This is windows only. That file contains a 2ndary class named 'Aux'. That is not allowed on Windows. The class should be renamed to Sux or something.

The testname is
   tools/javac/warnings/AuxiliaryClass/SelfClassWithAux.java

and the failure mode is
D:\\tools\\tl8\\langtools\\test\\tools\\javac\\warnings\\AuxiliaryClass\\SelfClassWithAux.java:42: error: error while writing Aux: D:\\tools\\tl8\\langtools\\AA_regtest.windows-i586\\JTwork\\classes\\tools\\javac\\warnings\\AuxiliaryClass\\Aux.class (Access is denied)
class Aux {
^
1 error
result: Failed. Compilation failed: Compilation failed


test result: Failed. Compilation failed: Compilation failed