PHP_CodeCoverage_Exception not handled properly

[sebastianbergmann]

Actual

$ phpunit --coverage-html /does-not-exist
PHPUnit 4.8.16-1-g54ee96a by Sebastian Bergmann and contributors.

Runtime:    PHP 5.6.15 with Xdebug 2.3.3
Configuration:  /usr/local/src/money/build/phpunit.xml

.............................................

Time: 794 ms, Memory: 13.00Mb

OK (45 tests, 71 assertions)

Generating code coverage report in Clover XML format ... done

Generating Crap4J report XML file ... done

Generating code coverage report in HTML format ...PHP Fatal error:  Uncaught exception 'PHP_CodeCoverage_Exception' with message 'Directory "/does-not-exist/" does not exist.' in /usr/local/src/phpunit/vendor/phpunit/php-code-coverage/src/CodeCoverage/Report/HTML.php:175
Stack trace:
#0 /usr/local/src/phpunit/vendor/phpunit/php-code-coverage/src/CodeCoverage/Report/HTML.php(67): PHP_CodeCoverage_Report_HTML->getDirectory('/does-not-exist')
#1 /usr/local/src/phpunit/src/TextUI/TestRunner.php(488): PHP_CodeCoverage_Report_HTML->process(Object(PHP_CodeCoverage), '/does-not-exist')
#2 /usr/local/src/phpunit/src/TextUI/Command.php(149): PHPUnit_TextUI_TestRunner->doRun(Object(PHPUnit_Framework_TestSuite), Array)
#3 /usr/local/src/phpunit/src/TextUI/Command.php(100): PHPUnit_TextUI_Command->run(Array, true)
#4 /usr/local/src/phpunit/phpunit(47): PHPUnit_TextUI_Command::main()
#5 {main}
  thrown in /usr/local/src/phpunit/vendor/phpunit/php-code-coverage/src/CodeCoverage/Report/HTML.php on line 175

$ phpunit --coverage-html /does-not-exist
PHPUnit 4.8.16-1-g54ee96a by Sebastian Bergmann and contributors.

Runtime:    PHP 5.6.15 with Xdebug 2.3.3
Configuration:  /usr/local/src/money/build/phpunit.xml

.............................................

Time: 797 ms, Memory: 13.25Mb

OK (45 tests, 71 assertions)

Generating code coverage report in Clover XML format ... done

Generating Crap4J report XML file ... done

Generating code coverage report in HTML format ... failed
Directory "/does-not-exist/" does not exist.

Generating code coverage report in PHPUnit XML format ... done

Expected

$ phpunit --coverage-html /does-not-exist
PHPUnit 4.8.16-1-g54ee96a by Sebastian Bergmann and contributors.

Runtime:    PHP 5.6.15 with Xdebug 2.3.3
Configuration:  /usr/local/src/money/build/phpunit.xml

.............................................

Time: 797 ms, Memory: 13.25Mb

OK (45 tests, 71 assertions)

Generating code coverage report in Clover XML format ... done

Generating Crap4J report XML file ... done

Generating code coverage report in HTML format ... failed
Directory "/does-not-exist/" does not exist.

Generating code coverage report in PHPUnit XML format ... done

[GrahamCampbell]

I really like how you layout issues @sebastianbergmann. :)