unexpected warning about unused variables from anonymous union with a template member

[Steve Ward]

See the attached program.

Command:
g++ -Wunused anonymous_union.cpp

Output:
anonymous_union.cpp: In function 'void print_byte_array_2(T) [with T =
unsigned int]':
anonymous_union.cpp:95:   instantiated from here
anonymous_union.cpp:38: warning: unused variable 'y'
anonymous_union.cpp:38: warning: unused variable 'byte_array'

Expected output:
none


The four functions do the same thing.  Two use template parameters,
and the other two use non-template parameters.  Two use anonymous
unions, and the other two use named unions.

Warnings about unused variables are printed for the second function
(with a template parameter and anonymous union) but not for the other
three.

g++ --version
g++ (Ubuntu 4.4.1-4ubuntu8) 4.4.1


Steve
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