build fails with (signal: 11, SIGSEGV: invalid memory reference)

[parniere]

Hi,

I try to build the user guide's project, but unfortunately I encounter a SIGSEV while building

$ git clone https://github.com/fitzgen/bindgen-tutorial-bzip2-sys

$ cargo -V
cargo 1.32.0 (8610973aa 2019-01-02)

$ cargo build

error: failed to run custom build command for bindgen-tutorial-bzip2-sys v0.1.0 (/home/opa/DEV/rust/bindgen-tutorial-bzip2-sys)
process didn't exit successfully: /home/opa/DEV/rust/bindgen-tutorial-bzip2-sys/target/debug/build/bindgen-tutorial-bzip2-sys-85aebf905d83cf47/build-script-build (signal: 11, SIGSEGV: invalid memory reference)

I attached gdb backtrace:
gdb.txt

It seems that the crash is located in LLVM.

Here is the version of clang I use :

$ clang -v
clang version 7.0.1 (Fedora 7.0.1-1.fc29)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/8
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/8
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64

Regards

Olivier

[emilio]

I assume that's using bindgen 0.47.0? Can you repro with 0.46.0 if so? It might be a regression from the recent clang-sys update.

[emilio]

I just tested and couldn't repro. You can downgrade bindgen in that project like so:

$ cargo update -p bindgen --precise 0.46.0                                                                                                                                                                      
    Updating crates.io index
    Updating bindgen v0.47.0 -> v0.46.0
    Updating clang-sys v0.27.0 -> v0.26.4

[parniere]

Indeed downgrading bindgen from 0.47.0 to 0.46.0 corrects the issue.
Thanks

[emilio]

cc @KyleMayes, seems another regression from #1489.