[INFO] cloning repository https://github.com/meskill/rust-lab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/meskill/rust-lab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmeskill%2Frust-lab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmeskill%2Frust-lab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 184c9976ea4effc4be284e05758e040c4bd19730
[INFO] building meskill/rust-lab against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmeskill%2Frust-lab" "/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/meskill/rust-lab on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/meskill/rust-lab
[INFO] finished tweaking git repo https://github.com/meskill/rust-lab
[INFO] tweaked toml for git repo https://github.com/meskill/rust-lab written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/meskill/rust-lab 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79bbbf8353f8b6dab8f4f093154e7ae3585d527985248f7144d92cf7916ab951
[INFO] running `Command { std: "docker" "start" "-a" "79bbbf8353f8b6dab8f4f093154e7ae3585d527985248f7144d92cf7916ab951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79bbbf8353f8b6dab8f4f093154e7ae3585d527985248f7144d92cf7916ab951", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79bbbf8353f8b6dab8f4f093154e7ae3585d527985248f7144d92cf7916ab951", kill_on_drop: false }`
[INFO] [stdout] 79bbbf8353f8b6dab8f4f093154e7ae3585d527985248f7144d92cf7916ab951
[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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4466d7945c31ab93f7e6e7964041a9d2ad05f7cc51979b92c0e927059ac85cee
[INFO] running `Command { std: "docker" "start" "-a" "4466d7945c31ab93f7e6e7964041a9d2ad05f7cc51979b92c0e927059ac85cee", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stderr]    Compiling num_threads v0.1.3
[INFO] [stderr]    Compiling web_server v0.1.0 (/opt/rustwide/workdir/book/web_server)
[INFO] [stderr]    Compiling become_immortal v0.1.0 (/opt/rustwide/workdir/codewars/become_immortal)
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/rustwide/workdir/book/minigrep)
[INFO] [stderr]    Compiling collatz_conjecture v1.2.1 (/opt/rustwide/workdir/exercism/rust/collatz-conjecture)
[INFO] [stderr]    Compiling eval_math_expression v0.1.0 (/opt/rustwide/workdir/codewars/eval_math_expression)
[INFO] [stderr]    Compiling clock v2.4.0 (/opt/rustwide/workdir/exercism/rust/clock)
[INFO] [stderr]    Compiling series v0.1.0 (/opt/rustwide/workdir/exercism/rust/series)
[INFO] [stderr]    Compiling high-scores v4.0.0 (/opt/rustwide/workdir/exercism/rust/high-scores)
[INFO] [stderr]    Compiling matching-brackets v2.0.0 (/opt/rustwide/workdir/exercism/rust/matching-brackets)
[INFO] [stderr]    Compiling armstrong_numbers v1.1.0 (/opt/rustwide/workdir/exercism/rust/armstrong-numbers)
[INFO] [stderr]    Compiling anagram v0.0.0 (/opt/rustwide/workdir/exercism/rust/anagram)
[INFO] [stdout] warning: function `elder_age` is never used
[INFO] [stdout]  --> codewars/become_immortal/src/lib.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn elder_age(m: u64, n: u64, l: u64, t: u64) -> u64 {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling nth_prime v2.1.0 (/opt/rustwide/workdir/exercism/rust/nth-prime)
[INFO] [stderr]    Compiling reverse_string v1.2.0 (/opt/rustwide/workdir/exercism/rust/reverse-string)
[INFO] [stderr]    Compiling sum-of-multiples v1.5.0 (/opt/rustwide/workdir/exercism/rust/sum-of-multiples)
[INFO] [stdout] warning: trait `Ast` is never used
[INFO] [stdout]    --> codewars/eval_math_expression/src/lib.rs:398:19
[INFO] [stdout]     |
[INFO] [stdout] 398 |         pub trait Ast<'token>: IntoIterator<Item = &'token Token> {}
[INFO] [stdout]     |                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling hamming v2.2.0 (/opt/rustwide/workdir/exercism/rust/hamming)
[INFO] [stderr]    Compiling difference-of-squares v1.2.0 (/opt/rustwide/workdir/exercism/rust/difference-of-squares)
[INFO] [stderr]    Compiling rail_fence_cypher v0.1.0 (/opt/rustwide/workdir/codewars/rail_fence_cypher)
