[INFO] fetching crate serde_json 1.0.58...
[INFO] checking serde_json-1.0.58 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate serde_json 1.0.58 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate serde_json 1.0.58 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_json 1.0.58
[INFO] finished tweaking crates.io crate serde_json 1.0.58
[INFO] tweaked toml for crates.io crate serde_json 1.0.58 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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] 50cdac106104d3affb41fbfc245af6d095a7fd17469f27b223bf0e8aadcb8ab3
[INFO] running `Command { std: "docker" "start" "-a" "50cdac106104d3affb41fbfc245af6d095a7fd17469f27b223bf0e8aadcb8ab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50cdac106104d3affb41fbfc245af6d095a7fd17469f27b223bf0e8aadcb8ab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50cdac106104d3affb41fbfc245af6d095a7fd17469f27b223bf0e8aadcb8ab3", kill_on_drop: false }`
[INFO] [stdout] 50cdac106104d3affb41fbfc245af6d095a7fd17469f27b223bf0e8aadcb8ab3
[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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1068f6daeae0fea2f73240b1fd5a4d2e3c08240e955c1504038c4a8fa7526ea9
[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" "1068f6daeae0fea2f73240b1fd5a4d2e3c08240e955c1504038c4a8fa7526ea9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling serde_json v1.0.58 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling trybuild v1.0.35
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking dissimilar v1.0.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling psm v0.1.11
[INFO] [stderr]    Compiling stacker v0.1.12
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]    Compiling automod v1.0.0
[INFO] [stderr]     Checking serde v1.0.116
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking serde_json v1.0.58
[INFO] [stderr]     Checking serde_stacker v0.1.4
[INFO] [stderr]     Checking serde_bytes v0.11.5
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.67s
[INFO] running `Command { std: "docker" "inspect" "1068f6daeae0fea2f73240b1fd5a4d2e3c08240e955c1504038c4a8fa7526ea9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1068f6daeae0fea2f73240b1fd5a4d2e3c08240e955c1504038c4a8fa7526ea9", kill_on_drop: false }`
[INFO] [stdout] 1068f6daeae0fea2f73240b1fd5a4d2e3c08240e955c1504038c4a8fa7526ea9