[INFO] cloning repository https://github.com/sander777/big_numbers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sander777/big_numbers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsander777%2Fbig_numbers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsander777%2Fbig_numbers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ec813b9fbf7f1dfbbeeefa36209a515c7e79fb6
[INFO] testing sander777/big_numbers against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsander777%2Fbig_numbers" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sander777/big_numbers on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sander777/big_numbers
[INFO] finished tweaking git repo https://github.com/sander777/big_numbers
[INFO] tweaked toml for git repo https://github.com/sander777/big_numbers written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/sander777/big_numbers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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] e80109e9299949dc76b5d247c3552a1ec35d5b3faa0e3f74bcac821eb59f0928
[INFO] running `Command { std: "docker" "start" "-a" "e80109e9299949dc76b5d247c3552a1ec35d5b3faa0e3f74bcac821eb59f0928", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e80109e9299949dc76b5d247c3552a1ec35d5b3faa0e3f74bcac821eb59f0928", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e80109e9299949dc76b5d247c3552a1ec35d5b3faa0e3f74bcac821eb59f0928", kill_on_drop: false }`
[INFO] [stdout] e80109e9299949dc76b5d247c3552a1ec35d5b3faa0e3f74bcac821eb59f0928
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89c8345b8e7eb6cd47e3ccde3d7884a9a3ae822e6c06bb3c0f167f645291c392
[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" "89c8345b8e7eb6cd47e3ccde3d7884a9a3ae822e6c06bb3c0f167f645291c392", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling getrandom v0.2.1
[INFO] [stderr]    Compiling rand_core v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.1
[INFO] [stderr]    Compiling my_big_numbers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `num_list` is never read
[INFO] [stdout]    --> src/big_number.rs:212:17
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let mut num_list = LinkedList::new();
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `sign` is never read
[INFO] [stdout]    --> src/big_number.rs:213:17
[INFO] [stdout]     |
[INFO] [stdout] 213 |         let mut sign = 1;
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `num_list` is never read
[INFO] [stdout]    --> src/big_number.rs:212:17
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let mut num_list = LinkedList::new();
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `sign` is never read
[INFO] [stdout]    --> src/big_number.rs:213:17
[INFO] [stdout]     |
[INFO] [stdout] 213 |         let mut sign = 1;
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]   --> src/main.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.62s
[INFO] running `Command { std: "docker" "inspect" "89c8345b8e7eb6cd47e3ccde3d7884a9a3ae822e6c06bb3c0f167f645291c392", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89c8345b8e7eb6cd47e3ccde3d7884a9a3ae822e6c06bb3c0f167f645291c392", kill_on_drop: false }`
[INFO] [stdout] 89c8345b8e7eb6cd47e3ccde3d7884a9a3ae822e6c06bb3c0f167f645291c392
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1acc0c2bdd06d6ed1fcb067f599a80979a57e5670e7cf756df473c697ad299da
[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" "1acc0c2bdd06d6ed1fcb067f599a80979a57e5670e7cf756df473c697ad299da", kill_on_drop: false }`
[INFO] [stderr]    Compiling my_big_numbers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `num_list` is never read
[INFO] [stdout]    --> src/big_number.rs:212:17
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let mut num_list = LinkedList::new();
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `sign` is never read
[INFO] [stdout]    --> src/big_number.rs:213:17
[INFO] [stdout]     |
[INFO] [stdout] 213 |         let mut sign = 1;
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `num_list` is never read
[INFO] [stdout]    --> src/big_number.rs:212:17
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let mut num_list = LinkedList::new();
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `sign` is never read
[INFO] [stdout]    --> src/big_number.rs:213:17
[INFO] [stdout]     |
[INFO] [stdout] 213 |         let mut sign = 1;
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `num_list` is never read
[INFO] [stdout]    --> src/big_number.rs:212:17
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let mut num_list = LinkedList::new();
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `sign` is never read
[INFO] [stdout]    --> src/big_number.rs:213:17
[INFO] [stdout]     |
[INFO] [stdout] 213 |         let mut sign = 1;
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]   --> src/main.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "1acc0c2bdd06d6ed1fcb067f599a80979a57e5670e7cf756df473c697ad299da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1acc0c2bdd06d6ed1fcb067f599a80979a57e5670e7cf756df473c697ad299da", kill_on_drop: false }`
[INFO] [stdout] 1acc0c2bdd06d6ed1fcb067f599a80979a57e5670e7cf756df473c697ad299da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 82c1516abef8046651f64a790c3b5b68761bc65425b1718cfb45bdf3ae940f0f
[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" "82c1516abef8046651f64a790c3b5b68761bc65425b1718cfb45bdf3ae940f0f", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `num_list` is never read
[INFO] [stderr]    --> src/big_number.rs:212:17
[INFO] [stderr]     |
[INFO] [stderr] 212 |         let mut num_list = LinkedList::new();
[INFO] [stderr]     |                 ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `sign` is never read
[INFO] [stderr]    --> src/big_number.rs:213:17
[INFO] [stderr]     |
[INFO] [stderr] 213 |         let mut sign = 1;
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: `my_big_numbers` (lib) generated 2 warnings
[INFO] [stdout] running 0 tests
[INFO] [stderr] warning: `my_big_numbers` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stdout] 
[INFO] [stderr] warning: function is never used: `test`
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]   --> src/main.rs:32:4
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn test() {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `my_big_numbers` (bin "my_big_numbers" test) generated 3 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/my_big_numbers-25734a043675cf5c)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/my_big_numbers-7233293d01bec80d)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests my_big_numbers
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "82c1516abef8046651f64a790c3b5b68761bc65425b1718cfb45bdf3ae940f0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82c1516abef8046651f64a790c3b5b68761bc65425b1718cfb45bdf3ae940f0f", kill_on_drop: false }`
[INFO] [stdout] 82c1516abef8046651f64a790c3b5b68761bc65425b1718cfb45bdf3ae940f0f