[INFO] fetching crate obce-codegen 0.1.0...
[INFO] checking obce-codegen-0.1.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate obce-codegen 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate obce-codegen 0.1.0 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 obce-codegen 0.1.0
[INFO] finished tweaking crates.io crate obce-codegen 0.1.0
[INFO] tweaked toml for crates.io crate obce-codegen 0.1.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 26 packages to latest compatible versions
[INFO] [stderr]       Adding darling v0.14.4 (available: v0.20.10)
[INFO] [stderr]       Adding darling_core v0.14.4 (available: v0.20.10)
[INFO] [stderr]       Adding darling_macro v0.14.4 (available: v0.20.10)
[INFO] [stderr]       Adding generic-array v0.14.7 (available: v1.1.0)
[INFO] [stderr]       Adding itertools v0.10.5 (available: v0.13.0)
[INFO] [stderr]       Adding strsim v0.10.0 (available: v0.11.1)
[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] f0b5aff8b34f9e68a927edfe762318822becbd07ec8b6f4c8a3270f4d635540e
[INFO] running `Command { std: "docker" "start" "-a" "f0b5aff8b34f9e68a927edfe762318822becbd07ec8b6f4c8a3270f4d635540e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0b5aff8b34f9e68a927edfe762318822becbd07ec8b6f4c8a3270f4d635540e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0b5aff8b34f9e68a927edfe762318822becbd07ec8b6f4c8a3270f4d635540e", kill_on_drop: false }`
[INFO] [stdout] f0b5aff8b34f9e68a927edfe762318822becbd07ec8b6f4c8a3270f4d635540e
[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] 64c50bf7a1ec3b290c256b51057fa50b394e25ddf5bb2a8f51932fcdc418b6ab
[INFO] running `Command { std: "docker" "start" "-a" "64c50bf7a1ec3b290c256b51057fa50b394e25ddf5bb2a8f51932fcdc418b6ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking unicode-ident v1.0.13
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking subtle v2.6.1
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking blake2 v0.10.6
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]     Checking tuple v0.5.2
[INFO] [stderr]     Checking darling_core v0.14.4
[INFO] [stderr]    Compiling darling_macro v0.14.4
[INFO] [stderr]     Checking darling v0.14.4
[INFO] [stderr]     Checking obce-codegen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/utils.rs:119:23
[INFO] [stdout]     |
[INFO] [stdout] 119 |             match attr.borrow() {
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `NestedMeta` does not implement `Borrow`, so calling `borrow` on `&NestedMeta` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 119 -             match attr.borrow() {
[INFO] [stdout] 119 +             match attr {
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `NestedMeta`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/syn-1.0.109/src/macros.rs:170:26
[INFO] [stdout]     |
[INFO] [stdout] 170 |         $mac!([$(#[$m])* #[derive(Clone)]
[INFO] [stdout]     |                          ++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/utils.rs:119:23
[INFO] [stdout]     |
[INFO] [stdout] 119 |             match attr.borrow() {
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `NestedMeta` does not implement `Borrow`, so calling `borrow` on `&NestedMeta` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 119 -             match attr.borrow() {
[INFO] [stdout] 119 +             match attr {
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `NestedMeta`, implement `Clone` for it
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/syn-1.0.109/src/macros.rs:170:26
[INFO] [stdout]     |
[INFO] [stdout] 170 |         $mac!([$(#[$m])* #[derive(Clone)]
[INFO] [stdout]     |                          ++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.42s
[INFO] running `Command { std: "docker" "inspect" "64c50bf7a1ec3b290c256b51057fa50b394e25ddf5bb2a8f51932fcdc418b6ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64c50bf7a1ec3b290c256b51057fa50b394e25ddf5bb2a8f51932fcdc418b6ab", kill_on_drop: false }`
[INFO] [stdout] 64c50bf7a1ec3b290c256b51057fa50b394e25ddf5bb2a8f51932fcdc418b6ab