[INFO] fetching crate tinystd 0.2.0...
[INFO] checking tinystd-0.2.0 against master#0f6e1ae67854c3c44726e8376144c16b465fe7c6 for pr-129392
[INFO] extracting crate tinystd 0.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate tinystd 0.2.0 on toolchain 0f6e1ae67854c3c44726e8376144c16b465fe7c6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tinystd 0.2.0
[INFO] finished tweaking crates.io crate tinystd 0.2.0
[INFO] tweaked toml for crates.io crate tinystd 0.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate tinystd 0.2.0 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" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a22bd318d8812472019f9df7f404b5e26fee38b52b0b11ed42bae943614c32e2
[INFO] running `Command { std: "docker" "start" "-a" "a22bd318d8812472019f9df7f404b5e26fee38b52b0b11ed42bae943614c32e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a22bd318d8812472019f9df7f404b5e26fee38b52b0b11ed42bae943614c32e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a22bd318d8812472019f9df7f404b5e26fee38b52b0b11ed42bae943614c32e2", kill_on_drop: false }`
[INFO] [stdout] a22bd318d8812472019f9df7f404b5e26fee38b52b0b11ed42bae943614c32e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c65b9d596def46fe2a857a7106fe8fd2748902558813407af29cc0a5ad400503
[INFO] running `Command { std: "docker" "start" "-a" "c65b9d596def46fe2a857a7106fe8fd2748902558813407af29cc0a5ad400503", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking tinystd v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hashmap.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         for mut pair in &mut self.data {
[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/hashmap.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         for mut pair in &mut self.data {
[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: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/rc.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |             drop(inner);
[INFO] [stdout]    |             ^^^^^-----^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&rc::Shared<T>`
[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] 95 -             drop(inner);
[INFO] [stdout] 95 +             let _ = inner;
[INFO] [stdout]    |
[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/rc.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |             drop(inner);
[INFO] [stdout]    |             ^^^^^-----^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&rc::Shared<T>`
[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] 95 -             drop(inner);
[INFO] [stdout] 95 +             let _ = inner;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `Command { std: "docker" "inspect" "c65b9d596def46fe2a857a7106fe8fd2748902558813407af29cc0a5ad400503", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c65b9d596def46fe2a857a7106fe8fd2748902558813407af29cc0a5ad400503", kill_on_drop: false }`
[INFO] [stdout] c65b9d596def46fe2a857a7106fe8fd2748902558813407af29cc0a5ad400503