[INFO] cloning repository https://github.com/golanor/manning_public_key_cryptography
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/golanor/manning_public_key_cryptography" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgolanor%2Fmanning_public_key_cryptography", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgolanor%2Fmanning_public_key_cryptography'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7291ace2dbbdabd8881fab82df0f7fc222f44fc0
[INFO] building golanor/manning_public_key_cryptography 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%2Fgolanor%2Fmanning_public_key_cryptography" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/golanor/manning_public_key_cryptography 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/golanor/manning_public_key_cryptography
[INFO] finished tweaking git repo https://github.com/golanor/manning_public_key_cryptography
[INFO] tweaked toml for git repo https://github.com/golanor/manning_public_key_cryptography written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/golanor/manning_public_key_cryptography 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] fcbb2d7dcf60d101ed6836bb4e3907de5326b7d9140ca4cd657ce93150ad3bb8
[INFO] running `Command { std: "docker" "start" "-a" "fcbb2d7dcf60d101ed6836bb4e3907de5326b7d9140ca4cd657ce93150ad3bb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcbb2d7dcf60d101ed6836bb4e3907de5326b7d9140ca4cd657ce93150ad3bb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcbb2d7dcf60d101ed6836bb4e3907de5326b7d9140ca4cd657ce93150ad3bb8", kill_on_drop: false }`
[INFO] [stdout] fcbb2d7dcf60d101ed6836bb4e3907de5326b7d9140ca4cd657ce93150ad3bb8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 8e3b60653692b5c2455031134ca8c819ec7789aebf76183b840bf0cb74120038
[INFO] running `Command { std: "docker" "start" "-a" "8e3b60653692b5c2455031134ca8c819ec7789aebf76183b840bf0cb74120038", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling manning-public-key-cryptography v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `fast_exp` is never used
[INFO] [stdout]   --> src/main.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn fast_exp(a: u64, b: u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NUM_TESTS` is never used
[INFO] [stdout]  --> src/primality_testing.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 |     const NUM_TESTS: u64 = 20;
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/primality_testing.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn main() {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_factors` is never used
[INFO] [stdout]  --> src/prime_factors.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn find_factors(mut num: u64) -> Vec<u64> {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiply_vector` is never used
[INFO] [stdout]   --> src/prime_factors.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn multiply_vector(v: Vec<u64>) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_factors_sieve` is never used
[INFO] [stdout]   --> src/prime_factors.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn find_factors_sieve(mut num: u64, primes: Vec<u64>) -> Vec<u64> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/prime_factors.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn main() {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sieve_of_eratosthenes` is never used
[INFO] [stdout]  --> src/sieve.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     pub fn sieve_of_eratosthenes(limit: usize) -> Vec<bool> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_sieve` is never used
[INFO] [stdout]   --> src/sieve.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn print_sieve(sieve: &Vec<bool>) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sieve_to_primes` is never used
[INFO] [stdout]   --> src/sieve.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn sieve_to_primes(sieve: Vec<bool>) -> Vec<u64> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_numbers` is never used
[INFO] [stdout]   --> src/sieve.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn print_numbers(primes: &mut Vec<u64>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/sieve.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn main() {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.17s
[INFO] running `Command { std: "docker" "inspect" "8e3b60653692b5c2455031134ca8c819ec7789aebf76183b840bf0cb74120038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e3b60653692b5c2455031134ca8c819ec7789aebf76183b840bf0cb74120038", kill_on_drop: false }`
[INFO] [stdout] 8e3b60653692b5c2455031134ca8c819ec7789aebf76183b840bf0cb74120038
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 5ea68de7207fc412823d553f450d605b4eb4583360a77863bd619dbf3fe3348c
[INFO] running `Command { std: "docker" "start" "-a" "5ea68de7207fc412823d553f450d605b4eb4583360a77863bd619dbf3fe3348c", kill_on_drop: false }`
[INFO] [stderr]    Compiling manning-public-key-cryptography v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `fast_exp` is never used
[INFO] [stdout]   --> src/main.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn fast_exp(a: u64, b: u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NUM_TESTS` is never used
[INFO] [stdout]  --> src/primality_testing.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 |     const NUM_TESTS: u64 = 20;
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/primality_testing.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn main() {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_factors` is never used
[INFO] [stdout]  --> src/prime_factors.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn find_factors(mut num: u64) -> Vec<u64> {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiply_vector` is never used
[INFO] [stdout]   --> src/prime_factors.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn multiply_vector(v: Vec<u64>) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_factors_sieve` is never used
[INFO] [stdout]   --> src/prime_factors.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn find_factors_sieve(mut num: u64, primes: Vec<u64>) -> Vec<u64> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/prime_factors.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn main() {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sieve_of_eratosthenes` is never used
[INFO] [stdout]  --> src/sieve.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     pub fn sieve_of_eratosthenes(limit: usize) -> Vec<bool> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_sieve` is never used
[INFO] [stdout]   --> src/sieve.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn print_sieve(sieve: &Vec<bool>) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sieve_to_primes` is never used
[INFO] [stdout]   --> src/sieve.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn sieve_to_primes(sieve: Vec<bool>) -> Vec<u64> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_numbers` is never used
[INFO] [stdout]   --> src/sieve.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn print_numbers(primes: &mut Vec<u64>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/sieve.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn main() {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "5ea68de7207fc412823d553f450d605b4eb4583360a77863bd619dbf3fe3348c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ea68de7207fc412823d553f450d605b4eb4583360a77863bd619dbf3fe3348c", kill_on_drop: false }`
[INFO] [stdout] 5ea68de7207fc412823d553f450d605b4eb4583360a77863bd619dbf3fe3348c