[INFO] fetching crate mutringbuf 0.4.2...
[INFO] checking mutringbuf-0.4.2 against master#d93f678fa55842cccd2f091deccd93e9494b3764 for pr-138844
[INFO] extracting crate mutringbuf 0.4.2 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate mutringbuf 0.4.2 on toolchain d93f678fa55842cccd2f091deccd93e9494b3764
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mutringbuf 0.4.2
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate mutringbuf 0.4.2
[INFO] tweaked toml for crates.io crate mutringbuf 0.4.2 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate mutringbuf 0.4.2 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" "+d93f678fa55842cccd2f091deccd93e9494b3764" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded iai-callgrind-macros v0.5.0
[INFO] [stderr]   Downloaded iai-callgrind v0.14.0
[INFO] [stderr]   Downloaded iai-callgrind-runner v0.14.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 556d4445ce78fe1a48c1ce13b20e6bf6063128c104f8fea5357ee55e68deb8c0
[INFO] running `Command { std: "docker" "start" "-a" "556d4445ce78fe1a48c1ce13b20e6bf6063128c104f8fea5357ee55e68deb8c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "556d4445ce78fe1a48c1ce13b20e6bf6063128c104f8fea5357ee55e68deb8c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "556d4445ce78fe1a48c1ce13b20e6bf6063128c104f8fea5357ee55e68deb8c0", kill_on_drop: false }`
[INFO] [stdout] 556d4445ce78fe1a48c1ce13b20e6bf6063128c104f8fea5357ee55e68deb8c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22f5a14d81d579b26eb8d283f1aa9bc0d28bb998ab70766c487db7ef2515cc60
[INFO] running `Command { std: "docker" "start" "-a" "22f5a14d81d579b26eb8d283f1aa9bc0d28bb998ab70766c487db7ef2515cc60", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.16
[INFO] [stderr]    Compiling serde v1.0.217
[INFO] [stderr]     Checking pin-project-lite v0.2.16
[INFO] [stderr]    Compiling serde_json v1.0.138
[INFO] [stderr]    Compiling itoa v1.0.14
[INFO] [stderr]    Compiling ryu v1.0.19
[INFO] [stderr]    Compiling iai-callgrind-runner v0.14.0
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]     Checking tokio v1.43.0
[INFO] [stderr]    Compiling iai-callgrind v0.14.0
[INFO] [stderr]     Checking bytes v1.9.0
[INFO] [stderr]     Checking mutringbuf v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.96
[INFO] [stderr]    Compiling proc-macro-error-attr2 v2.0.0
[INFO] [stderr]     Checking tokio-stream v0.1.17
[INFO] [stderr]    Compiling proc-macro-error2 v2.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.217
[INFO] [stderr]    Compiling derive_more-impl v1.0.0
[INFO] [stderr]    Compiling async-stream-impl v0.3.6
[INFO] [stderr]     Checking async-stream v0.3.6
[INFO] [stderr]     Checking tokio-test v0.4.4
[INFO] [stderr]    Compiling derive_more v1.0.0
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]    Compiling iai-callgrind-macros v0.5.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 32.07s
[INFO] running `Command { std: "docker" "inspect" "22f5a14d81d579b26eb8d283f1aa9bc0d28bb998ab70766c487db7ef2515cc60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22f5a14d81d579b26eb8d283f1aa9bc0d28bb998ab70766c487db7ef2515cc60", kill_on_drop: false }`
[INFO] [stdout] 22f5a14d81d579b26eb8d283f1aa9bc0d28bb998ab70766c487db7ef2515cc60