A DESCRIPTION OF THE PROBLEM :
Throw StringIndexOutOfBoundsException when testing sun.tools.jar.Manifest.isManifestName with empty input.
This method is unavailable in jdk1.8.0_301, but it still works in jdk1.8.0_292.
You can just replace API "charAt" with "startsWith", and this exception will not appear again.
This kind of reform has happened before, please refer to https://github.com/openjdk/jdk/commit/e341e35276315a5140ddec11a7e659d57328e9a0

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
The test case:
@Test
    public void test_isManifestNam(){
        String string0 = "";
        sun.tools.jar.Manifest.isManifestName(string0);
    }

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
When the input is empty, it should return false rather than StringIndexOutOfBoundsException.
ACTUAL -
java.lang.StringIndexOutOfBoundsException: String index out of range: 0

at java.lang.String.charAt(String.java:658)
at sun.tools.jar.Manifest.isManifestName(Manifest.java:247)

---------- BEGIN SOURCE ----------
 public static boolean isManifestName(String name) {

        // remove leading /
        if (name.charAt(0) == '/') {
            name = name.substring(1, name.length());
        }
        // case insensitive
        name = name.toUpperCase();

        if (name.equals("META-INF/MANIFEST.MF")) {
            return true;
        }
        return false;
    }
---------- END SOURCE ----------

FREQUENCY : occasionally