[INFO] fetching crate cmd-macro 0.1.2...
[INFO] testing cmd-macro-0.1.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate cmd-macro 0.1.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate cmd-macro 0.1.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] 5c8bcf82735cc1aa38bb71461b089e6b4184afa64b97a4ff82482210d6d68f68
[INFO] running `Command { std: "docker" "start" "-a" "5c8bcf82735cc1aa38bb71461b089e6b4184afa64b97a4ff82482210d6d68f68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c8bcf82735cc1aa38bb71461b089e6b4184afa64b97a4ff82482210d6d68f68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c8bcf82735cc1aa38bb71461b089e6b4184afa64b97a4ff82482210d6d68f68", kill_on_drop: false }`
[INFO] [stdout] 5c8bcf82735cc1aa38bb71461b089e6b4184afa64b97a4ff82482210d6d68f68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ceaa2c64df9e2fe03991a0d7fb87c2a9184ad5ad32c0846974796eda555855c
[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" "0ceaa2c64df9e2fe03991a0d7fb87c2a9184ad5ad32c0846974796eda555855c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling boolinator v2.4.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling cmd-derive v0.1.1
[INFO] [stderr]    Compiling thiserror v1.0.29
[INFO] [stderr]    Compiling cmd-macro v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.52s
[INFO] running `Command { std: "docker" "inspect" "0ceaa2c64df9e2fe03991a0d7fb87c2a9184ad5ad32c0846974796eda555855c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ceaa2c64df9e2fe03991a0d7fb87c2a9184ad5ad32c0846974796eda555855c", kill_on_drop: false }`
[INFO] [stdout] 0ceaa2c64df9e2fe03991a0d7fb87c2a9184ad5ad32c0846974796eda555855c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--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] 53511c52ea862d23f614917c51f2bee670a610df30ac64c763cd90f529f3215f
[INFO] running `Command { std: "docker" "start" "-a" "53511c52ea862d23f614917c51f2bee670a610df30ac64c763cd90f529f3215f", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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 stable 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` due to 9 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "53511c52ea862d23f614917c51f2bee670a610df30ac64c763cd90f529f3215f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53511c52ea862d23f614917c51f2bee670a610df30ac64c763cd90f529f3215f", kill_on_drop: false }`
[INFO] [stdout] 53511c52ea862d23f614917c51f2bee670a610df30ac64c763cd90f529f3215f