[INFO] fetching crate mdbx 0.0.6...
[INFO] testing mdbx-0.0.6 against 1.59.0 for beta-1.60-1
[INFO] extracting crate mdbx 0.0.6 into /workspace/builds/worker-48/source
[INFO] validating manifest of crates.io crate mdbx 0.0.6 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdbx 0.0.6
[INFO] finished tweaking crates.io crate mdbx 0.0.6
[INFO] tweaked toml for crates.io crate mdbx 0.0.6 written to /workspace/builds/worker-48/source/Cargo.toml
[INFO] crate crates.io crate mdbx 0.0.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4a361176cda9ba3d05c8b77b60e455a0b991f0dd3a846bbeabedf14384217c6a
[INFO] running `Command { std: "docker" "start" "-a" "4a361176cda9ba3d05c8b77b60e455a0b991f0dd3a846bbeabedf14384217c6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a361176cda9ba3d05c8b77b60e455a0b991f0dd3a846bbeabedf14384217c6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a361176cda9ba3d05c8b77b60e455a0b991f0dd3a846bbeabedf14384217c6a", kill_on_drop: false }`
[INFO] [stdout] 4a361176cda9ba3d05c8b77b60e455a0b991f0dd3a846bbeabedf14384217c6a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 46f90404ed352391dd94bc148b2b6cb1a5acb38862de333a9f78820bb9144701
[INFO] running `Command { std: "docker" "start" "-a" "46f90404ed352391dd94bc148b2b6cb1a5acb38862de333a9f78820bb9144701", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling bindgen v0.59.2
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling mdbx v0.0.6 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling mdbx-proc v0.1.1
[INFO] [stderr]    Compiling paste v1.0.6
[INFO] [stderr]    Compiling nom v7.1.0
[INFO] [stderr]    Compiling libloading v0.7.2
[INFO] [stderr]    Compiling os_str_bytes v6.0.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mdbx-proc-0.1.1/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_span)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mdbx-proc` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "46f90404ed352391dd94bc148b2b6cb1a5acb38862de333a9f78820bb9144701", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46f90404ed352391dd94bc148b2b6cb1a5acb38862de333a9f78820bb9144701", kill_on_drop: false }`
[INFO] [stdout] 46f90404ed352391dd94bc148b2b6cb1a5acb38862de333a9f78820bb9144701