[INFO] fetching crate chemical-balancer 0.0.0...
[INFO] checking chemical-balancer-0.0.0 against master#f25e92bd42b14e45440c0a30a4ed751ea502f430 for pr-127481-1
[INFO] extracting crate chemical-balancer 0.0.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate chemical-balancer 0.0.0 on toolchain f25e92bd42b14e45440c0a30a4ed751ea502f430
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f25e92bd42b14e45440c0a30a4ed751ea502f430" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chemical-balancer 0.0.0
[INFO] finished tweaking crates.io crate chemical-balancer 0.0.0
[INFO] tweaked toml for crates.io crate chemical-balancer 0.0.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f25e92bd42b14e45440c0a30a4ed751ea502f430" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 23 packages to latest compatible versions
[INFO] [stderr]       Adding latexify v0.0.1 (latest: v0.1.0)
[INFO] [stderr]       Adding pex v0.1.18 (latest: v0.2.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f25e92bd42b14e45440c0a30a4ed751ea502f430" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.86
[INFO] [stderr]   Downloaded latexify v0.0.1
[INFO] [stderr]   Downloaded pin-project-lite v0.2.14
[INFO] [stderr]   Downloaded pex v0.1.18
[INFO] [stderr]   Downloaded num-rational v0.4.2
[INFO] [stderr]   Downloaded num-bigint v0.4.6
[INFO] [stderr]   Downloaded quote v1.0.36
[INFO] [stderr]   Downloaded num-iter v0.1.45
[INFO] [stderr]   Downloaded num v0.4.3
[INFO] [stderr]   Downloaded syn v2.0.70
[INFO] [stderr]   Downloaded rationalize v0.2.0
[INFO] [stderr]   Downloaded mathml-core v0.1.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+f25e92bd42b14e45440c0a30a4ed751ea502f430" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a057d48d0c65077b6ab48a57e4cf052fd9f17e17498e2515ece1c73595421da9
[INFO] running `Command { std: "docker" "start" "-a" "a057d48d0c65077b6ab48a57e4cf052fd9f17e17498e2515ece1c73595421da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a057d48d0c65077b6ab48a57e4cf052fd9f17e17498e2515ece1c73595421da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a057d48d0c65077b6ab48a57e4cf052fd9f17e17498e2515ece1c73595421da9", kill_on_drop: false }`
[INFO] [stdout] a057d48d0c65077b6ab48a57e4cf052fd9f17e17498e2515ece1c73595421da9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+f25e92bd42b14e45440c0a30a4ed751ea502f430" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e3c3c625866324ca8b3d9af09b0c08f53fe66c2ed24325364beb86020193334
[INFO] running `Command { std: "docker" "start" "-a" "7e3c3c625866324ca8b3d9af09b0c08f53fe66c2ed24325364beb86020193334", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]     Checking latexify v0.1.0
[INFO] [stderr]     Checking pex v0.1.18
[INFO] [stderr]     Checking latexify v0.0.1
[INFO] [stderr]     Checking mathml-core v0.1.7
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.70
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking rationalize v0.2.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking chemical-balancer v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/chem_atom/display.rs:6:29
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn fmt<W: Write>(&self, f: &mut W) -> std::fmt::Result {
[INFO] [stdout]   |                             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/term/display.rs:62:29
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn fmt<W: Write>(&self, f: &mut W) -> std::fmt::Result {
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/chem_atom/display.rs:6:29
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn fmt<W: Write>(&self, f: &mut W) -> std::fmt::Result {
[INFO] [stdout]   |                             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/term/display.rs:62:29
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn fmt<W: Write>(&self, f: &mut W) -> std::fmt::Result {
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.02s
[INFO] running `Command { std: "docker" "inspect" "7e3c3c625866324ca8b3d9af09b0c08f53fe66c2ed24325364beb86020193334", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e3c3c625866324ca8b3d9af09b0c08f53fe66c2ed24325364beb86020193334", kill_on_drop: false }`
[INFO] [stdout] 7e3c3c625866324ca8b3d9af09b0c08f53fe66c2ed24325364beb86020193334