[INFO] [stderr]    Compiling raindrops v1.1.0 (/opt/rustwide/workdir/exercism/rust/raindrops)
[INFO] [stderr]    Compiling luhn-from v0.0.0 (/opt/rustwide/workdir/exercism/rust/luhn-from)
[INFO] [stderr]    Compiling last-digit-of-a-large-number v0.1.0 (/opt/rustwide/workdir/codewars/last-digit-of-a-large-number)
[INFO] [stderr]    Compiling luhn v1.6.1 (/opt/rustwide/workdir/exercism/rust/luhn)
[INFO] [stderr]    Compiling luhn-trait v0.0.0 (/opt/rustwide/workdir/exercism/rust/luhn-trait)
[INFO] [stderr]    Compiling grains v1.2.0 (/opt/rustwide/workdir/exercism/rust/grains)
[INFO] [stderr]    Compiling bob v1.6.0 (/opt/rustwide/workdir/exercism/rust/bob)
[INFO] [stderr]    Compiling plants_and_zombies v0.1.0 (/opt/rustwide/workdir/codewars/plants_and_zombies)
[INFO] [stderr]    Compiling proverb v1.1.0 (/opt/rustwide/workdir/exercism/rust/proverb)
[INFO] [stderr]    Compiling prime_factors v1.1.0 (/opt/rustwide/workdir/exercism/rust/prime-factors)
[INFO] [stderr]    Compiling screen-locking-patterns v0.1.0 (/opt/rustwide/workdir/codewars/screen-locking-patterns)
[INFO] [stderr]    Compiling space-age v1.2.0 (/opt/rustwide/workdir/exercism/rust/space-age)
[INFO] [stderr]    Compiling leap v1.6.0 (/opt/rustwide/workdir/exercism/rust/leap)
[INFO] [stderr]    Compiling human-readable-duration-format v0.1.0 (/opt/rustwide/workdir/codewars/human-readable-duration-format)
[INFO] [stderr]    Compiling last-digit-of-a-huge-number v0.1.0 (/opt/rustwide/workdir/codewars/last-digit-of-a-huge-number)
[INFO] [stderr]    Compiling beer-song v0.0.0 (/opt/rustwide/workdir/exercism/rust/beer-song)
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling time v0.3.7
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling gigasecond v2.0.0 (/opt/rustwide/workdir/exercism/rust/gigasecond)
[INFO] [stderr]    Compiling minesweeper v1.1.0 (/opt/rustwide/workdir/exercism/rust/minesweeper)
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling n-queens-problem v0.1.0 (/opt/rustwide/workdir/codewars/n-queens-problem)
[INFO] [stderr]    Compiling diffie-hellman v0.1.0 (/opt/rustwide/workdir/exercism/rust/diffie-hellman)
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir/book/guessing_game)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.59s
[INFO] running `Command { std: "docker" "inspect" "4466d7945c31ab93f7e6e7964041a9d2ad05f7cc51979b92c0e927059ac85cee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4466d7945c31ab93f7e6e7964041a9d2ad05f7cc51979b92c0e927059ac85cee", kill_on_drop: false }`
[INFO] [stdout] 4466d7945c31ab93f7e6e7964041a9d2ad05f7cc51979b92c0e927059ac85cee
[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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab560cff2e12e2dcc95a041a2496b71558a59f13a2897597eceacd4fca10152e
[INFO] running `Command { std: "docker" "start" "-a" "ab560cff2e12e2dcc95a041a2496b71558a59f13a2897597eceacd4fca10152e", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stdout] warning: function `elder_age` is never used
[INFO] [stdout]  --> codewars/become_immortal/src/lib.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn elder_age(m: u64, n: u64, l: u64, t: u64) -> u64 {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling sum-of-multiples v1.5.0 (/opt/rustwide/workdir/exercism/rust/sum-of-multiples)
[INFO] [stderr]    Compiling matching-brackets v2.0.0 (/opt/rustwide/workdir/exercism/rust/matching-brackets)
[INFO] [stderr]    Compiling reverse_string v1.2.0 (/opt/rustwide/workdir/exercism/rust/reverse-string)
[INFO] [stderr]    Compiling armstrong_numbers v1.1.0 (/opt/rustwide/workdir/exercism/rust/armstrong-numbers)
[INFO] [stderr]    Compiling minesweeper v1.1.0 (/opt/rustwide/workdir/exercism/rust/minesweeper)
[INFO] [stderr]    Compiling luhn-trait v0.0.0 (/opt/rustwide/workdir/exercism/rust/luhn-trait)
[INFO] [stdout] warning: trait `Ast` is never used
[INFO] [stdout]    --> codewars/eval_math_expression/src/lib.rs:398:19
[INFO] [stdout]     |
