[INFO] cloning repository https://github.com/hairtail/ironfish-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hairtail/ironfish-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhairtail%2Fironfish-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhairtail%2Fironfish-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f19cba4aa6048e671a9dbb4a8b1ee1b5b2273dd4
[INFO] checking hairtail/ironfish-rust/f19cba4aa6048e671a9dbb4a8b1ee1b5b2273dd4 against master#5518eaa946291f00471af8b254b2a1715f234882 for pr-120393
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhairtail%2Fironfish-rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hairtail/ironfish-rust on toolchain 5518eaa946291f00471af8b254b2a1715f234882
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hairtail/ironfish-rust
[INFO] finished tweaking git repo https://github.com/hairtail/ironfish-rust
[INFO] tweaked toml for git repo https://github.com/hairtail/ironfish-rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hairtail/ironfish-rust 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" "+5518eaa946291f00471af8b254b2a1715f234882" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/hairtail/ironfish-zkp`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pairing v0.22.0
[INFO] [stderr]   Downloaded memuse v0.2.1
[INFO] [stderr]   Downloaded block-modes v0.8.1
[INFO] [stderr]   Downloaded zcash_note_encryption v0.1.0
[INFO] [stderr]   Downloaded serde_derive v1.0.154
[INFO] [stderr]   Downloaded jubjub v0.9.0
[INFO] [stderr]   Downloaded bellman v0.13.1
[INFO] [stderr]   Downloaded ff v0.12.1
[INFO] [stderr]   Downloaded zcash_primitives v0.7.0
[INFO] [stderr]   Downloaded halo2_proofs v0.2.0
[INFO] [stderr]   Downloaded pbkdf2 v0.9.0
[INFO] [stderr]   Downloaded redjubjub v0.5.0
[INFO] [stderr]   Downloaded reddsa v0.3.0
[INFO] [stderr]   Downloaded bls12_381 v0.7.1
[INFO] [stderr]   Downloaded halo2_gadgets v0.2.0
[INFO] [stderr]   Downloaded orchard v0.2.0
[INFO] [stderr]   Downloaded zcash_encoding v0.1.0
[INFO] [stderr]   Downloaded nonempty v0.7.0
[INFO] [stderr]   Downloaded constant_time_eq v0.2.4
[INFO] [stderr]   Downloaded base64ct v1.0.1
[INFO] [stderr]   Downloaded blake2s_simd v1.0.1
[INFO] [stderr]   Downloaded x25519-dalek v1.2.0
[INFO] [stderr]   Downloaded group v0.12.1
[INFO] [stderr]   Downloaded bip0039 v0.9.0
[INFO] [stderr]   Downloaded pasta_curves v0.4.1
[INFO] [stderr]   Downloaded blake2b_simd v1.0.1
[INFO] [stderr]   Downloaded fpe v0.5.1
[INFO] [stderr]   Downloaded equihash v0.2.0
[INFO] [stderr]   Downloaded zeroize_derive v1.3.3
[INFO] [stderr]   Downloaded serde v1.0.154
[INFO] [stderr]   Downloaded crypto_box v0.7.2
[INFO] [stderr]   Downloaded zcash_proofs v0.7.1
[INFO] [stderr]   Downloaded password-hash v0.3.2
[INFO] [stderr]   Downloaded uint v0.9.5
[INFO] [stderr]   Downloaded incrementalmerkletree v0.3.1
[INFO] [stderr]   Downloaded xsalsa20poly1305 v0.8.0
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff0c330bcf7d8139ed11147ace21d13779e027e41f37d45551204dd24bb2d91d
[INFO] running `Command { std: "docker" "start" "-a" "ff0c330bcf7d8139ed11147ace21d13779e027e41f37d45551204dd24bb2d91d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff0c330bcf7d8139ed11147ace21d13779e027e41f37d45551204dd24bb2d91d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff0c330bcf7d8139ed11147ace21d13779e027e41f37d45551204dd24bb2d91d", kill_on_drop: false }`
[INFO] [stdout] ff0c330bcf7d8139ed11147ace21d13779e027e41f37d45551204dd24bb2d91d
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 46380ba169db74455d15a6a1d3c199d34303be2c5a17d5a73853771e8b98d79b
[INFO] running `Command { std: "docker" "start" "-a" "46380ba169db74455d15a6a1d3c199d34303be2c5a17d5a73853771e8b98d79b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking cpufeatures v0.2.5
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.51/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking constant_time_eq v0.2.4
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "46380ba169db74455d15a6a1d3c199d34303be2c5a17d5a73853771e8b98d79b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46380ba169db74455d15a6a1d3c199d34303be2c5a17d5a73853771e8b98d79b", kill_on_drop: false }`
[INFO] [stdout] 46380ba169db74455d15a6a1d3c199d34303be2c5a17d5a73853771e8b98d79b