[INFO] fetching crate mvdb 0.3.0...
[INFO] checking mvdb-0.3.0 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate mvdb 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate mvdb 0.3.0 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mvdb 0.3.0
[INFO] finished tweaking crates.io crate mvdb 0.3.0
[INFO] tweaked toml for crates.io crate mvdb 0.3.0 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 23 packages to latest compatible versions
[INFO] [stderr]       Adding addr2line v0.22.0 (latest: v0.24.1)
[INFO] [stderr]       Adding error-chain v0.11.0 (latest: v0.12.4)
[INFO] [stderr]       Adding gimli v0.29.0 (latest: v0.31.0)
[INFO] [stderr]       Adding miniz_oxide v0.7.4 (latest: v0.8.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded error-chain v0.11.0
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ecd1310a0d6dea6791cce0fb6f389dabda14457d7611ea68133792c635678c2
[INFO] running `Command { std: "docker" "start" "-a" "4ecd1310a0d6dea6791cce0fb6f389dabda14457d7611ea68133792c635678c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ecd1310a0d6dea6791cce0fb6f389dabda14457d7611ea68133792c635678c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ecd1310a0d6dea6791cce0fb6f389dabda14457d7611ea68133792c635678c2", kill_on_drop: false }`
[INFO] [stdout] 4ecd1310a0d6dea6791cce0fb6f389dabda14457d7611ea68133792c635678c2
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00965a023a305cc899f67b33f1dd12c7867aa8cc69b0e417106598dbe1f9edf3
[INFO] running `Command { std: "docker" "start" "-a" "00965a023a305cc899f67b33f1dd12c7867aa8cc69b0e417106598dbe1f9edf3", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]     Checking gimli v0.29.0
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]     Checking rustc-demangle v0.1.24
[INFO] [stderr]    Compiling serde_json v1.0.127
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking miniz_oxide v0.7.4
[INFO] [stderr]    Compiling cc v1.1.15
[INFO] [stderr]     Checking object v0.36.3
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.76
[INFO] [stderr]    Compiling backtrace v0.3.73
[INFO] [stderr]     Checking addr2line v0.22.0
[INFO] [stderr]    Compiling serde_derive v1.0.209
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking mvdb v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/mvdb.rs:207:26
[INFO] [stdout]     |
[INFO] [stdout] 207 |         just_write(&inner.deref(), &self.file_path, self.pretty)
[INFO] [stdout]     |                          ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `T` does not implement `Deref`, so calling `deref` on `&T` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/mvdb.rs:207:26
[INFO] [stdout]     |
[INFO] [stdout] 207 |         just_write(&inner.deref(), &self.file_path, self.pretty)
[INFO] [stdout]     |                          ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `T` does not implement `Deref`, so calling `deref` on `&T` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.55s
[INFO] running `Command { std: "docker" "inspect" "00965a023a305cc899f67b33f1dd12c7867aa8cc69b0e417106598dbe1f9edf3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00965a023a305cc899f67b33f1dd12c7867aa8cc69b0e417106598dbe1f9edf3", kill_on_drop: false }`
[INFO] [stdout] 00965a023a305cc899f67b33f1dd12c7867aa8cc69b0e417106598dbe1f9edf3