[INFO] cloning repository https://github.com/Amanita19/mpp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Amanita19/mpp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmanita19%2Fmpp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmanita19%2Fmpp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2be006b2985205a0d6eba07671658bb3ae6114a1
[INFO] checking Amanita19/mpp against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmanita19%2Fmpp" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Amanita19/mpp
[INFO] finished tweaking git repo https://github.com/Amanita19/mpp
[INFO] tweaked toml for git repo https://github.com/Amanita19/mpp written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Amanita19/mpp on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Amanita19/mpp already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/hkailad/callbacks`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ark-snark v0.4.0
[INFO] [stderr]   Downloaded ark-groth16 v0.4.0
[INFO] [stderr]   Downloaded ark-relations v0.4.0
[INFO] [stderr]   Downloaded platforms v3.4.0
[INFO] [stderr]   Downloaded getrandom v0.2.14
[INFO] [stderr]   Downloaded ark-crypto-primitives v0.4.0
[INFO] [stderr]   Downloaded serde_derive v1.0.202
[INFO] [stderr]   Downloaded serde v1.0.202
[INFO] [stderr]   Downloaded ark-r1cs-std v0.4.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.82
[INFO] [stderr]   Downloaded syn v2.0.64
[INFO] [stderr]   Downloaded curve25519-dalek v4.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab418469cd16ea0e4e7cff63e04227e6f5735b73a0d22d583338b7835b805615
[INFO] running `Command { std: "docker" "start" "-a" "ab418469cd16ea0e4e7cff63e04227e6f5735b73a0d22d583338b7835b805615", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab418469cd16ea0e4e7cff63e04227e6f5735b73a0d22d583338b7835b805615", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab418469cd16ea0e4e7cff63e04227e6f5735b73a0d22d583338b7835b805615", kill_on_drop: false }`
[INFO] [stdout] ab418469cd16ea0e4e7cff63e04227e6f5735b73a0d22d583338b7835b805615
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81353f424b4a87e5c38d1c3f3c44d7d8e1a508d4a775ec90419400eeed4d0e41
[INFO] running `Command { std: "docker" "start" "-a" "81353f424b4a87e5c38d1c3f3c44d7d8e1a508d4a775ec90419400eeed4d0e41", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.82
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]     Checking either v1.12.0
[INFO] [stderr]     Checking zerocopy v0.7.34
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling semver v1.0.23
[INFO] [stderr]     Checking cpufeatures v0.2.12
[INFO] [stderr]    Compiling platforms v3.4.0
[INFO] [stderr]     Checking generic-array v0.14.7
[INFO] [stderr]     Checking signature v2.2.0
[INFO] [stderr]     Checking ed25519 v2.2.3
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking hashbrown v0.13.2
[INFO] [stderr]    Compiling curve25519-dalek v4.1.2
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking blake2 v0.10.6
[INFO] [stderr]    Compiling syn v2.0.64
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]     Checking getrandom v0.2.14
[INFO] [stderr]     Checking rayon-core v1.12.1
[INFO] [stderr]     Checking num-bigint v0.4.5
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking ark-std v0.4.0
[INFO] [stderr]    Compiling ark-serialize-derive v0.4.2
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling ark-ff-asm v0.4.2
[INFO] [stderr]    Compiling ark-ff-macros v0.4.2
[INFO] [stderr]     Checking ark-serialize v0.4.2
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling curve25519-dalek-derive v0.1.1
[INFO] [stderr]    Compiling zk-object v0.1.0 (https://github.com/hkailad/callbacks#59117338)
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]     Checking ark-ff v0.4.2
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking ed25519-dalek v2.1.1
[INFO] [stderr]     Checking ark-poly v0.4.2
[INFO] [stderr]     Checking ark-relations v0.4.0
[INFO] [stderr]     Checking ark-snark v0.4.0
[INFO] [stderr]     Checking ark-ec v0.4.2
[INFO] [stderr]     Checking ark-r1cs-std v0.4.0
[INFO] [stderr]     Checking ark-bn254 v0.4.0
[INFO] [stderr]     Checking ark-bls12-381 v0.4.0
[INFO] [stderr]     Checking ark-crypto-primitives v0.4.0
[INFO] [stderr]     Checking ark-groth16 v0.4.0
[INFO] [stderr]     Checking zk-callbacks v0.1.0 (https://github.com/hkailad/callbacks#59117338)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/callbacks-c45ce7a324264734/5911733/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(associated_type_defaults)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zk-callbacks` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "81353f424b4a87e5c38d1c3f3c44d7d8e1a508d4a775ec90419400eeed4d0e41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81353f424b4a87e5c38d1c3f3c44d7d8e1a508d4a775ec90419400eeed4d0e41", kill_on_drop: false }`
[INFO] [stdout] 81353f424b4a87e5c38d1c3f3c44d7d8e1a508d4a775ec90419400eeed4d0e41