[INFO] fetching crate serde_json 1.0.57...
[INFO] checking serde_json-1.0.57 against try#d990716b6a1fdde1300748828a9c9e79dfd0b898 for pr-74846
[INFO] extracting crate serde_json 1.0.57 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate serde_json 1.0.57 on toolchain d990716b6a1fdde1300748828a9c9e79dfd0b898
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_json 1.0.57
[INFO] finished tweaking crates.io crate serde_json 1.0.57
[INFO] tweaked toml for crates.io crate serde_json 1.0.57 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0418582c7633a56c2185598948e9a5d598778fb1c429b011ce30fa1b122ee112
[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" "0418582c7633a56c2185598948e9a5d598778fb1c429b011ce30fa1b122ee112", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0418582c7633a56c2185598948e9a5d598778fb1c429b011ce30fa1b122ee112", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0418582c7633a56c2185598948e9a5d598778fb1c429b011ce30fa1b122ee112", kill_on_drop: false }`
[INFO] [stdout] 0418582c7633a56c2185598948e9a5d598778fb1c429b011ce30fa1b122ee112
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6afbe5cbab50323bd87598bbb187494d4dedcd4f4036b1577d1d45ff1bca4c51
[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" "6afbe5cbab50323bd87598bbb187494d4dedcd4f4036b1577d1d45ff1bca4c51", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling cc v1.0.58
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling serde_json v1.0.57 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling psm v0.1.11
[INFO] [stderr]    Compiling stacker v0.1.11
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]    Compiling automod v0.1.2
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking serde_stacker v0.1.4
[INFO] [stderr]     Checking serde_bytes v0.11.5
[INFO] [stderr]     Checking trybuild v1.0.32
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 51.60s
[INFO] running `Command { std: "docker" "inspect" "6afbe5cbab50323bd87598bbb187494d4dedcd4f4036b1577d1d45ff1bca4c51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6afbe5cbab50323bd87598bbb187494d4dedcd4f4036b1577d1d45ff1bca4c51", kill_on_drop: false }`
[INFO] [stdout] 6afbe5cbab50323bd87598bbb187494d4dedcd4f4036b1577d1d45ff1bca4c51