Inconsistency in -Wconversion

[Claus Fischer]

Just FYI:

One would expect the compiler to give the same kind of warnings
for both function calls in the following program, but it warns
only for the call where the argument is instantiated with the
array member. It probably shouldn't warn at all.

Claus

************************************************

cat <<EOF >x.c
    typedef enum { a } __attribute__((packed)) t;
    void f(t x) {}
    int main(void)
    {
    	t x[2], y;
    	f(x[0]);
    	f(y);
    	return 0;
    }
EOF
gcc -o x x.c -Wconversion

************************************************

x.c: In function `main':
x.c:6: warning: passing arg 1 of `f' with different width due to prototype

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