[INFO] fetching crate bigmaths 0.0.2...
[INFO] testing bigmaths-0.0.2 against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] extracting crate bigmaths 0.0.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate bigmaths 0.0.2 on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bigmaths 0.0.2
[INFO] finished tweaking crates.io crate bigmaths 0.0.2
[INFO] tweaked toml for crates.io crate bigmaths 0.0.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ea946c3d513efcd02e9558678b6e66b9cb58edaa7a68d5504441b919e5cfcaed
[INFO] running `Command { std: "docker" "start" "-a" "ea946c3d513efcd02e9558678b6e66b9cb58edaa7a68d5504441b919e5cfcaed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea946c3d513efcd02e9558678b6e66b9cb58edaa7a68d5504441b919e5cfcaed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea946c3d513efcd02e9558678b6e66b9cb58edaa7a68d5504441b919e5cfcaed", kill_on_drop: false }`
[INFO] [stdout] ea946c3d513efcd02e9558678b6e66b9cb58edaa7a68d5504441b919e5cfcaed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d649a6b0d84ae227b20e3137055f13e64cd76c65b1ed819f495138f49b8ba30a
[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" "d649a6b0d84ae227b20e3137055f13e64cd76c65b1ed819f495138f49b8ba30a", kill_on_drop: false }`
[INFO] [stderr]    Compiling bigmaths v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:189:26
[INFO] [stdout]     |
[INFO] [stdout] 189 | ...   let (mut modulus, final_carry) = limb_pairs_iter.fold((Vec::with_capacity(self.len() + 1), false), |(mut limbs, carry), (&self_limb...
[INFO] [stdout]     |            ----^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "d649a6b0d84ae227b20e3137055f13e64cd76c65b1ed819f495138f49b8ba30a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d649a6b0d84ae227b20e3137055f13e64cd76c65b1ed819f495138f49b8ba30a", kill_on_drop: false }`
[INFO] [stdout] d649a6b0d84ae227b20e3137055f13e64cd76c65b1ed819f495138f49b8ba30a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 195e5c4084e9a3e6081dc47f0d4965ce1ae30a4d71544ba6baf185f74e89c4ce
[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" "195e5c4084e9a3e6081dc47f0d4965ce1ae30a4d71544ba6baf185f74e89c4ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling bigmaths v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:189:26
[INFO] [stdout]     |
[INFO] [stdout] 189 | ...   let (mut modulus, final_carry) = limb_pairs_iter.fold((Vec::with_capacity(self.len() + 1), false), |(mut limbs, carry), (&self_limb...
[INFO] [stdout]     |            ----^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:189:26
[INFO] [stdout]     |
[INFO] [stdout] 189 | ...   let (mut modulus, final_carry) = limb_pairs_iter.fold((Vec::with_capacity(self.len() + 1), false), |(mut limbs, carry), (&self_limb...
[INFO] [stdout]     |            ----^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.28s
[INFO] running `Command { std: "docker" "inspect" "195e5c4084e9a3e6081dc47f0d4965ce1ae30a4d71544ba6baf185f74e89c4ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "195e5c4084e9a3e6081dc47f0d4965ce1ae30a4d71544ba6baf185f74e89c4ce", kill_on_drop: false }`
[INFO] [stdout] 195e5c4084e9a3e6081dc47f0d4965ce1ae30a4d71544ba6baf185f74e89c4ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b22dbb02b9d08d45d3c6a389e66e2263c13894958f5f70c2dc7b278fa6edb34d
[INFO] running `Command { std: "docker" "start" "-a" "b22dbb02b9d08d45d3c6a389e66e2263c13894958f5f70c2dc7b278fa6edb34d", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:189:26
[INFO] [stderr]     |
[INFO] [stderr] 189 | ...   let (mut modulus, final_carry) = limb_pairs_iter.fold((Vec::with_capacity(self.len() + 1), false), |(mut limbs, carry), (&self_limb...
[INFO] [stderr]     |            ----^^^^^^^
[INFO] [stderr]     |            |
[INFO] [stderr]     |            help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:189:26
[INFO] [stderr]     |
[INFO] [stderr] 189 | ...   let (mut modulus, final_carry) = limb_pairs_iter.fold((Vec::with_capacity(self.len() + 1), false), |(mut limbs, carry), (&self_limb...
[INFO] [stderr]     |            ----^^^^^^^
[INFO] [stderr]     |            |
[INFO] [stderr]     |            help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/bigmaths-bd915ccb5c51ef0d
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test tests::bigint_add_big_pos_and_neg ... ok
[INFO] [stdout] test tests::bigint_add_little_pos_and_neg ... ok
[INFO] [stdout] test tests::bigint_add_little_two_neg ... ok
[INFO] [stdout] test tests::bigint_add_little_two_pos ... ok
[INFO] [stdout] test tests::bigint_from_zero_isize ... ok
[INFO] [stdout] test tests::bigint_sub_big_pos_and_neg ... ok
[INFO] [stdout] test tests::bigint_sub_big_two_neg ... ok
[INFO] [stdout] test tests::bigint_sub_big_two_pos ... ok
[INFO] [stdout] test tests::bigint_sub_little_pos_and_neg ... ok
[INFO] [stdout] test tests::bigint_sub_little_two_neg ... ok
[INFO] [stdout] test tests::bigint_sub_little_two_pos ... ok
[INFO] [stdout] test tests::bigint_from_positive_isize ... ok
[INFO] [stdout] test tests::bigint_from_negative_isize ... ok
[INFO] [stdout] test tests::bigint_add_big_two_pos ... ok
[INFO] [stdout] test tests::bigint_from_min_isize ... ok
[INFO] [stdout] test tests::bigint_add_big_two_neg ... ok
[INFO] [stdout] test tests::bigint_from_and_to_isize ... ok
[INFO] [stdout] test tests::bigint_from_max_isize ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests bigmaths
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b22dbb02b9d08d45d3c6a389e66e2263c13894958f5f70c2dc7b278fa6edb34d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b22dbb02b9d08d45d3c6a389e66e2263c13894958f5f70c2dc7b278fa6edb34d", kill_on_drop: false }`
[INFO] [stdout] b22dbb02b9d08d45d3c6a389e66e2263c13894958f5f70c2dc7b278fa6edb34d