[INFO] cloning repository https://github.com/davidbarsky/tracing-reproduction
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davidbarsky/tracing-reproduction" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbarsky%2Ftracing-reproduction", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbarsky%2Ftracing-reproduction'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3663f47b17bf5c9f02a73fec6bf623ff562d35bd
[INFO] checking davidbarsky/tracing-reproduction against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbarsky%2Ftracing-reproduction" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/davidbarsky/tracing-reproduction on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/davidbarsky/tracing-reproduction
[INFO] finished tweaking git repo https://github.com/davidbarsky/tracing-reproduction
[INFO] tweaked toml for git repo https://github.com/davidbarsky/tracing-reproduction written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/davidbarsky/tracing-reproduction already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3578afaae40230fb0dc1ca9bb6cdaf35dda7cc599d3a564395e19e61712f452
[INFO] running `Command { std: "docker" "start" "-a" "c3578afaae40230fb0dc1ca9bb6cdaf35dda7cc599d3a564395e19e61712f452", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3578afaae40230fb0dc1ca9bb6cdaf35dda7cc599d3a564395e19e61712f452", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3578afaae40230fb0dc1ca9bb6cdaf35dda7cc599d3a564395e19e61712f452", kill_on_drop: false }`
[INFO] [stdout] c3578afaae40230fb0dc1ca9bb6cdaf35dda7cc599d3a564395e19e61712f452
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ef73ddec0297d29971d530e5894edbc169d79581f9269335cbab9d72b555c4c
[INFO] running `Command { std: "docker" "start" "-a" "4ef73ddec0297d29971d530e5894edbc169d79581f9269335cbab9d72b555c4c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking tracing-core v0.1.7
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling tracing-attributes v0.1.5
[INFO] [stderr]     Checking tracing v0.1.10
[INFO] [stderr]     Checking tracing-reproduction v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the trait bound `Option<&'a Id>: From<Option<Id>>` is not satisfied
[INFO] [stdout]  --> src/main.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     span.follows_from(curr.id());
[INFO] [stdout]   |          ^^^^^^^^^^^^ the trait `From<Option<Id>>` is not implemented for `Option<&'a Id>`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the following implementations were found:
[INFO] [stdout]             <Option<&'a T> as From<&'a Option<T>>>
[INFO] [stdout]             <Option<&'a mut T> as From<&'a mut Option<T>>>
[INFO] [stdout]             <Option<T> as From<T>>
[INFO] [stdout]   = note: required because of the requirements on the impl of `for<'a> Into<Option<&'a Id>>` for `Option<Id>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Option<&'a Id>: From<Option<Id>>` is not satisfied
[INFO] [stdout]  --> src/main.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     span.follows_from(curr.id());
[INFO] [stdout]   |          ^^^^^^^^^^^^ the trait `From<Option<Id>>` is not implemented for `Option<&'a Id>`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the following implementations were found:
[INFO] [stdout]             <Option<&'a T> as From<&'a Option<T>>>
[INFO] [stdout]             <Option<&'a mut T> as From<&'a mut Option<T>>>
[INFO] [stdout]             <Option<T> as From<T>>
[INFO] [stdout]   = note: required because of the requirements on the impl of `for<'a> Into<Option<&'a Id>>` for `Option<Id>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tracing-reproduction`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4ef73ddec0297d29971d530e5894edbc169d79581f9269335cbab9d72b555c4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ef73ddec0297d29971d530e5894edbc169d79581f9269335cbab9d72b555c4c", kill_on_drop: false }`
[INFO] [stdout] 4ef73ddec0297d29971d530e5894edbc169d79581f9269335cbab9d72b555c4c