[INFO] fetching crate cmd-macro 0.1.2...
[INFO] checking cmd-macro-0.1.2 against beta for pr-78714
[INFO] extracting crate cmd-macro 0.1.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate cmd-macro 0.1.2 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 crates.io crate cmd-macro 0.1.2
[INFO] finished tweaking crates.io crate cmd-macro 0.1.2
[INFO] tweaked toml for crates.io crate cmd-macro 0.1.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] 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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a99b74101e13e1d220b457775cf577a39f4036b8cf77b6d908a9f20e245d434
[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" "3a99b74101e13e1d220b457775cf577a39f4036b8cf77b6d908a9f20e245d434", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a99b74101e13e1d220b457775cf577a39f4036b8cf77b6d908a9f20e245d434", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a99b74101e13e1d220b457775cf577a39f4036b8cf77b6d908a9f20e245d434", kill_on_drop: false }`
[INFO] [stdout] 3a99b74101e13e1d220b457775cf577a39f4036b8cf77b6d908a9f20e245d434
[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" "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] [stdout] 8db44a67230288643504b4f19df681fa8ee22eba086654c846192cca06833e91
[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" "8db44a67230288643504b4f19df681fa8ee22eba086654c846192cca06833e91", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling boolinator v2.4.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling cmd-derive v0.1.1
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking cmd-macro v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: internal error: could not join spans
[INFO] [stdout]  --> tests/test.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let echo = cmd!(/bin/echo foo).expect("could not execute command");
[INFO] [stdout]   |                     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: internal error: could not join spans
[INFO] [stdout]   --> tests/test.rs:15:22
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let files = cmd!(ls | grep Cargo).expect("could not execute command");
[INFO] [stdout]    |                      ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: internal error: could not join spans
[INFO] [stdout]   --> tests/test.rs:24:22
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let files = cmd!(ls | grep #cargo).expect("could not execute command");
[INFO] [stdout]    |                      ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: internal error: could not join spans
[INFO] [stdout]   --> tests/test.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let echo = cmd!(echo ####1###).expect("could not execute command");
[INFO] [stdout]    |                     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: internal error: could not join spans
[INFO] [stdout]   --> tests/test.rs:41:27
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let echo = cmd!(echo {a | echo b}).expect("could not execute command");
[INFO] [stdout]    |                           ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: internal error: could not join spans
[INFO] [stdout]   --> tests/test.rs:46:32
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let echo_workaround = cmd!(echo #{"{a"} | echo #{"b}"}).expect("could not execute command");
[INFO] [stdout]    |                                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: internal error: could not join spans
[INFO] [stdout]   --> tests/test.rs:54:21
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let echo = cmd!(echo --foo="$HOME :)").expect("could not execute command");
[INFO] [stdout]    |                     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> tests/test.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cmd-macro`
[INFO] [stderr] 
[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" "8db44a67230288643504b4f19df681fa8ee22eba086654c846192cca06833e91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8db44a67230288643504b4f19df681fa8ee22eba086654c846192cca06833e91", kill_on_drop: false }`
[INFO] [stdout] 8db44a67230288643504b4f19df681fa8ee22eba086654c846192cca06833e91