[INFO] fetching crate tower-vm 0.3.0...
[INFO] checking tower-vm-0.3.0 against master#8a65ee08296b36342bf7c3cdc15312ccbc357227 for pr-142704
[INFO] extracting crate tower-vm 0.3.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate tower-vm 0.3.0 on toolchain 8a65ee08296b36342bf7c3cdc15312ccbc357227
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tower-vm 0.3.0
[INFO] finished tweaking crates.io crate tower-vm 0.3.0
[INFO] tweaked toml for crates.io crate tower-vm 0.3.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c5ba145756e3ce298374531077f0dc1920a1a845070d13816079b4c17459338
[INFO] running `Command { std: "docker" "start" "-a" "4c5ba145756e3ce298374531077f0dc1920a1a845070d13816079b4c17459338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c5ba145756e3ce298374531077f0dc1920a1a845070d13816079b4c17459338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c5ba145756e3ce298374531077f0dc1920a1a845070d13816079b4c17459338", kill_on_drop: false }`
[INFO] [stdout] 4c5ba145756e3ce298374531077f0dc1920a1a845070d13816079b4c17459338
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=forbid" "-e" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d80f85a362447af04e67acbae50cb42e437f4c5d419f6ff4ff746f06e7210103
[INFO] running `Command { std: "docker" "start" "-a" "d80f85a362447af04e67acbae50cb42e437f4c5d419f6ff4ff746f06e7210103", kill_on_drop: false }`
[INFO] [stderr]     Checking tower-vm v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition: `bytecode`
[INFO] [stdout]   --> src/interpreter/machine.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 | macro_rules! bytecode {
[INFO] [stdout]    |              ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of a double negation
[INFO] [stdout]    --> src/interpreter/value.rs:880:40
[INFO] [stdout]     |
[INFO] [stdout] 880 |             let expected = Value::from($op$val);
[INFO] [stdout]     |                                        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 963 |         neg_tests!(i8, -20i8);
[INFO] [stdout]     |         --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: the prefix `--` could be misinterpreted as a decrement operator which exists in other languages
[INFO] [stdout]     = note: use `-= 1` if you meant to decrement the value
[INFO] [stdout]     = note: `#[warn(double_negations)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `unary_test` which comes from the expansion of the macro `neg_tests` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add parentheses for clarity
[INFO] [stdout]     |
[INFO] [stdout] 963 |         neg_tests!(i8, (-20i8));
[INFO] [stdout]     |                        +     +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of a double negation
[INFO] [stdout]    --> src/interpreter/value.rs:880:40
[INFO] [stdout]     |
[INFO] [stdout] 880 |             let expected = Value::from($op$val);
[INFO] [stdout]     |                                        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 969 |         neg_tests!(i16, -1005i16);
[INFO] [stdout]     |         ------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: the prefix `--` could be misinterpreted as a decrement operator which exists in other languages
[INFO] [stdout]     = note: use `-= 1` if you meant to decrement the value
[INFO] [stdout]     = note: this warning originates in the macro `unary_test` which comes from the expansion of the macro `neg_tests` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add parentheses for clarity
[INFO] [stdout]     |
[INFO] [stdout] 969 |         neg_tests!(i16, (-1005i16));
[INFO] [stdout]     |                         +        +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of a double negation
[INFO] [stdout]    --> src/interpreter/value.rs:880:40
[INFO] [stdout]     |
[INFO] [stdout] 880 |             let expected = Value::from($op$val);
[INFO] [stdout]     |                                        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 975 |         neg_tests!(i32, -5000i32);
[INFO] [stdout]     |         ------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: the prefix `--` could be misinterpreted as a decrement operator which exists in other languages
[INFO] [stdout]     = note: use `-= 1` if you meant to decrement the value
[INFO] [stdout]     = note: this warning originates in the macro `unary_test` which comes from the expansion of the macro `neg_tests` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add parentheses for clarity
[INFO] [stdout]     |
[INFO] [stdout] 975 |         neg_tests!(i32, (-5000i32));
[INFO] [stdout]     |                         +        +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of a double negation
[INFO] [stdout]    --> src/interpreter/value.rs:880:40
[INFO] [stdout]     |
[INFO] [stdout] 880 |             let expected = Value::from($op$val);
[INFO] [stdout]     |                                        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 981 |         neg_tests!(i64, -50000i64);
[INFO] [stdout]     |         -------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: the prefix `--` could be misinterpreted as a decrement operator which exists in other languages
[INFO] [stdout]     = note: use `-= 1` if you meant to decrement the value
[INFO] [stdout]     = note: this warning originates in the macro `unary_test` which comes from the expansion of the macro `neg_tests` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add parentheses for clarity
[INFO] [stdout]     |
[INFO] [stdout] 981 |         neg_tests!(i64, (-50000i64));
[INFO] [stdout]     |                         +         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of a double negation
[INFO] [stdout]    --> src/interpreter/value.rs:880:40
[INFO] [stdout]     |
[INFO] [stdout] 880 |             let expected = Value::from($op$val);
[INFO] [stdout]     |                                        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 987 |         neg_tests!(f32, -std::f32::consts::E);
[INFO] [stdout]     |         ------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: the prefix `--` could be misinterpreted as a decrement operator which exists in other languages
[INFO] [stdout]     = note: use `-= 1` if you meant to decrement the value
[INFO] [stdout]     = note: this warning originates in the macro `unary_test` which comes from the expansion of the macro `neg_tests` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add parentheses for clarity
[INFO] [stdout]     |
[INFO] [stdout] 987 |         neg_tests!(f32, (-std::f32::consts::E));
[INFO] [stdout]     |                         +                    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of a double negation
[INFO] [stdout]    --> src/interpreter/value.rs:880:40
[INFO] [stdout]     |
[INFO] [stdout] 880 |             let expected = Value::from($op$val);
[INFO] [stdout]     |                                        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 993 |         neg_tests!(f64, -std::f64::consts::E);
[INFO] [stdout]     |         ------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: the prefix `--` could be misinterpreted as a decrement operator which exists in other languages
[INFO] [stdout]     = note: use `-= 1` if you meant to decrement the value
[INFO] [stdout]     = note: this warning originates in the macro `unary_test` which comes from the expansion of the macro `neg_tests` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add parentheses for clarity
[INFO] [stdout]     |
[INFO] [stdout] 993 |         neg_tests!(f64, (-std::f64::consts::E));
[INFO] [stdout]     |                         +                    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `zero` is never used
[INFO] [stdout]    --> src/interpreter/machine.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 60  | impl Machine {
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn zero(&mut self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start` is never read
[INFO] [stdout]    --> src/interpreter/machine.rs:451:17
[INFO] [stdout]     |
[INFO] [stdout] 451 |         let mut start = vec![];
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "d80f85a362447af04e67acbae50cb42e437f4c5d419f6ff4ff746f06e7210103", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d80f85a362447af04e67acbae50cb42e437f4c5d419f6ff4ff746f06e7210103", kill_on_drop: false }`
[INFO] [stdout] d80f85a362447af04e67acbae50cb42e437f4c5d419f6ff4ff746f06e7210103