[INFO] fetching crate ic-stable-memory 0.2.3...
[INFO] checking ic-stable-memory-0.2.3 against master#2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4 for pr-84385
[INFO] extracting crate ic-stable-memory 0.2.3 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate ic-stable-memory 0.2.3 on toolchain 2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ic-stable-memory 0.2.3
[INFO] finished tweaking crates.io crate ic-stable-memory 0.2.3
[INFO] tweaked toml for crates.io crate ic-stable-memory 0.2.3 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ic-cdk v0.5.7
[INFO] [stderr]   Downloaded speedy-derive v0.8.3
[INFO] [stderr]   Downloaded speedy v0.8.3
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[INFO] [stdout] 3ccd1c3d8b8892aa1c8d9ae7e1c3a6ef660123d062e758e2a5afc60568e4fa07
[INFO] running `Command { std: "docker" "start" "-a" "3ccd1c3d8b8892aa1c8d9ae7e1c3a6ef660123d062e758e2a5afc60568e4fa07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ccd1c3d8b8892aa1c8d9ae7e1c3a6ef660123d062e758e2a5afc60568e4fa07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ccd1c3d8b8892aa1c8d9ae7e1c3a6ef660123d062e758e2a5afc60568e4fa07", kill_on_drop: false }`
[INFO] [stdout] 3ccd1c3d8b8892aa1c8d9ae7e1c3a6ef660123d062e758e2a5afc60568e4fa07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34d4e664fd0903d0e292d6b090770e61a41f5ea1aa059c775ede87957b4bdd3b
[INFO] running `Command { std: "docker" "start" "-a" "34d4e664fd0903d0e292d6b090770e61a41f5ea1aa059c775ede87957b4bdd3b", kill_on_drop: false }`
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[INFO] [stderr]     Checking ic-stable-memory v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Readable`, `Writable`
[INFO] [stdout]  --> src/utils/mod.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | use speedy::{Readable, Writable};
[INFO] [stdout]   |              ^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/utils/mem_context.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Readable`, `Writable`
[INFO] [stdout]  --> src/utils/mod.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | use speedy::{Readable, Writable};
[INFO] [stdout]   |              ^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/utils/mem_context.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]   --> src/utils/phantom_data.rs:17:36
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn read_from<R: Reader<'a, C>>(reader: &mut R) -> Result<Self, <C as speedy::Context>::Error> {
[INFO] [stdout]    |                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/utils/phantom_data.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         writer: &mut W,
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]   --> src/utils/phantom_data.rs:17:36
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn read_from<R: Reader<'a, C>>(reader: &mut R) -> Result<Self, <C as speedy::Context>::Error> {
[INFO] [stdout]    |                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/utils/phantom_data.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         writer: &mut W,
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `now_milli` is never used
[INFO] [stdout]   --> src/benchmarks/mod.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn now_milli() -> u128 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `btree_to_sorted_vec` is never used
[INFO] [stdout]    --> src/collections/btree_map.rs:564:4
[INFO] [stdout]     |
[INFO] [stdout] 564 | fn btree_to_sorted_vec<
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_btree` is never used
[INFO] [stdout]    --> src/collections/btree_map.rs:589:4
[INFO] [stdout]     |
[INFO] [stdout] 589 | fn print_btree<
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_btree_level` is never used
[INFO] [stdout]    --> src/collections/btree_map.rs:620:4
[INFO] [stdout]     |
[INFO] [stdout] 620 | fn print_btree_level<
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]   --> src/primitive/s_slice.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct SSlice<T> {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 21 |     pub(crate) ptr: u64,
[INFO] [stdout] 22 |     data: SPhantomData<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]   --> src/primitive/s_slice.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct SSlice<T> {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 21 |     pub(crate) ptr: u64,
[INFO] [stdout] 22 |     data: SPhantomData<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 02s
[INFO] running `Command { std: "docker" "inspect" "34d4e664fd0903d0e292d6b090770e61a41f5ea1aa059c775ede87957b4bdd3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34d4e664fd0903d0e292d6b090770e61a41f5ea1aa059c775ede87957b4bdd3b", kill_on_drop: false }`
[INFO] [stdout] 34d4e664fd0903d0e292d6b090770e61a41f5ea1aa059c775ede87957b4bdd3b