[INFO] fetching crate smt2 0.2.0...
[INFO] checking smt2-0.2.0 against try#9cfe725f0995b018340c519db1b2f3cf8a7e0631 for pr-81174
[INFO] extracting crate smt2 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate smt2 0.2.0 on toolchain 9cfe725f0995b018340c519db1b2f3cf8a7e0631
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate smt2 0.2.0
[INFO] finished tweaking crates.io crate smt2 0.2.0
[INFO] tweaked toml for crates.io crate smt2 0.2.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded termion v1.5.6
[INFO] [stderr]   Downloaded utf8-decode v1.0.1
[INFO] [stderr]   Downloaded source-span v2.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe90d46c7ab602597b825bb60b96a7d8e6a832f5970ae332e5c7c9151e2e28c6
[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" "fe90d46c7ab602597b825bb60b96a7d8e6a832f5970ae332e5c7c9151e2e28c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe90d46c7ab602597b825bb60b96a7d8e6a832f5970ae332e5c7c9151e2e28c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe90d46c7ab602597b825bb60b96a7d8e6a832f5970ae332e5c7c9151e2e28c6", kill_on_drop: false }`
[INFO] [stdout] fe90d46c7ab602597b825bb60b96a7d8e6a832f5970ae332e5c7c9151e2e28c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 778ef89de5dab9384eaf65e7a1a4b527955d0ab6a593dcbca69f6bee3e1340c4
[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" "778ef89de5dab9384eaf65e7a1a4b527955d0ab6a593dcbca69f6bee3e1340c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]     Checking utf8-decode v1.0.1
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Checking source-span v2.2.0
[INFO] [stderr]     Checking smt2 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `downgrade_pattern`
[INFO] [stdout]   --> src/client/interface.rs:85:16
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub(crate) fn downgrade_pattern(&self, _pattern: &Typed<Pattern<Self>>) -> ExecResult<Typed<Pattern<Internal<L, C, F>>>, Error<L, C, ...
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `downgrade_sort_declaration`
[INFO] [stdout]    --> src/client/interface.rs:148:16
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub(crate) fn downgrade_sort_declaration(&self, decl: &SortDeclaration<Self>) -> ExecResult<SortDeclaration<Internal<L, C, F>>, Error...
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `upgrade_pattern`
[INFO] [stdout]    --> src/client/interface.rs:220:16
[INFO] [stdout]     |
[INFO] [stdout] 220 |     pub(crate) fn upgrade_pattern(&self, _pattern: &Typed<Pattern<Internal<L, C, F>>>) -> ExecResult<Typed<Pattern<Self>>, Error<L, C, S,...
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `upgrade_abstract_sort`
[INFO] [stdout]    --> src/client/interface.rs:247:16
[INFO] [stdout]     |
[INFO] [stdout] 247 |     pub(crate) fn upgrade_abstract_sort(&self, sort: &AbstractGroundSort<Ident>) -> ExecResult<AbstractGroundSort<S>, Error<L, C, S, F>> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `downgrade_pattern`
[INFO] [stdout]   --> src/client/interface.rs:85:16
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub(crate) fn downgrade_pattern(&self, _pattern: &Typed<Pattern<Self>>) -> ExecResult<Typed<Pattern<Internal<L, C, F>>>, Error<L, C, ...
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `downgrade_sort_declaration`
[INFO] [stdout]    --> src/client/interface.rs:148:16
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub(crate) fn downgrade_sort_declaration(&self, decl: &SortDeclaration<Self>) -> ExecResult<SortDeclaration<Internal<L, C, F>>, Error...
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `upgrade_pattern`
[INFO] [stdout]    --> src/client/interface.rs:220:16
[INFO] [stdout]     |
[INFO] [stdout] 220 |     pub(crate) fn upgrade_pattern(&self, _pattern: &Typed<Pattern<Internal<L, C, F>>>) -> ExecResult<Typed<Pattern<Self>>, Error<L, C, S,...
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `upgrade_abstract_sort`
[INFO] [stdout]    --> src/client/interface.rs:247:16
[INFO] [stdout]     |
[INFO] [stdout] 247 |     pub(crate) fn upgrade_abstract_sort(&self, sort: &AbstractGroundSort<Ident>) -> ExecResult<AbstractGroundSort<S>, Error<L, C, S, F>> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.32s
[INFO] running `Command { std: "docker" "inspect" "778ef89de5dab9384eaf65e7a1a4b527955d0ab6a593dcbca69f6bee3e1340c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "778ef89de5dab9384eaf65e7a1a4b527955d0ab6a593dcbca69f6bee3e1340c4", kill_on_drop: false }`
[INFO] [stdout] 778ef89de5dab9384eaf65e7a1a4b527955d0ab6a593dcbca69f6bee3e1340c4