[INFO] fetching crate fuzzcheck_json_string_generator 0.1.0...
[INFO] testing fuzzcheck_json_string_generator-0.1.0 against 1.69.0 for beta-1.70-1
[INFO] extracting crate fuzzcheck_json_string_generator 0.1.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate fuzzcheck_json_string_generator 0.1.0 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fuzzcheck_json_string_generator 0.1.0
[INFO] finished tweaking crates.io crate fuzzcheck_json_string_generator 0.1.0
[INFO] tweaked toml for crates.io crate fuzzcheck_json_string_generator 0.1.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fuzzcheck_common v0.12.0
[INFO] [stderr]   Downloaded fuzzcheck_mutators_derive v0.12.0
[INFO] [stderr]   Downloaded fuzzcheck v0.12.1
[INFO] [stderr]   Downloaded nu-ansi-term v0.39.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac2a94bfb7fa5980167a5a3232e17b14ed1f784abb7e1fbdfdfd1dda6b3659db
[INFO] running `Command { std: "docker" "start" "-a" "ac2a94bfb7fa5980167a5a3232e17b14ed1f784abb7e1fbdfdfd1dda6b3659db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac2a94bfb7fa5980167a5a3232e17b14ed1f784abb7e1fbdfdfd1dda6b3659db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac2a94bfb7fa5980167a5a3232e17b14ed1f784abb7e1fbdfdfd1dda6b3659db", kill_on_drop: false }`
[INFO] [stdout] ac2a94bfb7fa5980167a5a3232e17b14ed1f784abb7e1fbdfdfd1dda6b3659db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 614bf97300b86f8affa378cbd2419cffd14608528f606e1be3b83d00052f1d76
[INFO] running `Command { std: "docker" "start" "-a" "614bf97300b86f8affa378cbd2419cffd14608528f606e1be3b83d00052f1d76", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling itoa v1.0.6
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling overload v0.1.1
[INFO] [stderr]    Compiling ryu v1.0.13
[INFO] [stderr]    Compiling nu-ansi-term v0.39.0
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling fuzzcheck_common v0.12.0
[INFO] [stderr]    Compiling md5 v0.7.0
[INFO] [stderr]    Compiling fastrand v1.9.0
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling ahash v0.7.6
[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/fuzzcheck_common-0.12.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(no_coverage)]
[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 `fuzzcheck_common` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "614bf97300b86f8affa378cbd2419cffd14608528f606e1be3b83d00052f1d76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "614bf97300b86f8affa378cbd2419cffd14608528f606e1be3b83d00052f1d76", kill_on_drop: false }`
[INFO] [stdout] 614bf97300b86f8affa378cbd2419cffd14608528f606e1be3b83d00052f1d76
