Silently wrong code generated for enums in templated classes

Input C/C++ Header

template <typename T>
class Test {
  enum class Enum { One, Two };
};

Bindgen Invocation

Tested both with the current release and current main:

$ bindgen input.h -- -x c++ -std=c++11

Actual Results

/* automatically generated by rust-bindgen 0.69.4 */

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct Test {
    pub _address: u8,
}
pub const Test_Enum_One: Test_Enum = 0;
pub const Test_Enum_Two: Test_Enum = 0;
pub type Test_Enum = ::std::os::raw::c_int;

Expected Results

I would expect to see the same enum generated as for a non-templated class. Removing the first line of input.h results in this generated code:

/* automatically generated by rust-bindgen 0.69.4 */

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct Test {
    pub _address: u8,
}
pub const Test_Enum_One: Test_Enum = 0;
pub const Test_Enum_Two: Test_Enum = 1;
pub type Test_Enum = ::std::os::raw::c_int;
#[test]
fn bindgen_test_layout_Test() {
    assert_eq!(
        ::std::mem::size_of::<Test>(),
        1usize,
        concat!("Size of: ", stringify!(Test))
    );
    assert_eq!(
        ::std::mem::align_of::<Test>(),
        1usize,
        concat!("Alignment of ", stringify!(Test))
    );
}

Reproduce the issue with input.h using the shown bindgen invocation, comparing the templated and non-templated class outputs. Trace how the C++ enum values are handled during generation, and consider the issue resolved when Test_Enum_Two is generated as 1 rather than 0 in the templated case.