[INFO] fetching crate abi_stable_derive_lib 0.6.2...
[INFO] checking abi_stable_derive_lib-0.6.2 against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] extracting crate abi_stable_derive_lib 0.6.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate abi_stable_derive_lib 0.6.2 on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate abi_stable_derive_lib 0.6.2
[INFO] finished tweaking crates.io crate abi_stable_derive_lib 0.6.2
[INFO] tweaked toml for crates.io crate abi_stable_derive_lib 0.6.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded abi_stable_shared v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f62886886a5a5074719cae16ecc93d1eb766da08e803d71e5f98af114f1a71f7
[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" "f62886886a5a5074719cae16ecc93d1eb766da08e803d71e5f98af114f1a71f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f62886886a5a5074719cae16ecc93d1eb766da08e803d71e5f98af114f1a71f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f62886886a5a5074719cae16ecc93d1eb766da08e803d71e5f98af114f1a71f7", kill_on_drop: false }`
[INFO] [stdout] f62886886a5a5074719cae16ecc93d1eb766da08e803d71e5f98af114f1a71f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bced77dd7e85bf1277f99d08003433a257781c29f4f43067fe60575ed0f2b17c
[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" "bced77dd7e85bf1277f99d08003433a257781c29f4f43067fe60575ed0f2b17c", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking typed-arena v1.7.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling core_extensions v0.1.20
[INFO] [stderr]     Checking abi_stable_shared v0.6.0
[INFO] [stderr]     Checking abi_stable_derive_lib v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/stable_abi/attribute_parsing.rs:204:17
[INFO] [stdout]     |
[INFO] [stdout] 204 | /                 &[
[INFO] [stdout] 205 | |                     "Self: ::std::ops::Deref",
[INFO] [stdout] 206 | |                     "<Self as ::std::ops::Deref>::Target:__SharedStableAbi",
[INFO] [stdout] 207 | |                 ].iter()
[INFO] [stdout] 208 | |                  .map(|x| syn::parse_str::<WherePredicate>(x).unwrap() )
[INFO] [stdout] 209 | |                  .extending(&mut this.extra_bounds);
[INFO] [stdout]     | |___________________________________________________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 204 |                 let _ = &[
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/stable_abi/attribute_parsing.rs:204:17
[INFO] [stdout]     |
[INFO] [stdout] 204 | /                 &[
[INFO] [stdout] 205 | |                     "Self: ::std::ops::Deref",
[INFO] [stdout] 206 | |                     "<Self as ::std::ops::Deref>::Target:__SharedStableAbi",
[INFO] [stdout] 207 | |                 ].iter()
[INFO] [stdout] 208 | |                  .map(|x| syn::parse_str::<WherePredicate>(x).unwrap() )
[INFO] [stdout] 209 | |                  .extending(&mut this.extra_bounds);
[INFO] [stdout]     | |___________________________________________________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 204 |                 let _ = &[
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.74s
[INFO] running `Command { std: "docker" "inspect" "bced77dd7e85bf1277f99d08003433a257781c29f4f43067fe60575ed0f2b17c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bced77dd7e85bf1277f99d08003433a257781c29f4f43067fe60575ed0f2b17c", kill_on_drop: false }`
[INFO] [stdout] bced77dd7e85bf1277f99d08003433a257781c29f4f43067fe60575ed0f2b17c