[INFO] fetching crate ic-stable-memory-derive 0.4.2...
[INFO] checking ic-stable-memory-derive-0.4.2 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate ic-stable-memory-derive 0.4.2 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate ic-stable-memory-derive 0.4.2 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ic-stable-memory-derive 0.4.2
[INFO] finished tweaking crates.io crate ic-stable-memory-derive 0.4.2
[INFO] tweaked toml for crates.io crate ic-stable-memory-derive 0.4.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.77)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4ce43d9bcbd06c9da86647e2c6da2128ccc01428b8096b2cc0fbf265aa17103
[INFO] running `Command { std: "docker" "start" "-a" "a4ce43d9bcbd06c9da86647e2c6da2128ccc01428b8096b2cc0fbf265aa17103", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4ce43d9bcbd06c9da86647e2c6da2128ccc01428b8096b2cc0fbf265aa17103", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4ce43d9bcbd06c9da86647e2c6da2128ccc01428b8096b2cc0fbf265aa17103", kill_on_drop: false }`
[INFO] [stdout] a4ce43d9bcbd06c9da86647e2c6da2128ccc01428b8096b2cc0fbf265aa17103
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0fd992e604e869077d862ba2dbe82a856e3787771ea9ef8dd40cf285bbbe6a7
[INFO] running `Command { std: "docker" "start" "-a" "b0fd992e604e869077d862ba2dbe82a856e3787771ea9ef8dd40cf285bbbe6a7", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.13
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking proc-macro2 v1.0.86
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]     Checking ic-stable-memory-derive v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `TokenStream`
[INFO] [stdout]  --> src/lib.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 | use proc_macro2::{self, TokenStream};
[INFO] [stdout]   |                         ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `quote::quote`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use quote::quote;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Fields`, `Ident`, and `Index`
[INFO] [stdout]  --> src/lib.rs:8:43
[INFO] [stdout]   |
[INFO] [stdout] 8 | use syn::{parse_macro_input, DeriveInput, Fields, Ident, Index};
[INFO] [stdout]   |                                           ^^^^^^  ^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Index`
[INFO] [stdout]  --> src/candid_as_dyn_size_bytes.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 | use syn::{Generics, Ident, Index};
[INFO] [stdout]   |                            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenStream`
[INFO] [stdout]  --> src/lib.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 | use proc_macro2::{self, TokenStream};
[INFO] [stdout]   |                         ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `quote::quote`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use quote::quote;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Fields`, `Ident`, and `Index`
[INFO] [stdout]  --> src/lib.rs:8:43
[INFO] [stdout]   |
[INFO] [stdout] 8 | use syn::{parse_macro_input, DeriveInput, Fields, Ident, Index};
[INFO] [stdout]   |                                           ^^^^^^  ^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Index`
[INFO] [stdout]  --> src/candid_as_dyn_size_bytes.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 | use syn::{Generics, Ident, Index};
[INFO] [stdout]   |                            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.53s
[INFO] running `Command { std: "docker" "inspect" "b0fd992e604e869077d862ba2dbe82a856e3787771ea9ef8dd40cf285bbbe6a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0fd992e604e869077d862ba2dbe82a856e3787771ea9ef8dd40cf285bbbe6a7", kill_on_drop: false }`
[INFO] [stdout] b0fd992e604e869077d862ba2dbe82a856e3787771ea9ef8dd40cf285bbbe6a7