The deprecated attribute of alias statements is beeing ignored.
This code compiles without warning:
# int a;
# deprecated alias a b;
# int c = b;

test cases: svn://svn.kuehne.cn/dstress/nocompile/deprecated_11.d svn://svn.kuehne.cn/dstress/run/deprecated_12.d svn://svn.kuehne.cn/dstress/run/deprecated_13.d

Thomas