[INFO] cloning repository https://github.com/b-fuze/naive-sorting [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/b-fuze/naive-sorting" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb-fuze%2Fnaive-sorting", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb-fuze%2Fnaive-sorting'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 7b8ec7d010f5174e73aa2c36161f003191dd3e43 [INFO] building b-fuze/naive-sorting 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%2Fb-fuze%2Fnaive-sorting" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/b-fuze/naive-sorting 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/b-fuze/naive-sorting [INFO] finished tweaking git repo https://github.com/b-fuze/naive-sorting [INFO] tweaked toml for git repo https://github.com/b-fuze/naive-sorting written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/b-fuze/naive-sorting 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] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 87a9542a1a9f72a17f5f1e91f6d15f8191da9f84f5d1e56920662ef59f1541a9 [INFO] running `Command { std: "docker" "start" "-a" "87a9542a1a9f72a17f5f1e91f6d15f8191da9f84f5d1e56920662ef59f1541a9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "87a9542a1a9f72a17f5f1e91f6d15f8191da9f84f5d1e56920662ef59f1541a9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "87a9542a1a9f72a17f5f1e91f6d15f8191da9f84f5d1e56920662ef59f1541a9", kill_on_drop: false }` [INFO] [stdout] 87a9542a1a9f72a17f5f1e91f6d15f8191da9f84f5d1e56920662ef59f1541a9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] c93c0b7c2a70d2e19043d62eeb9df0c3db9972d61f5f854e51a07ed6677a2999 [INFO] running `Command { std: "docker" "start" "-a" "c93c0b7c2a70d2e19043d62eeb9df0c3db9972d61f5f854e51a07ed6677a2999", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.69 [INFO] [stderr] Compiling getrandom v0.1.14 [INFO] [stderr] Compiling ppv-lite86 v0.2.6 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] Compiling rand v0.7.3 [INFO] [stderr] Compiling sorting v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `rand::prelude::*` [INFO] [stdout] --> src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use rand::prelude::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `orig_a_start` [INFO] [stdout] --> src/main.rs:171:17 [INFO] [stdout] | [INFO] [stdout] 171 | let mut orig_a_start = a_start; [INFO] [stdout] | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_orig_a_start` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `orig_a_length` [INFO] [stdout] --> src/main.rs:172:17 [INFO] [stdout] | [INFO] [stdout] 172 | let mut orig_a_length = a_length; [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_orig_a_length` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `items_mut` [INFO] [stdout] --> src/main.rs:199:13 [INFO] [stdout] | [INFO] [stdout] 199 | let items_mut = self.get_vec_mut(); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_items_mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:171:13 [INFO] [stdout] | [INFO] [stdout] 171 | let mut orig_a_start = a_start; [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/main.rs:172:13 [INFO] [stdout] | [INFO] [stdout] 172 | let mut orig_a_length = a_length; [INFO] [stdout] | ----^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:173:13 [INFO] [stdout] | [INFO] [stdout] 173 | let mut orig_b_start = b_start; [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:174:13 [INFO] [stdout] | [INFO] [stdout] 174 | let mut orig_b_length = b_length; [INFO] [stdout] | ----^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `source` is never read [INFO] [stdout] --> src/main.rs:236:17 [INFO] [stdout] | [INFO] [stdout] 236 | let mut source: &mut Vec = &mut vec![]; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `sort` is never read [INFO] [stdout] --> src/main.rs:275:17 [INFO] [stdout] | [INFO] [stdout] 275 | let mut sort: Option> = None; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> src/main.rs:192:9 [INFO] [stdout] | [INFO] [stdout] 192 | drop(items_mut); [INFO] [stdout] | ^^^^^---------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&mut Vec` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dropping_references)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 192 - drop(items_mut); [INFO] [stdout] 192 + let _ = items_mut; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.25s [INFO] running `Command { std: "docker" "inspect" "c93c0b7c2a70d2e19043d62eeb9df0c3db9972d61f5f854e51a07ed6677a2999", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c93c0b7c2a70d2e19043d62eeb9df0c3db9972d61f5f854e51a07ed6677a2999", kill_on_drop: false }` [INFO] [stdout] c93c0b7c2a70d2e19043d62eeb9df0c3db9972d61f5f854e51a07ed6677a2999 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 371eac4a7eff57c6505030cdf1e8eb1251469ade59d4355def29c78aa75d4a0a [INFO] running `Command { std: "docker" "start" "-a" "371eac4a7eff57c6505030cdf1e8eb1251469ade59d4355def29c78aa75d4a0a", kill_on_drop: false }` [INFO] [stderr] Compiling sorting v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `rand::prelude::*` [INFO] [stdout] --> src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use rand::prelude::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `orig_a_start` [INFO] [stdout] --> src/main.rs:171:17 [INFO] [stdout] | [INFO] [stdout] 171 | let mut orig_a_start = a_start; [INFO] [stdout] | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_orig_a_start` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `orig_a_length` [INFO] [stdout] --> src/main.rs:172:17 [INFO] [stdout] | [INFO] [stdout] 172 | let mut orig_a_length = a_length; [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_orig_a_length` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `items_mut` [INFO] [stdout] --> src/main.rs:199:13 [INFO] [stdout] | [INFO] [stdout] 199 | let items_mut = self.get_vec_mut(); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_items_mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:171:13 [INFO] [stdout] | [INFO] [stdout] 171 | let mut orig_a_start = a_start; [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/main.rs:172:13 [INFO] [stdout] | [INFO] [stdout] 172 | let mut orig_a_length = a_length; [INFO] [stdout] | ----^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:173:13 [INFO] [stdout] | [INFO] [stdout] 173 | let mut orig_b_start = b_start; [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:174:13 [INFO] [stdout] | [INFO] [stdout] 174 | let mut orig_b_length = b_length; [INFO] [stdout] | ----^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `source` is never read [INFO] [stdout] --> src/main.rs:236:17 [INFO] [stdout] | [INFO] [stdout] 236 | let mut source: &mut Vec = &mut vec![]; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `sort` is never read [INFO] [stdout] --> src/main.rs:275:17 [INFO] [stdout] | [INFO] [stdout] 275 | let mut sort: Option> = None; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> src/main.rs:192:9 [INFO] [stdout] | [INFO] [stdout] 192 | drop(items_mut); [INFO] [stdout] | ^^^^^---------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&mut Vec` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dropping_references)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 192 - drop(items_mut); [INFO] [stdout] 192 + let _ = items_mut; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.27s [INFO] running `Command { std: "docker" "inspect" "371eac4a7eff57c6505030cdf1e8eb1251469ade59d4355def29c78aa75d4a0a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "371eac4a7eff57c6505030cdf1e8eb1251469ade59d4355def29c78aa75d4a0a", kill_on_drop: false }` [INFO] [stdout] 371eac4a7eff57c6505030cdf1e8eb1251469ade59d4355def29c78aa75d4a0a