[INFO] [stdout] 398 |         pub trait Ast<'token>: IntoIterator<Item = &'token Token> {}
[INFO] [stdout]     |                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling gigasecond v2.0.0 (/opt/rustwide/workdir/exercism/rust/gigasecond)
[INFO] [stderr]    Compiling clock v2.4.0 (/opt/rustwide/workdir/exercism/rust/clock)
[INFO] [stderr]    Compiling web_server v0.1.0 (/opt/rustwide/workdir/book/web_server)
[INFO] [stderr]    Compiling nth_prime v2.1.0 (/opt/rustwide/workdir/exercism/rust/nth-prime)
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/rustwide/workdir/book/minigrep)
[INFO] [stderr]    Compiling diffie-hellman v0.1.0 (/opt/rustwide/workdir/exercism/rust/diffie-hellman)
[INFO] [stderr]    Compiling n-queens-problem v0.1.0 (/opt/rustwide/workdir/codewars/n-queens-problem)
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir/book/guessing_game)
[INFO] [stderr]    Compiling collatz_conjecture v1.2.1 (/opt/rustwide/workdir/exercism/rust/collatz-conjecture)
[INFO] [stderr]    Compiling hamming v2.2.0 (/opt/rustwide/workdir/exercism/rust/hamming)
[INFO] [stderr]    Compiling series v0.1.0 (/opt/rustwide/workdir/exercism/rust/series)
[INFO] [stderr]    Compiling anagram v0.0.0 (/opt/rustwide/workdir/exercism/rust/anagram)
[INFO] [stderr]    Compiling luhn v1.6.1 (/opt/rustwide/workdir/exercism/rust/luhn)
[INFO] [stderr]    Compiling luhn-from v0.0.0 (/opt/rustwide/workdir/exercism/rust/luhn-from)
[INFO] [stderr]    Compiling grains v1.2.0 (/opt/rustwide/workdir/exercism/rust/grains)
[INFO] [stderr]    Compiling bob v1.6.0 (/opt/rustwide/workdir/exercism/rust/bob)
[INFO] [stderr]    Compiling raindrops v1.1.0 (/opt/rustwide/workdir/exercism/rust/raindrops)
[INFO] [stderr]    Compiling high-scores v4.0.0 (/opt/rustwide/workdir/exercism/rust/high-scores)
[INFO] [stderr]    Compiling become_immortal v0.1.0 (/opt/rustwide/workdir/codewars/become_immortal)
[INFO] [stderr]    Compiling leap v1.6.0 (/opt/rustwide/workdir/exercism/rust/leap)
[INFO] [stderr]    Compiling beer-song v0.0.0 (/opt/rustwide/workdir/exercism/rust/beer-song)
[INFO] [stderr]    Compiling space-age v1.2.0 (/opt/rustwide/workdir/exercism/rust/space-age)
[INFO] [stderr]    Compiling prime_factors v1.1.0 (/opt/rustwide/workdir/exercism/rust/prime-factors)
[INFO] [stderr]    Compiling difference-of-squares v1.2.0 (/opt/rustwide/workdir/exercism/rust/difference-of-squares)
[INFO] [stderr]    Compiling proverb v1.1.0 (/opt/rustwide/workdir/exercism/rust/proverb)
[INFO] [stderr]    Compiling plants_and_zombies v0.1.0 (/opt/rustwide/workdir/codewars/plants_and_zombies)
[INFO] [stderr]    Compiling human-readable-duration-format v0.1.0 (/opt/rustwide/workdir/codewars/human-readable-duration-format)
[INFO] [stderr]    Compiling eval_math_expression v0.1.0 (/opt/rustwide/workdir/codewars/eval_math_expression)
[INFO] [stderr]    Compiling last-digit-of-a-huge-number v0.1.0 (/opt/rustwide/workdir/codewars/last-digit-of-a-huge-number)
[INFO] [stdout] warning: trait `Ast` is never used
[INFO] [stdout]    --> codewars/eval_math_expression/src/lib.rs:398:19
[INFO] [stdout]     |
[INFO] [stdout] 398 |         pub trait Ast<'token>: IntoIterator<Item = &'token Token> {}
[INFO] [stdout]     |                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rail_fence_cypher v0.1.0 (/opt/rustwide/workdir/codewars/rail_fence_cypher)
[INFO] [stderr]    Compiling screen-locking-patterns v0.1.0 (/opt/rustwide/workdir/codewars/screen-locking-patterns)
[INFO] [stderr]    Compiling last-digit-of-a-large-number v0.1.0 (/opt/rustwide/workdir/codewars/last-digit-of-a-large-number)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.43s
[INFO] running `Command { std: "docker" "inspect" "ab560cff2e12e2dcc95a041a2496b71558a59f13a2897597eceacd4fca10152e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab560cff2e12e2dcc95a041a2496b71558a59f13a2897597eceacd4fca10152e", kill_on_drop: false }`
[INFO] [stdout] ab560cff2e12e2dcc95a041a2496b71558a59f13a2897597eceacd4fca10152e