Fail to rename the field in impl debug when variable name conflicts with Rust

[photoszzt]

Input C/C++ Header

struct test {
    unsigned int type;

    float a;
    union {
        int b;
        int c;
    };
};

Bindgen Invocation

$ bindgen --no-rustfmt-bindings --with-derive-default --impl-debug -o tests.rs headers/test.h

Actual Results

The translation of struct is correct:

 #[repr(C)]
 #[derive(Copy, Clone)]
 pub struct perf_event_attr {
     pub type_: ::std::os::raw::c_uint,
     pub a: f32,
     pub __bindgen_anon_1: perf_event_attr__bindgen_ty_1,
 }

But the impl Debug is wrong

impl ::std::fmt::Debug for perf_event_attr {
     fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
         write ! ( f , "perf_event_attr {{ type: {:?}, a: {:?}, __bindgen_anon_1: {:?} }}" , self . type , self . a , self . __bindgen_anon_1 )
     }
 }

error: expected identifier, found keyword `type`
   --> tests.rs:100:100
    |
100 |         write ! ( f , "perf_event_attr {{ type: {:?}, a: {:?}, __bindgen_anon_1: {:?} }}" , self . type , self . a , self . __bindgen_anon_1 )
    |                                                                                                    ^^^^

error: aborting due to previous error

Expected Results

Should be type_ not type.

[photoszzt]

@highfive assign me

[highfive]

Hey @photoszzt! Thanks for your interest in working on this issue. It's now assigned to you!