[INFO] cloning repository https://github.com/jimpo/gadgets
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jimpo/gadgets" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjimpo%2Fgadgets", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjimpo%2Fgadgets'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6d2211afbc5b249f169364bb4582c7653930e4c
[INFO] checking jimpo/gadgets against try#b20a093d9fb1ffaa04ae9852cb034864a992bafd for pr-85073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjimpo%2Fgadgets" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jimpo/gadgets on toolchain b20a093d9fb1ffaa04ae9852cb034864a992bafd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jimpo/gadgets
[INFO] finished tweaking git repo https://github.com/jimpo/gadgets
[INFO] tweaked toml for git repo https://github.com/jimpo/gadgets written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/jimpo/gadgets already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/jimpo/bulletproofs`
[INFO] [stderr]     Updating git repository `https://github.com/zcash/librustzcash`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded itertools v0.8.1
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[INFO] [stderr]   Downloaded subtle v2.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1402f52a85349852b1c922fcbeed827b8b00e2e74a72d3406174434f3d2c12f5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1402f52a85349852b1c922fcbeed827b8b00e2e74a72d3406174434f3d2c12f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1402f52a85349852b1c922fcbeed827b8b00e2e74a72d3406174434f3d2c12f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1402f52a85349852b1c922fcbeed827b8b00e2e74a72d3406174434f3d2c12f5", kill_on_drop: false }`
[INFO] [stdout] 1402f52a85349852b1c922fcbeed827b8b00e2e74a72d3406174434f3d2c12f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4079946470bd4504ada84e9eab68237d420d63d15b40deb7c72f8d4335d8ea17
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4079946470bd4504ada84e9eab68237d420d63d15b40deb7c72f8d4335d8ea17", kill_on_drop: false }`
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[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking cast v0.2.2
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[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]    Compiling curve25519-dalek v1.2.3
[INFO] [stderr]     Checking tinytemplate v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling ff_derive v0.4.0 (https://github.com/zcash/librustzcash#8d7f27ff)
[INFO] [stderr]     Checking ring-signatures v0.1.0 (/opt/rustwide/workdir/ring-signatures)
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking ff v0.5.0 (https://github.com/zcash/librustzcash#8d7f27ff)
[INFO] [stderr]     Checking group v0.2.0 (https://github.com/zcash/librustzcash#8d7f27ff)
[INFO] [stderr]     Checking pairing v0.15.0 (https://github.com/zcash/librustzcash#8d7f27ff)
[INFO] [stderr]     Checking group-signatures v0.1.0 (/opt/rustwide/workdir/group-signatures)
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]   --> group-signatures/src/lib.rs:63:20
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let x = E::Fr::rand(rng);
[INFO] [stdout]    |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]   --> group-signatures/src/lib.rs:64:20
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let y = E::Fr::rand(rng);
[INFO] [stdout]    |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]   --> group-signatures/src/lib.rs:63:20
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let x = E::Fr::rand(rng);
[INFO] [stdout]    |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]   --> group-signatures/src/lib.rs:65:20
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let t = E::Fr::rand(rng);
[INFO] [stdout]    |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]   --> group-signatures/src/lib.rs:64:20
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let y = E::Fr::rand(rng);
[INFO] [stdout]    |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]   --> group-signatures/src/lib.rs:65:20
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let t = E::Fr::rand(rng);
[INFO] [stdout]    |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]   --> group-signatures/src/lib.rs:94:20
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let h = E::Fr::rand(rng);
[INFO] [stdout]    |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]   --> group-signatures/src/lib.rs:94:20
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let h = E::Fr::rand(rng);
[INFO] [stdout]    |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:161:20
[INFO] [stdout]     |
[INFO] [stdout] 161 |     let u = E::Fr::rand(rng);
[INFO] [stdout]     |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:162:20
[INFO] [stdout]     |
[INFO] [stdout] 162 |     let v = E::Fr::rand(rng);
[INFO] [stdout]     |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:163:20
[INFO] [stdout]     |
[INFO] [stdout] 163 |     let k = E::Fr::rand(rng);
[INFO] [stdout]     |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:161:20
[INFO] [stdout]     |
[INFO] [stdout] 161 |     let u = E::Fr::rand(rng);
[INFO] [stdout]     |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:162:20
[INFO] [stdout]     |
[INFO] [stdout] 162 |     let v = E::Fr::rand(rng);
[INFO] [stdout]     |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:184:22
[INFO] [stdout]     |
[INFO] [stdout] 184 |     let r_v = E::Fr::rand(rng);
[INFO] [stdout]     |                      ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:163:20
[INFO] [stdout]     |
[INFO] [stdout] 163 |     let k = E::Fr::rand(rng);
[INFO] [stdout]     |                    ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:185:22
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let r_k = E::Fr::rand(rng);
[INFO] [stdout]     |                      ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:186:22
[INFO] [stdout]     |
[INFO] [stdout] 186 |     let r_m = E::Fr::rand(rng);
[INFO] [stdout]     |                      ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:184:22
[INFO] [stdout]     |
[INFO] [stdout] 184 |     let r_v = E::Fr::rand(rng);
[INFO] [stdout]     |                      ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:185:22
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let r_k = E::Fr::rand(rng);
[INFO] [stdout]     |                      ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for associated type `<E as ScalarEngine>::Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:186:22
[INFO] [stdout]     |
[INFO] [stdout] 186 |     let r_m = E::Fr::rand(rng);
[INFO] [stdout]     |                      ^^^^ function or associated item not found in `<E as ScalarEngine>::Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rand`
[INFO] [stdout]  --> group-signatures/src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rand::{Rand, Rng};
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 10 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `rand` found for struct `Fr` in the current scope
[INFO] [stdout]    --> group-signatures/src/lib.rs:370:21
[INFO] [stdout]     |
[INFO] [stdout] 370 |         let m = Fr::rand(&mut rng);
[INFO] [stdout]     |                     ^^^^ function or associated item not found in `Fr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rand`
[INFO] [stdout]  --> group-signatures/src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rand::{Rand, Rng};
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 11 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `group-signatures`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4079946470bd4504ada84e9eab68237d420d63d15b40deb7c72f8d4335d8ea17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4079946470bd4504ada84e9eab68237d420d63d15b40deb7c72f8d4335d8ea17", kill_on_drop: false }`
[INFO] [stdout] 4079946470bd4504ada84e9eab68237d420d63d15b40deb7c72f8d4335d8ea17