[INFO] fetching crate clarity-jupyter-kernel 0.4.0... [INFO] building clarity-jupyter-kernel-0.4.0 against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error [INFO] extracting crate clarity-jupyter-kernel 0.4.0 into /workspace/builds/worker-7-tc2/source [INFO] validating manifest of crates.io crate clarity-jupyter-kernel 0.4.0 on toolchain 8b8eff55bd72abbb57167bc42222a7f91d41cb0d [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate clarity-jupyter-kernel 0.4.0 [INFO] finished tweaking crates.io crate clarity-jupyter-kernel 0.4.0 [INFO] tweaked toml for crates.io crate clarity-jupyter-kernel 0.4.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] crate crates.io crate clarity-jupyter-kernel 0.4.0 already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a1c5dd632118fc24986f0c839233bda7342edd53ad7a1b056bdca53ed3ac048f [INFO] running `Command { std: "docker" "start" "-a" "a1c5dd632118fc24986f0c839233bda7342edd53ad7a1b056bdca53ed3ac048f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a1c5dd632118fc24986f0c839233bda7342edd53ad7a1b056bdca53ed3ac048f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a1c5dd632118fc24986f0c839233bda7342edd53ad7a1b056bdca53ed3ac048f", kill_on_drop: false }` [INFO] [stdout] a1c5dd632118fc24986f0c839233bda7342edd53ad7a1b056bdca53ed3ac048f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 79d57d088e8ab87481b18c9caaad6f736e96fbf750fda8b94ffd4aef2c62bb63 [INFO] running `Command { std: "docker" "start" "-a" "79d57d088e8ab87481b18c9caaad6f736e96fbf750fda8b94ffd4aef2c62bb63", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.85 [INFO] [stderr] Compiling cfg-if v1.0.0 [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Compiling typenum v1.12.0 [INFO] [stderr] Compiling rand_core v0.4.2 [INFO] [stderr] Compiling autocfg v0.1.7 [INFO] [stderr] Compiling proc-macro2 v1.0.24 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling cc v1.0.66 [INFO] [stderr] Compiling syn v1.0.60 [INFO] [stderr] Compiling byte-tools v0.3.1 [INFO] [stderr] Compiling getrandom v0.1.16 [INFO] [stderr] Compiling byteorder v1.4.2 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Compiling pkg-config v0.3.19 [INFO] [stderr] Compiling serde_derive v1.0.123 [INFO] [stderr] Compiling block-padding v0.1.5 [INFO] [stderr] Compiling toml v0.2.1 [INFO] [stderr] Compiling error-chain v0.10.0 [INFO] [stderr] Compiling subtle v1.0.0 [INFO] [stderr] Compiling opaque-debug v0.2.3 [INFO] [stderr] Compiling serde v1.0.123 [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling nix v0.18.0 [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling rand_core v0.3.1 [INFO] [stderr] Compiling metadeps v1.1.2 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling miniz_oxide v0.4.3 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling crunchy v0.2.2 [INFO] [stderr] Compiling ppv-lite86 v0.2.10 [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Compiling num-integer v0.1.44 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling serde_json v1.0.61 [INFO] [stderr] Compiling once_cell v1.5.2 [INFO] [stderr] Compiling zmq-sys v0.11.0 [INFO] [stderr] Compiling quote v1.0.8 [INFO] [stderr] Compiling adler v0.2.3 [INFO] [stderr] Compiling gimli v0.23.0 [INFO] [stderr] Compiling fake-simd v0.1.2 [INFO] [stderr] Compiling thread_local v1.1.3 [INFO] [stderr] Compiling aho-corasick v0.7.15 [INFO] [stderr] Compiling rand_hc v0.1.0 [INFO] [stderr] Compiling rand_xorshift v0.1.1 [INFO] [stderr] Compiling rand_isaac v0.1.1 [INFO] [stderr] Compiling rand_jitter v0.1.4 [INFO] [stderr] Compiling rustc-demangle v0.1.18 [INFO] [stderr] Compiling psm v0.1.12 [INFO] [stderr] Compiling generic-array v0.12.3 [INFO] [stderr] Compiling