Unable to initialize application with extensions with nightly cargo.

[peterhuene]

Steps to reproduce

1. rustup default nightly.
2. cargo install -f azure-functions-sdk.
3. cargo func new-app repro.
4. cargo func new blob -n repro --path repro.
5. cargo func run.

Expected behavior

The application starts successfully.

Actual behavior

Initializing the application fails because dotnet (used to restore the Azure Functions storage extension required for blob triggers) can't find libproc:

System.DllNotFoundException: Unable to load shared library 'libproc' or one of its dependencies. In order to help diagnose loading problems, consider setting the DYLD_PRINT_LIBRARIES environment variable: dlopen(liblibproc, 1): image not found
   at Interop.libproc.proc_pidpath(Int32 pid, Byte* buffer, UInt32 bufferSize)
   at Interop.libproc.proc_pidpath(Int32 pid)
   at System.Diagnostics.Process.ResolvePath(String filename)
   at System.Diagnostics.Process.StartCore(ProcessStartInfo startInfo)
   at System.Diagnostics.Process.Start()
   at Microsoft.DotNet.Cli.Utils.ProcessStartInfoExtensions.Execute(ProcessStartInfo startInfo)
   at Microsoft.DotNet.Tools.RestoringCommand.Execute()
   at Microsoft.DotNet.Tools.Publish.PublishCommand.Run(String[] args)
   at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, ITelemetry telemetryClient)
   at Microsoft.DotNet.Cli.Program.Main(String[] args)

Environment information (OS, versions, etc.)

Azure Functions for Rust: 0.4.1
OS: macOS 10.14

[peterhuene]

There's no problem with the same dotnet spawned from a stable cargo.

Possibly an environment issue that's causing nightly to mess with the lib path?

[peterhuene]

Sure looks like cargo is messing with DYLD environment variables:

$ diff stable nightly
3c3
< CARGO: /Users/peterhuene/.rustup/toolchains/stable-x86_64-apple-darwin/bin/cargo
---
> CARGO: /Users/peterhuene/.rustup/toolchains/nightly-x86_64-apple-darwin/bin/cargo
19c19,20
< DYLD_LIBRARY_PATH: /Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-e033b2c79a1901bc/out:/Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-e033b2c79a1901bc/out/build:/Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-e033b2c79a1901bc/out/build/third_party/boringssl/crypto:/Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-e033b2c79a1901bc/out/build/third_party/boringssl/ssl:/Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-e033b2c79a1901bc/out/build/third_party/cares/cares/lib:/Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-e033b2c79a1901bc/out/build/third_party/zlib:/Users/peterhuene/src/azure-functions-rs/target/debug/deps:/Users/peterhuene/src/azure-functions-rs/target/debug:/Users/peterhuene/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib:/Users/peterhuene/.rustup/toolchains/stable-x86_64-apple-darwin/lib:/Users/peterhuene/.rustup/toolchains/stable-x86_64-apple-darwin/lib
---
> DYLD_FALLBACK_LIBRARY_PATH: /Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-de2528deedfccd8b/out:/Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-de2528deedfccd8b/out/build:/Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-de2528deedfccd8b/out/build/third_party/boringssl/crypto:/Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-de2528deedfccd8b/out/build/third_party/boringssl/ssl:/Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-de2528deedfccd8b/out/build/third_party/cares/cares/lib:/Users/peterhuene/src/azure-functions-rs/target/debug/build/grpcio-sys-de2528deedfccd8b/out/build/third_party/zlib:/Users/peterhuene/src/azure-functions-rs/target/debug/deps:/Users/peterhuene/src/azure-functions-rs/target/debug:/Users/peterhuene/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib
> DYLD_LIBRARY_PATH: /Users/peterhuene/.rustup/toolchains/nightly-x86_64-apple-darwin/lib:/Users/peterhuene/.rustup/toolchains/nightly-x86_64-apple-darwin/lib
34c35
< RUSTUP_TOOLCHAIN: stable-x86_64-apple-darwin
---
> RUSTUP_TOOLCHAIN: nightly-x86_64-apple-darwin

[peterhuene]

Looks like this will fix it: rust-lang/cargo#6625.

[peterhuene]

Confirmed fixed with a more recently nightly.