[INFO] cloning repository https://github.com/JoanneGeng/firstrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JoanneGeng/firstrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoanneGeng%2Ffirstrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoanneGeng%2Ffirstrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 124658cde20d7083024d5870a2ca535f5770021f
[INFO] testing JoanneGeng/firstrust against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoanneGeng%2Ffirstrust" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JoanneGeng/firstrust on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JoanneGeng/firstrust
[INFO] finished tweaking git repo https://github.com/JoanneGeng/firstrust
[INFO] tweaked toml for git repo https://github.com/JoanneGeng/firstrust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/JoanneGeng/firstrust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7786b827237210dcb3effb9ecfe1c1720b5cb81fa2923d14b82f5c53b3a21d17
[INFO] running `Command { std: "docker" "start" "-a" "7786b827237210dcb3effb9ecfe1c1720b5cb81fa2923d14b82f5c53b3a21d17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7786b827237210dcb3effb9ecfe1c1720b5cb81fa2923d14b82f5c53b3a21d17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7786b827237210dcb3effb9ecfe1c1720b5cb81fa2923d14b82f5c53b3a21d17", kill_on_drop: false }`
[INFO] [stdout] 7786b827237210dcb3effb9ecfe1c1720b5cb81fa2923d14b82f5c53b3a21d17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42a797bfdd924128fc2fc3ea0ba1c0e2c9963ac3547d307336b603cd2a8752bd
[INFO] running `Command { std: "docker" "start" "-a" "42a797bfdd924128fc2fc3ea0ba1c0e2c9963ac3547d307336b603cd2a8752bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling firstrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `ownership_and_copy_main`
[INFO] [stdout]  --> src/ownership.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub(crate) fn ownership_and_copy_main() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/ownership.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn takes_ownership(some_string: String) { // some_string comes into scope.
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]   --> src/ownership.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn makes_copy(some_integer: i32) { // some_integer comes into scope.
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_and_scope_main`
[INFO] [stdout]   --> src/ownership.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub(crate) fn return_and_scope_main() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gives_ownership`
[INFO] [stdout]   --> src/ownership.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn gives_ownership() -> String {             // gives_ownership will move its
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_and_gives_back`
[INFO] [stdout]   --> src/ownership.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn takes_and_gives_back(a_string: String) -> String { // a_string comes into
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tuple_main`
[INFO] [stdout]   --> src/ownership.rs:75:15
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub(crate) fn tuple_main() {
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_length`
[INFO] [stdout]   --> src/ownership.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn calculate_length(s: String) -> (String, usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "42a797bfdd924128fc2fc3ea0ba1c0e2c9963ac3547d307336b603cd2a8752bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42a797bfdd924128fc2fc3ea0ba1c0e2c9963ac3547d307336b603cd2a8752bd", kill_on_drop: false }`
[INFO] [stdout] 42a797bfdd924128fc2fc3ea0ba1c0e2c9963ac3547d307336b603cd2a8752bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3c96a5da318619caaede89e91a343398b679b292f7d595238fe393aae99db56
[INFO] running `Command { std: "docker" "start" "-a" "a3c96a5da318619caaede89e91a343398b679b292f7d595238fe393aae99db56", kill_on_drop: false }`
[INFO] [stderr]    Compiling firstrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `ownership_and_copy_main`
[INFO] [stdout]  --> src/ownership.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub(crate) fn ownership_and_copy_main() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/ownership.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn takes_ownership(some_string: String) { // some_string comes into scope.
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]   --> src/ownership.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn makes_copy(some_integer: i32) { // some_integer comes into scope.
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_and_scope_main`
[INFO] [stdout]   --> src/ownership.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub(crate) fn return_and_scope_main() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gives_ownership`
[INFO] [stdout]   --> src/ownership.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn gives_ownership() -> String {             // gives_ownership will move its
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_and_gives_back`
[INFO] [stdout]   --> src/ownership.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn takes_and_gives_back(a_string: String) -> String { // a_string comes into
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tuple_main`
[INFO] [stdout]   --> src/ownership.rs:75:15
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub(crate) fn tuple_main() {
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_length`
[INFO] [stdout]   --> src/ownership.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn calculate_length(s: String) -> (String, usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "a3c96a5da318619caaede89e91a343398b679b292f7d595238fe393aae99db56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3c96a5da318619caaede89e91a343398b679b292f7d595238fe393aae99db56", kill_on_drop: false }`
[INFO] [stdout] a3c96a5da318619caaede89e91a343398b679b292f7d595238fe393aae99db56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 342f3885a1dee3b3ba0ec3e33a0b797b77ec7285113265ddc708a0ce20fba056
[INFO] running `Command { std: "docker" "start" "-a" "342f3885a1dee3b3ba0ec3e33a0b797b77ec7285113265ddc708a0ce20fba056", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `ownership_and_copy_main`
[INFO] [stderr]  --> src/ownership.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub(crate) fn ownership_and_copy_main() {
[INFO] [stderr]   |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `takes_ownership`
[INFO] [stderr]   --> src/ownership.rs:25:4
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn takes_ownership(some_string: String) { // some_string comes into scope.
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `makes_copy`
[INFO] [stderr]   --> src/ownership.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn makes_copy(some_integer: i32) { // some_integer comes into scope.
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `return_and_scope_main`
[INFO] [stderr]   --> src/ownership.rs:38:15
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub(crate) fn return_and_scope_main() {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gives_ownership`
[INFO] [stderr]   --> src/ownership.rs:54:4
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn gives_ownership() -> String {             // gives_ownership will move its
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `takes_and_gives_back`
[INFO] [stderr]   --> src/ownership.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn takes_and_gives_back(a_string: String) -> String { // a_string comes into
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuple_main`
[INFO] [stderr]   --> src/ownership.rs:75:15
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub(crate) fn tuple_main() {
[INFO] [stderr]    |               ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calculate_length`
[INFO] [stderr]   --> src/ownership.rs:83:4
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn calculate_length(s: String) -> (String, usize) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `firstrust` (bin "firstrust" test) generated 8 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/firstrust-6718ede9583e3c16)
[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" "342f3885a1dee3b3ba0ec3e33a0b797b77ec7285113265ddc708a0ce20fba056", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "342f3885a1dee3b3ba0ec3e33a0b797b77ec7285113265ddc708a0ce20fba056", kill_on_drop: false }`
[INFO] [stdout] 342f3885a1dee3b3ba0ec3e33a0b797b77ec7285113265ddc708a0ce20fba056