[INFO] cloning repository https://github.com/gclsgithub/rustStudy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gclsgithub/rustStudy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgclsgithub%2FrustStudy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgclsgithub%2FrustStudy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 79231cca5dc28409a976e3abefd00b88eb6f1827
[INFO] testing gclsgithub/rustStudy against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgclsgithub%2FrustStudy" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gclsgithub/rustStudy on toolchain a7ce54db9b096bd1098d07c645b489195a667c9f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gclsgithub/rustStudy
[INFO] finished tweaking git repo https://github.com/gclsgithub/rustStudy
[INFO] tweaked toml for git repo https://github.com/gclsgithub/rustStudy written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/gclsgithub/rustStudy 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" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e70a90b40fab4c5808b5304b2cff58b00ad0b91d62453a9a6dc7dcf0039af1f
[INFO] running `Command { std: "docker" "start" "-a" "1e70a90b40fab4c5808b5304b2cff58b00ad0b91d62453a9a6dc7dcf0039af1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e70a90b40fab4c5808b5304b2cff58b00ad0b91d62453a9a6dc7dcf0039af1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e70a90b40fab4c5808b5304b2cff58b00ad0b91d62453a9a6dc7dcf0039af1f", kill_on_drop: false }`
[INFO] [stdout] 1e70a90b40fab4c5808b5304b2cff58b00ad0b91d62453a9a6dc7dcf0039af1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af3e01b8c41a0360f575e6c4e217e137a16f204c64f3fa1ea0eaed205d74610a
[INFO] running `Command { std: "docker" "start" "-a" "af3e01b8c41a0360f575e6c4e217e137a16f204c64f3fa1ea0eaed205d74610a", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/stack_heap.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut v3 = vec![9, 10];
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vars.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let mut s2 = String::from("helloword");
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]  --> src/stack_heap.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum List {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_POINT` is never used
[INFO] [stdout]  --> src/vars.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub const MAX_POINT: u32 = 100_000;
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/vars.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fun` is never used
[INFO] [stdout]  --> src/vars/sub_a.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn fun() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fun` is never used
[INFO] [stdout]  --> src/vars/sub_b.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn fun(){
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "af3e01b8c41a0360f575e6c4e217e137a16f204c64f3fa1ea0eaed205d74610a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af3e01b8c41a0360f575e6c4e217e137a16f204c64f3fa1ea0eaed205d74610a", kill_on_drop: false }`
[INFO] [stdout] af3e01b8c41a0360f575e6c4e217e137a16f204c64f3fa1ea0eaed205d74610a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe2efb21bdef9e85fc53dce87944e09a86909d065b30b9bbf4847f3b1a911440
[INFO] running `Command { std: "docker" "start" "-a" "fe2efb21bdef9e85fc53dce87944e09a86909d065b30b9bbf4847f3b1a911440", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/stack_heap.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut v3 = vec![9, 10];
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vars.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let mut s2 = String::from("helloword");
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]  --> src/stack_heap.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum List {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_POINT` is never used
[INFO] [stdout]  --> src/vars.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub const MAX_POINT: u32 = 100_000;
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/vars.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fun` is never used
[INFO] [stdout]  --> src/vars/sub_a.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn fun() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fun` is never used
[INFO] [stdout]  --> src/vars/sub_b.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn fun(){
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "fe2efb21bdef9e85fc53dce87944e09a86909d065b30b9bbf4847f3b1a911440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe2efb21bdef9e85fc53dce87944e09a86909d065b30b9bbf4847f3b1a911440", kill_on_drop: false }`
[INFO] [stdout] fe2efb21bdef9e85fc53dce87944e09a86909d065b30b9bbf4847f3b1a911440
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 90493a8adeb239440a6d88a4c113680375efa3f6aa2e5d652413c6a378425e7a
[INFO] running `Command { std: "docker" "start" "-a" "90493a8adeb239440a6d88a4c113680375efa3f6aa2e5d652413c6a378425e7a", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/stack_heap.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut v3 = vec![9, 10];
[INFO] [stderr]    |         ----^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/vars.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 |     let mut s2 = String::from("helloword");
[INFO] [stderr]    |         ----^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: enum `List` is never used
[INFO] [stderr]  --> src/stack_heap.rs:1:6
[INFO] [stderr]   |
[INFO] [stderr] 1 | enum List {
[INFO] [stderr]   |      ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `MAX_POINT` is never used
[INFO] [stderr]  --> src/vars.rs:4:11
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub const MAX_POINT: u32 = 100_000;
[INFO] [stderr]   |           ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]  --> src/vars.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `fun` is never used
[INFO] [stderr]  --> src/vars/sub_a.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn fun() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `fun` is never used
[INFO] [stderr]  --> src/vars/sub_b.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn fun(){
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `hello_world` (bin "hello_world" test) generated 7 warnings (run `cargo fix --bin "hello_world" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hello_world-2519d57beebfdc07)
[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" "90493a8adeb239440a6d88a4c113680375efa3f6aa2e5d652413c6a378425e7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90493a8adeb239440a6d88a4c113680375efa3f6aa2e5d652413c6a378425e7a", kill_on_drop: false }`
[INFO] [stdout] 90493a8adeb239440a6d88a4c113680375efa3f6aa2e5d652413c6a378425e7a