[INFO] cloning repository https://github.com/danburkert/tracing-json-fmt-repro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danburkert/tracing-json-fmt-repro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanburkert%2Ftracing-json-fmt-repro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanburkert%2Ftracing-json-fmt-repro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1f06c543b8d632587a7953154154e7719424e7f3
[INFO] checking danburkert/tracing-json-fmt-repro against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanburkert%2Ftracing-json-fmt-repro" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danburkert/tracing-json-fmt-repro on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/danburkert/tracing-json-fmt-repro
[INFO] finished tweaking git repo https://github.com/danburkert/tracing-json-fmt-repro
[INFO] tweaked toml for git repo https://github.com/danburkert/tracing-json-fmt-repro written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/danburkert/tracing-json-fmt-repro already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 637c81ea0d6bfab6eaba89be9d08f8e21140ca2b4590f7365b7211b5fe9eea6b
[INFO] running `Command { std: "docker" "start" "-a" "637c81ea0d6bfab6eaba89be9d08f8e21140ca2b4590f7365b7211b5fe9eea6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "637c81ea0d6bfab6eaba89be9d08f8e21140ca2b4590f7365b7211b5fe9eea6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "637c81ea0d6bfab6eaba89be9d08f8e21140ca2b4590f7365b7211b5fe9eea6b", kill_on_drop: false }`
[INFO] [stdout] 637c81ea0d6bfab6eaba89be9d08f8e21140ca2b4590f7365b7211b5fe9eea6b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 857ddb0c278f9a8673d6b0a29f3c92cd2ac07f6970988a80e8260769381968dd
[INFO] running `Command { std: "docker" "start" "-a" "857ddb0c278f9a8673d6b0a29f3c92cd2ac07f6970988a80e8260769381968dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]    Compiling protobuf v2.14.0
[INFO] [stderr]    Compiling prometheus v0.7.0
[INFO] [stderr]     Checking integer-encoding v1.1.5
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking serde_json v1.0.52
[INFO] [stderr]     Checking threadpool v1.8.0
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking num-integer v0.1.42
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking thrift v0.13.0
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking tracing-subscriber v0.2.5
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.10
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]     Checking pin-project v0.4.10
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking opentelemetry v0.4.0
[INFO] [stderr]     Checking tracing-opentelemetry v0.3.1
[INFO] [stderr]     Checking opentelemetry-jaeger v0.3.0
[INFO] [stderr]     Checking tracing-json-fmt-repro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 52.06s
[INFO] running `Command { std: "docker" "inspect" "857ddb0c278f9a8673d6b0a29f3c92cd2ac07f6970988a80e8260769381968dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "857ddb0c278f9a8673d6b0a29f3c92cd2ac07f6970988a80e8260769381968dd", kill_on_drop: false }`
[INFO] [stdout] 857ddb0c278f9a8673d6b0a29f3c92cd2ac07f6970988a80e8260769381968dd