clang-4.0: warning: treating 'c-header' input as 'c++-header' when in C++ mode, this behavior is deprecated [-Wdeprecated]
abc.h:6:19: warning: unknown attribute 'size' ignored [-Wunknown-attributes]
} __attribute__ ((size, packed));
 ^
1 warning generated.
abc.h:6:19: warning: unknown attribute 'size' ignored [-Wunknown-attributes], err: false
running 1 test
test bindgen_test_layout_header ... FAILED
failures:
---- bindgen_test_layout_header stdout ----
 thread 'bindgen_test_layout_header' panicked at 'assertion failed: `(left == right)`
 left: `5`,
 right: `8`: Size of: header', /tmp/bindings-hJzMPE.rs:46:4
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
stack backtrace:
 0: std::sys::imp::backtrace::tracing::imp::unwind_backtrace
 at /checkout/src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
 1: std::sys_common::backtrace::_print
 at /checkout/src/libstd/sys_common/backtrace.rs:71
 2: std::panicking::default_hook::{{closure}}
 at /checkout/src/libstd/sys_common/backtrace.rs:60
 at /checkout/src/libstd/panicking.rs:380
 3: std::panicking::default_hook
 at /checkout/src/libstd/panicking.rs:390
 4: std::panicking::rust_panic_with_hook
 at /checkout/src/libstd/panicking.rs:611
 5: std::panicking::begin_panic_new
 at /checkout/src/libstd/panicking.rs:553
 6: std::panicking::begin_panic_fmt
 at /checkout/src/libstd/panicking.rs:521
 7: bindings_hJzMPE::bindgen_test_layout_header
 8: <F as test::FnBox<T>>::call_box
 at /checkout/src/libtest/lib.rs:1477
 at /checkout/src/libcore/ops/function.rs:143
 at /checkout/src/libtest/lib.rs:138
 9: __rust_maybe_catch_panic
 at /checkout/src/libpanic_unwind/lib.rs:98
failures:
 bindgen_test_layout_header
test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
Interesting: bindgen emitted type definitions that are failing their
layout unit tests!

struct header
{
 char proto;
 unsigned int size __attribute__ ((packed));
 unsigned char data[] __attribute__ ((aligned (8)));
} __attribute__ ((size, packed));