bindgen_test_layout_max_align_t ... FAILED

[Dushistov]

Input C/C++ Header

// Define 'max_align_t' to match the GCC definition.
typedef struct {
  long long __clang_max_align_nonce1
      __attribute__((__aligned__(__alignof__(long long))));
  long double __clang_max_align_nonce2
      __attribute__((__aligned__(__alignof__(long double))));
} max_align_t;

I take it from llvm/clang header.

Bindgen Invokation

$ bindgen --no-unstable-rust test.h 

Actual Results

#[repr(C)]
#[derive(Debug, Copy)]
pub struct max_align_t {
    pub __clang_max_align_nonce1: ::std::os::raw::c_longlong,
    pub __bindgen_padding_0: u64,
    pub __clang_max_align_nonce2: f64,
}

test gen_c::bindgen_test_layout_max_align_t ... FAILED

failures:

---- gen_c::bindgen_test_layout_max_align_t stdout ----
        thread 'gen_c::bindgen_test_layout_max_align_t' panicked at 'assertion failed: `(left == right)` (left: `24`, right: `32`): Size of: max_align_t', gen_c.rs:12
note: Run with `RUST_BACKTRACE=1` for a backtrace.


failures:
    gen_c::bindgen_test_layout_max_align_t

test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured

Expected Results

All generated tests should be "green".

$ bindgen --version
bindgen 0.22.1

I also tried 1320efe, but it also generate failed test.

[emilio]

Right, this is a dupe of #550. See there for workarounds. Thanks for reporting!

[philn]

The link is 404 though. I'm also getting this issue :/

[traviscross]

The correct link is now: #550

The underlying issue was apparently fixed. However, the fix relies on the final build being done with a recent version of rustc, so we need to promise bindgen that we'll use such a version. E.g.:

Builder::default()
  .rust_target(bindgen::RustTarget::Stable_1_28)