[INFO] cloning repository https://github.com/queirozrphl/rust_merkle_tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/queirozrphl/rust_merkle_tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqueirozrphl%2Frust_merkle_tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqueirozrphl%2Frust_merkle_tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8080db56bf50f89b664bc810ca79d8087f6eea63
[INFO] building queirozrphl/rust_merkle_tree 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%2Fqueirozrphl%2Frust_merkle_tree" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/queirozrphl/rust_merkle_tree 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/queirozrphl/rust_merkle_tree
[INFO] finished tweaking git repo https://github.com/queirozrphl/rust_merkle_tree
[INFO] tweaked toml for git repo https://github.com/queirozrphl/rust_merkle_tree written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/queirozrphl/rust_merkle_tree 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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 75f1109bf217843b168c746b4ee15823d4904b8d119f3a8f81e1bee0fedc6b4e
[INFO] running `Command { std: "docker" "start" "-a" "75f1109bf217843b168c746b4ee15823d4904b8d119f3a8f81e1bee0fedc6b4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75f1109bf217843b168c746b4ee15823d4904b8d119f3a8f81e1bee0fedc6b4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75f1109bf217843b168c746b4ee15823d4904b8d119f3a8f81e1bee0fedc6b4e", kill_on_drop: false }`
[INFO] [stdout] 75f1109bf217843b168c746b4ee15823d4904b8d119f3a8f81e1bee0fedc6b4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 738397422ef4bc7edc6d9bfdda33cb898146b8e857b5b67da792b5201bc63ea8
[INFO] running `Command { std: "docker" "start" "-a" "738397422ef4bc7edc6d9bfdda33cb898146b8e857b5b67da792b5201bc63ea8", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling sha2 v0.10.8
[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 merkle_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/merkle_metrics.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 |   for i in 0..(number_of_measurements + 1) {
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `merkle_tree`
[INFO] [stdout]   --> src/merkle_metrics.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let merkle_tree = merkle_tree::MerkleTree::new((&random_numbers).clone());
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_merkle_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/merkle_metrics.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 |   for i in 0..(number_of_measurements + 1) {
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `proof`
[INFO] [stdout]   --> src/merkle_metrics.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let proof: Vec<(Vec<u8>, bool)> = merkle_tree.generate_proof(random_index as u8);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_proof`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/merkle_metrics.rs:63:7
[INFO] [stdout]    |
[INFO] [stdout] 63 |   for i in 0..(number_of_measurements + 1) {
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_valid`
[INFO] [stdout]   --> src/merkle_metrics.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let is_valid = merkle_tree.verify_proof(proof, data_value, root_hash);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_valid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_random_numbers` is never used
[INFO] [stdout]  --> src/merkle_metrics.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn generate_random_numbers(n: usize) -> Vec<u8> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `testing_creation_time` is never used
[INFO] [stdout]   --> src/merkle_metrics.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn testing_creation_time() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `testing_proof_gen_time` is never used
[INFO] [stdout]   --> src/merkle_metrics.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn testing_proof_gen_time() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `testing_verify_proof_time` is never used
[INFO] [stdout]   --> src/merkle_metrics.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn testing_verify_proof_time() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_metrics` is never used
[INFO] [stdout]   --> src/merkle_metrics.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub fn run_metrics() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.16s
[INFO] running `Command { std: "docker" "inspect" "738397422ef4bc7edc6d9bfdda33cb898146b8e857b5b67da792b5201bc63ea8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "738397422ef4bc7edc6d9bfdda33cb898146b8e857b5b67da792b5201bc63ea8", kill_on_drop: false }`
[INFO] [stdout] 738397422ef4bc7edc6d9bfdda33cb898146b8e857b5b67da792b5201bc63ea8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 99352967ccf02230205066284c82c4e6cf9a32e31e4a4e3951fd5da10a4c9abe
[INFO] running `Command { std: "docker" "start" "-a" "99352967ccf02230205066284c82c4e6cf9a32e31e4a4e3951fd5da10a4c9abe", kill_on_drop: false }`
[INFO] [stderr]    Compiling merkle_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/merkle_metrics.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 |   for i in 0..(number_of_measurements + 1) {
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `merkle_tree`
[INFO] [stdout]   --> src/merkle_metrics.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let merkle_tree = merkle_tree::MerkleTree::new((&random_numbers).clone());
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_merkle_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/merkle_metrics.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 |   for i in 0..(number_of_measurements + 1) {
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `proof`
[INFO] [stdout]   --> src/merkle_metrics.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let proof: Vec<(Vec<u8>, bool)> = merkle_tree.generate_proof(random_index as u8);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_proof`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/merkle_metrics.rs:63:7
[INFO] [stdout]    |
[INFO] [stdout] 63 |   for i in 0..(number_of_measurements + 1) {
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_valid`
[INFO] [stdout]   --> src/merkle_metrics.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let is_valid = merkle_tree.verify_proof(proof, data_value, root_hash);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_valid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_random_numbers` is never used
[INFO] [stdout]  --> src/merkle_metrics.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn generate_random_numbers(n: usize) -> Vec<u8> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `testing_creation_time` is never used
[INFO] [stdout]   --> src/merkle_metrics.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn testing_creation_time() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `testing_proof_gen_time` is never used
[INFO] [stdout]   --> src/merkle_metrics.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn testing_proof_gen_time() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `testing_verify_proof_time` is never used
[INFO] [stdout]   --> src/merkle_metrics.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn testing_verify_proof_time() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_metrics` is never used
[INFO] [stdout]   --> src/merkle_metrics.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub fn run_metrics() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "99352967ccf02230205066284c82c4e6cf9a32e31e4a4e3951fd5da10a4c9abe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99352967ccf02230205066284c82c4e6cf9a32e31e4a4e3951fd5da10a4c9abe", kill_on_drop: false }`
[INFO] [stdout] 99352967ccf02230205066284c82c4e6cf9a32e31e4a4e3951fd5da10a4c9abe