token.substring(1, token.length() - 1) : "";
        } else if (token.equalsIgnoreCase("true") || token.equalsIgnoreCase("false")) {
            current++;
            return Boolean.parseBoolean(token);
        } else if (token.startsWith("${") && token.endsWith("}")) {
            current++;
            String propertyName = token.substring(2, token.length() - 1);
            return propertyResolver.apply(propertyName);
        } else {

View on GitHub (pinned to e4093d4e12)

When it happens

Trigger: Thrown at impl/maven-impl/src/main/java/org/apache/maven/impl/model/profile/ConditionParser.java:312 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/maven@e4093d4e12 (2026-08-21). Data as JSON: /api/errors/4375c30af43f9354. Report an issue: GitHub.