To reproduce, do following:
1. touch noRead.class
2. chmod 0 noRead.class
3. create test.java as following:
     import noRead;
     public class test { noRead var; }
4. javac test.java

it will say forever:
error: I/O error in .//noRead.class
error: I/O error in .//noRead.class
error: I/O error in .//noRead.class
error: I/O error in .//noRead.class
........