ESLint/Espree breaks Acorn?

eslint-acorn2.7-babel.js

'use strict';

/*
 * syntax-error erroed after eslint executed.
 * 
 * acorn@2.7.0
 * eslint@2.0.0
 * babel-eslint@4.1.8
 */

const aparse = require('acorn').parse;
const eslint = require('eslint');

function parse(src) {
    return aparse(src, {
        ecmaVersion: 6,
        allowHashBang: true,
    });
}

function lint() {
    const fs = require('fs');

    const config = {
        extends: 'eslint:recommended',
        parser: 'babel-eslint',
        parserOptions: {
            ecmaFeatures: {
                ecmaVersion: 6,
            },
        },
        env: {
            node: true,
        },
        rules: {
            'no-console': 1,
        },
    };

    const linter = new eslint.CLIEngine(config);
    const formatter = eslint.CLIEngine.getFormatter('stylish');

    const file = __filename;
    const res = linter.executeOnText(String(fs.readFileSync(file)), file);

    console.log(formatter(res.results, config));
}

try {
    aparse('foo bar');
} catch (e) {
    console.dir(e);
}

lint();

try {
    aparse('foo bar');
} catch (e) {
    console.dir(e); // OK!
}

eslint-acorn2.7.js

'use strict';

/*
 * syntax-error erroed after eslint executed.
 * 
 * acorn@2.7.0
 * eslint@2.0.0
 */

const aparse = require('acorn').parse;
const eslint = require('eslint');

function parse(src) {
    return aparse(src, {
        ecmaVersion: 6,
        allowHashBang: true,
    });
}

function lint() {
    const fs = require('fs');

    const config = {
        extends: 'eslint:recommended',
        parserOptions: {
            ecmaFeatures: {
                ecmaVersion: 6,
            },
        },
        env: {
            node: true,
        },
        rules: {
            'no-console': 1,
        },
    };

    const linter = new eslint.CLIEngine(config);
    const formatter = eslint.CLIEngine.getFormatter('stylish');

    const file = __filename;
    const res = linter.executeOnText(String(fs.readFileSync(file)), file);

    console.log(formatter(res.results, config));
}

try {
    aparse('foo bar');
} catch (e) {
    console.dir(e); // { [SyntaxError: Unexpected token (1:4)] pos: 4, loc: Position { line: 1, column: 4 }, raisedAt: 7 }
}

lint();

try {
    aparse('foo bar');
} catch (e) {
    console.dir(e); // [TypeError: Cannot read property '1' of undefined]
}

eslint-syntax-error.js

'use strict';

/*
 * syntax-error erroed after eslint executed.
 * 
 * eslint@2.0.0
 * syntax-error@1.1.5
 */

const syntaxError = require('syntax-error');
const eslint = require('eslint');

function lint() {
    const fs = require('fs');

    const config = {
        extends: 'eslint:recommended',
        parserOptions: {
            ecmaFeatures: {
                ecmaVersion: 6,
            },
        },
        env: {
            node: true,
        },
        rules: {
            'no-console': 1,
        },
    };

    const linter = new eslint.CLIEngine(config);
    const formatter = eslint.CLIEngine.getFormatter('stylish');

    const file = __filename;
    const res = linter.executeOnText(String(fs.readFileSync(file)), file);

    console.log(formatter(res.results, config));
}

console.log(syntaxError('foo bar'));
console.log(syntaxError('foo bar'));

lint();

console.log(syntaxError('foo bar')); // TypeError

espree-acron.js

'use strict';

/*
 * syntax-error erroed after espree included.
 * 
 * acorn@2.7.0
 * espree@3.0.1
 */

const aparse = require('acorn').parse;
function parse(src) {
    return aparse(src, {
        ecmaVersion: 6,
        allowHashBang: true,
    });
}

try {
    aparse('foo bar');
} catch (e) {
    console.dir(e); // { [SyntaxError: Unexpected token (1:4)] pos: 4, loc: Position { line: 1, column: 4 }, raisedAt: 7 }
}

require('espree');

try {
    aparse('foo bar');
} catch (e) {
    console.dir(e); // [TypeError: Cannot read property 'ecmaFeatures' of undefined]
}