Compilation failure

[sergey-melnychuk]

When I try building as described in README I get a failed compilation likely caused by patches not being applied (see the warnings & the error message in the comment below).

---

$ rustup show
...
active toolchain
----------------

stable-aarch64-apple-darwin (default)
rustc 1.85.0 (4d91de4e4 2025-02-17)

[sergey-melnychuk]

$ git clone https://github.com/arkworks-rs/groth16.git
cd groth16
cargo build --release

Cloning into 'groth16'...
remote: Enumerating objects: 846, done.
remote: Counting objects: 100% (168/168), done.
remote: Compressing objects: 100% (69/69), done.
remote: Total 846 (delta 145), reused 99 (delta 99), pack-reused 678 (from 2)
Receiving objects: 100% (846/846), 211.88 KiB | 2.94 MiB/s, done.
Resolving deltas: 100% (503/503), done.
    Updating git repository `https://github.com/arkworks-rs/algebra/`
    Updating git repository `https://github.com/arkworks-rs/crypto-primitives/`
    Updating git repository `https://github.com/arkworks-rs/r1cs-std/`
    Updating git repository `https://github.com/arkworks-rs/snark/`
    Updating git repository `https://github.com/arkworks-rs/std/`
    Updating crates.io index
warning: Patch `ark-bls12-377 v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-bls12-381 v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-bn254 v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-bw6-761 v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-ec v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-ff v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-mnt4-298 v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-mnt4-753 v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-mnt6-298 v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-mnt6-753 v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-poly v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-r1cs-std v0.5.0 (https://github.com/arkworks-rs/r1cs-std/#c8c51a39)` was not used in the crate graph.
Patch `ark-relations v0.5.1 (https://github.com/arkworks-rs/snark/#f6327703)` was not used in the crate graph.
Patch `ark-serialize v0.5.0 (https://github.com/arkworks-rs/algebra/#621be87b)` was not used in the crate graph.
Patch `ark-snark v0.5.1 (https://github.com/arkworks-rs/snark/#f6327703)` was not used in the crate graph.
Patch `ark-std v0.5.0 (https://github.com/arkworks-rs/std/#b0cbdeb0)` was not used in the crate graph.
Check that the patched package version and available features are compatible
with the dependency requirements. If the patch has a different version from
what is locked in the Cargo.lock file, run `cargo update` to use the new
version. This may also occur with an optional dependency that is not enabled.
     Locking 93 packages to latest compatible versions
      Adding ark-bls12-377 v0.4.0 (available: v0.5.0)
      Adding ark-bls12-381 v0.4.0 (available: v0.5.0)
      Adding ark-bn254 v0.4.0 (available: v0.5.0)
      Adding ark-bw6-761 v0.4.0 (available: v0.5.0)
      Adding ark-ec v0.4.2 (available: v0.5.0)
      Adding ark-ff v0.4.2 (available: v0.5.0)
      Adding ark-mnt4-298 v0.4.0 (available: v0.5.0)
      Adding ark-mnt4-753 v0.4.0 (available: v0.5.0)
      Adding ark-mnt6-298 v0.4.0 (available: v0.5.0)
      Adding ark-mnt6-753 v0.4.0 (available: v0.5.0)
      Adding ark-poly v0.4.2 (available: v0.5.0)
      Adding ark-r1cs-std v0.4.0 (available: v0.5.0)
      Adding ark-relations v0.4.0 (available: v0.5.1)
      Adding ark-serialize v0.4.2 (available: v0.5.0)
      Adding ark-std v0.4.0 (available: v0.5.0)
   Compiling proc-macro2 v1.0.93
   Compiling unicode-ident v1.0.17
   Compiling version_check v0.9.5
   Compiling autocfg v1.4.0
   Compiling typenum v1.18.0
   Compiling byteorder v1.5.0
   Compiling crossbeam-utils v0.8.21
   Compiling syn v1.0.109
   Compiling rand_core v0.6.4
   Compiling rayon-core v1.12.1
   Compiling generic-array v0.14.7
   Compiling subtle v2.6.1
   Compiling once_cell v1.20.3
   Compiling num-traits v0.2.19
   Compiling either v1.14.0
   Compiling paste v1.0.15
   Compiling libc v0.2.170
   Compiling crossbeam-epoch v0.9.18
   Compiling quote v1.0.38
   Compiling syn v2.0.98
   Compiling crossbeam-deque v0.8.6
   Compiling itertools v0.10.5
   Compiling num-integer v0.1.46
   Compiling rayon v1.10.0
   Compiling block-buffer v0.10.4
   Compiling crypto-common v0.1.6
   Compiling num-bigint v0.4.6
   Compiling digest v0.10.7
   Compiling ahash v0.8.11
   Compiling cfg-if v1.0.0
   Compiling tracing-core v0.1.33
   Compiling cpufeatures v0.2.17
   Compiling pin-project-lite v0.2.16
   Compiling keccak v0.1.5
   Compiling sha2 v0.10.8
   Compiling tracing v0.1.41
   Compiling tracing-subscriber v0.2.25
   Compiling blake2 v0.10.6
   Compiling ark-serialize-derive v0.4.2
   Compiling ark-ff-macros v0.4.2
   Compiling derivative v2.2.0
   Compiling ark-ff-asm v0.4.2
   Compiling zerocopy-derive v0.7.35
   Compiling zeroize_derive v1.4.2
   Compiling ark-crypto-primitives-macros v0.4.0 (https://github.com/arkworks-rs/crypto-primitives/#b1398381)
   Compiling zeroize v1.8.1
   Compiling zerocopy v0.7.35
   Compiling merlin v3.0.0
   Compiling ppv-lite86 v0.2.20
   Compiling hashbrown v0.13.2
   Compiling rand_chacha v0.3.1
   Compiling rand v0.8.5
   Compiling ark-std v0.4.0
   Compiling ark-serialize v0.4.2
   Compiling ark-ff v0.4.2
   Compiling ark-relations v0.4.0
   Compiling ark-poly v0.4.2
   Compiling ark-snark v0.4.0
   Compiling ark-ec v0.4.2
   Compiling ark-crypto-primitives v0.4.0 (https://github.com/arkworks-rs/crypto-primitives/#b1398381)
   Compiling ark-groth16 v0.4.0 (/Users/owner/Temp/tmp/groth16)
error[E0432]: unresolved import `ark_ec::scalar_mul::BatchMulPreprocessing`
 --> src/generator.rs:2:32
  |
2 | use ark_ec::{pairing::Pairing, scalar_mul::BatchMulPreprocessing, CurveGroup};
  |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `BatchMulPreprocessing` in `scalar_mul`

For more information about this error, try `rustc --explain E0432`.
error: could not compile `ark-groth16` (lib) due to 1 previous error