SIGSEGV running rust-bindgen on Objective-C headers

Input C/C++ Objective-C Header

#import <Foundation/Foundation.h>
#import <NSWindow.h>
#import <NSTableView.h>

Bindgen Invocation

    let sdk_root = "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk";

    let bindings = bindgen::Builder::default()
        .no_unstable_rust()
        .objc_extern_crate(true)
        .clang_arg("-x")
        .clang_arg("objective-c")
        .clang_arg(format!("-isysroot{}", sdk_root))
        .clang_arg("-mmacosx-version-min=10.10")
        .header("src/wrapper.h")
        .generate()
        .expect("Unable to generate bindings");

Invoked via cargo build with RUST_LOG=libbindgen and RUST_BACKTRACE=1.

Actual Results

oluseyi@Metroplex ~/S/cocoabind-rs> env RUST_LOG=libbindgen RUST_BACKTRACE=1 cargo build
   Compiling cocoabind-rs v0.1.0 (file:///Users/oluseyi/Source/cocoabind-rs)
error: failed to run custom build command for `cocoabind-rs v0.1.0 (file:///Users/oluseyi/Source/cocoabind-rs)`
process didn't exit successfully: `/Users/oluseyi/Source/cocoabind-rs/target/debug/build/cocoabind-rs-b444d464ed631d7a/build-script-build` (signal: 11, SIGSEGV: invalid memory reference)

Note: No stack trace generated!

Expected Results

At this point, simply successful execution without segfault and generation of bindings, even if incorrect.

Start by reproducing the failure with the shown Objective-C imports, bindgen invocation, and cargo build environment using RUST_LOG=libbindgen and RUST_BACKTRACE=1. Investigate the crash while processing src/wrapper.h and the referenced macOS SDK headers; done means cargo build completes without SIGSEGV and generates bindings.