stacker v0.1.13 [INFO] [stderr] Compiling dirs-sys-next v0.1.2 [INFO] [stderr] Compiling rand_os v0.1.3 [INFO] [stderr] Compiling subtle v2.4.0 [INFO] [stderr] Compiling digest v0.8.1 [INFO] [stderr] Compiling block-buffer v0.7.3 [INFO] [stderr] Compiling crypto-mac v0.7.0 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling dirs-next v1.0.2 [INFO] [stderr] Compiling keccak v0.1.0 [INFO] [stderr] Compiling sha2 v0.8.2 [INFO] [stderr] Compiling object v0.23.0 [INFO] [stderr] Compiling unicode-width v0.1.8 [INFO] [stderr] Compiling hmac v0.7.1 [INFO] [stderr] Compiling zmq v0.9.2 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] Compiling unicode-segmentation v1.7.1 [INFO] [stderr] Compiling hmac-drbg v0.2.0 [INFO] [stderr] Compiling lazy_static v1.4.0 [INFO] [stderr] Compiling arrayref v0.3.6 [INFO] [stderr] Compiling regex-syntax v0.6.22 [INFO] [stderr] Compiling itoa v0.4.7 [INFO] [stderr] Compiling utf8parse v0.2.0 [INFO] [stderr] Compiling sha3 v0.8.2 [INFO] [stderr] Compiling integer-sqrt v0.1.5 [INFO] [stderr] Compiling ripemd160 v0.8.0 [INFO] [stderr] Compiling time v0.1.43 [INFO] [stderr] Compiling rand v0.7.3 [INFO] [stderr] Compiling dirs-sys v0.3.5 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling pico-args v0.3.4 [INFO] [stderr] Compiling ansi_term v0.12.1 [INFO] [stderr] Compiling chrono v0.4.19 [INFO] [stderr] Compiling dirs v2.0.2 [INFO] [stderr] Compiling colored v1.9.3 [INFO] [stderr] Compiling json v0.11.15 [INFO] [stderr] Compiling hex v0.3.2 [INFO] [stderr] Compiling uuid v0.7.4 [INFO] [stderr] Compiling addr2line v0.14.1 [INFO] [stderr] Compiling libsecp256k1 v0.3.5 [INFO] [stderr] Compiling regex v1.4.3 [INFO] [stderr] Compiling backtrace v0.3.56 [INFO] [stderr] Compiling failure v0.1.8 [INFO] [stderr] Compiling rustyline v6.3.0 [INFO] [stderr] Compiling serde_stacker v0.1.4 [INFO] [stderr] Compiling clarity-repl v0.3.0 [INFO] [stderr] Compiling clarity-jupyter-kernel v0.4.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/jupyter/core.rs:81:14 [INFO] [stdout] | [INFO] [stdout] 81 | let (mut context, outputs) = CommandContext::new()?; [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/jupyter/core.rs:138:9 [INFO] [stdout] | [INFO] [stdout] 138 | mut context: CommandContext, [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.51s [INFO] running `Command { std: "docker" "inspect" "79d57d088e8ab87481b18c9caaad6f736e96fbf750fda8b94ffd4aef2c62bb63", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "79d57d088e8ab87481b18c9caaad6f736e96fbf750fda8b94ffd4aef2c62bb63", kill_on_drop: false }` [INFO] [stdout] 79d57d088e8ab87481b18c9caaad6f736e96fbf750fda8b94ffd4aef2c62bb63 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 279ebd0968718cb9a80bcbf2c4a42f16f0f5c86904f14bfdce5e50bc73b9c50f [INFO] running `Command { std: "docker" "start" "-a" "279ebd0968718cb9a80bcbf2c4a42f16f0f5c86904f14bfdce5e50bc73b9c50f", kill_on_drop: false }` [INFO] [stderr] Compiling clarity-jupyter-kernel v0.4.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/jupyter/core.rs:81:14 [INFO] [stdout] | [INFO] [stdout] 81 | let (mut context, outputs) = CommandContext::new()?; [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/jupyter/core.rs:138:9 [INFO] [stdout] | [INFO] [stdout] 138 | mut context: CommandContext, [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.55s [INFO] running `Command { std: "docker" "inspect" "279ebd0968718cb9a80bcbf2c4a42f16f0f5c86904f14bfdce5e50bc73b9c50f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "279ebd0968718cb9a80bcbf2c4a42f16f0f5c86904f14bfdce5e50bc73b9c50f", kill_on_drop: false }` [INFO] [stdout] 279ebd0968718cb9a80bcbf2c4a42f16f0f5c86904f14bfdce5e50bc73b9c50f