Error when compiling against OTP-26

[deepankar-j]

When compiling excoding against OTP-26, I'm seeing the error The NIF version given from RUSTLER_NIF_VERSION is not supported: 2.17. Please see below for the full log.

It appears that Excoding (v0.1.5) is using rustler v0.28.0. Based on the rustler changelog, that release should include support for OTP-26, but I'm not sure why this error is happening.

I can get around this error if I force the NIF version to 2.16 via the environment variable: export RUSTLER_NIF_VERSION="2.16"

Full Log

==> excoding
Compiling 1 file (.ex)
Compiling crate excoding in release mode (native/excoding)
   Compiling memchr v2.5.0
   Compiling proc-macro2 v1.0.56
   Compiling encoding_index_tests v0.1.4
   Compiling regex-syntax v0.7.1
   Compiling quote v1.0.26
   Compiling unicode-ident v1.0.8
   Compiling void v1.0.2
   Compiling rustler v0.28.0
   Compiling heck v0.4.1
   Compiling lazy_static v1.4.0
   Compiling encoding-index-japanese v1.20141219.5
   Compiling unreachable v1.0.0
   Compiling encoding-index-singlebyte v1.20141219.5
   Compiling encoding-index-tradchinese v1.20141219.5
   Compiling encoding-index-simpchinese v1.20141219.5
   Compiling encoding-index-korean v1.20141219.5
   Compiling encoding v0.2.33
   Compiling aho-corasick v1.0.1
   Compiling syn v2.0.15
   Compiling regex v1.8.1
   Compiling rustler_sys v2.2.0
error: failed to run custom build command for `rustler_sys v2.2.0`

Caused by:
  process didn't exit successfully: `/workspace/code/hapi/_build/dev/lib/excoding/native/excoding/release/build/rustler_sys-b78e75b29c187b18/build-script-build` (exit status: 101)
  --- stderr
  thread 'main' panicked at /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustler_sys-2.2.0/build.rs:925:9:
  The NIF version given from RUSTLER_NIF_VERSION is not supported: 2.17
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...

== Compilation error in file lib/excoding.ex ==
** (RuntimeError) Rust NIF compile error (rustc exit code 101)
    (rustler 0.28.0) lib/rustler/compiler.ex:41: Rustler.Compiler.compile_crate/2
    lib/excoding.ex:39: (module)
could not compile dependency :excoding, "mix compile" failed. Errors may have been logged above. You can recompile this dependency with "mix deps.compile excoding --force", update it with "mix deps.update excoding" or clean it with "mix deps.clean excoding"