[INFO] fetching crate playbook 0.4.2...
[INFO] checking playbook-0.4.2 against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] extracting crate playbook 0.4.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate playbook 0.4.2 on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate playbook 0.4.2
[INFO] finished tweaking crates.io crate playbook 0.4.2
[INFO] tweaked toml for crates.io crate playbook 0.4.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mashup-impl v0.1.12
[INFO] [stderr]   Downloaded spin v0.4.10
[INFO] [stderr]   Downloaded fern v0.5.9
[INFO] [stderr]   Downloaded rpds v0.5.0
[INFO] [stderr]   Downloaded nix v0.12.1
[INFO] [stderr]   Downloaded pest_meta v2.1.3
[INFO] [stderr]   Downloaded pest v2.1.3
[INFO] [stderr]   Downloaded ymlctx v0.1.8
[INFO] [stderr]   Downloaded ucd-trie v0.1.3
[INFO] [stderr]   Downloaded mashup v0.1.12
[INFO] [stderr]   Downloaded impersonate v0.0.3
[INFO] [stderr]   Downloaded pest_generator v2.1.3
[INFO] [stderr]   Downloaded pyo3-derive-backend v0.5.4
[INFO] [stderr]   Downloaded pyo3cls v0.5.4
[INFO] [stderr]   Downloaded pyo3 v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 009e1c019ad13bfdf053aa4fe235ad4efd582ee314f308c7950d4e7ae89c2aa9
[INFO] running `Command { std: "docker" "start" "-a" "009e1c019ad13bfdf053aa4fe235ad4efd582ee314f308c7950d4e7ae89c2aa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "009e1c019ad13bfdf053aa4fe235ad4efd582ee314f308c7950d4e7ae89c2aa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "009e1c019ad13bfdf053aa4fe235ad4efd582ee314f308c7950d4e7ae89c2aa9", kill_on_drop: false }`
[INFO] [stdout] 009e1c019ad13bfdf053aa4fe235ad4efd582ee314f308c7950d4e7ae89c2aa9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2554b3a82154ec73edfedf848e2314e726b4f28470a7944052c446c33f24b6a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d2554b3a82154ec73edfedf848e2314e726b4f28470a7944052c446c33f24b6a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]    Compiling nix v0.12.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling cc v1.0.59
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking fern v0.5.9
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling impersonate v0.0.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking rpds v0.5.0
[INFO] [stderr]     Checking ymlctx v0.1.8
[INFO] [stderr]     Checking playbook v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/lang/python.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result::Result`
[INFO] [stdout]  --> src/lang/python.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::result::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Context`, `CtxObj`
[INFO] [stdout]  --> src/lang/python.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ymlctx::context::{Context, CtxObj};
[INFO] [stdout]   |                       ^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TaskErrorSource`, `TaskError`
[INFO] [stdout]  --> src/lang/python.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::{TaskError, TaskErrorSource};
[INFO] [stdout]   |             ^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/lang/python.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::Write; // for flushing stdio
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/lang/python.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result::Result`
[INFO] [stdout]  --> src/lang/python.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::result::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Context`, `CtxObj`
[INFO] [stdout]  --> src/lang/python.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ymlctx::context::{Context, CtxObj};
[INFO] [stdout]   |                       ^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TaskErrorSource`, `TaskError`
[INFO] [stdout]  --> src/lang/python.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::{TaskError, TaskErrorSource};
[INFO] [stdout]   |             ^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/lang/python.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::Write; // for flushing stdio
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/builtins.rs:277:5
[INFO] [stdout]     |
[INFO] [stdout] 276 |     unimplemented!();
[INFO] [stdout]     |     ----------------- any code following this expression is unreachable
[INFO] [stdout] 277 |     let nproc = pool.len();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right`: superseded by `trim_end`
[INFO] [stdout]   --> src/systems/docker.rs:38:33
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let newline_len = id_stdout.trim_right().len();
[INFO] [stdout]    |                                 ^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/builtins.rs:277:5
[INFO] [stdout]     |
[INFO] [stdout] 276 |     unimplemented!();
[INFO] [stdout]     |     ----------------- any code following this expression is unreachable
[INFO] [stdout] 277 |     let nproc = pool.len();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right`: superseded by `trim_end`
[INFO] [stdout]   --> src/systems/docker.rs:38:33
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let newline_len = id_stdout.trim_right().len();
[INFO] [stdout]    |                                 ^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nproc`
[INFO] [stdout]    --> src/builtins.rs:277:9
[INFO] [stdout]     |
[INFO] [stdout] 277 |     let nproc = pool.len();
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_nproc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]    --> src/builtins.rs:275:14
[INFO] [stdout]     |
[INFO] [stdout] 275 | fn fork_pool(grid: Vec<Context>, pool: &Vec<CtxObj>) -> TransientContext {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pool`
[INFO] [stdout]    --> src/builtins.rs:275:34
[INFO] [stdout]     |
[INFO] [stdout] 275 | fn fork_pool(grid: Vec<Context>, pool: &Vec<CtxObj>) -> TransientContext {
[INFO] [stdout]     |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_pool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nproc`
[INFO] [stdout]    --> src/builtins.rs:277:9
[INFO] [stdout]     |
[INFO] [stdout] 277 |     let nproc = pool.len();
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_nproc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grid`
[INFO] [stdout]    --> src/builtins.rs:275:14
[INFO] [stdout]     |
[INFO] [stdout] 275 | fn fork_pool(grid: Vec<Context>, pool: &Vec<CtxObj>) -> TransientContext {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_grid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pool`
[INFO] [stdout]    --> src/builtins.rs:275:34
[INFO] [stdout]     |
[INFO] [stdout] 275 | fn fork_pool(grid: Vec<Context>, pool: &Vec<CtxObj>) -> TransientContext {
[INFO] [stdout]     |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_pool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/ci.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |             let mut metadata = std::fs::metadata(tmpdir.path().to_str().unwrap())
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.72s
[INFO] running `Command { std: "docker" "inspect" "d2554b3a82154ec73edfedf848e2314e726b4f28470a7944052c446c33f24b6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2554b3a82154ec73edfedf848e2314e726b4f28470a7944052c446c33f24b6a", kill_on_drop: false }`
[INFO] [stdout] d2554b3a82154ec73edfedf848e2314e726b4f28470a7944052c446c33f24b6a
