[INFO] fetching crate pre-rfc3243-libtw2-net 0.1.0...
[INFO] checking pre-rfc3243-libtw2-net-0.1.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate pre-rfc3243-libtw2-net 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate pre-rfc3243-libtw2-net 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 pre-rfc3243-libtw2-net 0.1.0
[INFO] finished tweaking crates.io crate pre-rfc3243-libtw2-net 0.1.0
[INFO] tweaked toml for crates.io crate pre-rfc3243-libtw2-net 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]     Updating crates.io index
[INFO] [stderr]      Locking 42 packages to latest compatible versions
[INFO] [stderr]       Adding aho-corasick v0.5.3 (available: v1.1.3)
[INFO] [stderr]       Adding arrayvec v0.5.2 (available: v0.7.6)
[INFO] [stderr]       Adding env_logger v0.3.5 (available: v0.11.5)
[INFO] [stderr]       Adding itertools v0.4.19 (available: v0.13.0)
[INFO] [stderr]       Adding log v0.3.9 (available: v0.4.22)
[INFO] [stderr]       Adding mac v0.0.2 (available: v0.1.1)
[INFO] [stderr]       Adding memchr v0.1.11 (available: v2.7.4)
[INFO] [stderr]       Adding optional v0.0.12 (available: v0.5.0)
[INFO] [stderr]       Adding quickcheck v0.4.1 (available: v1.0.3)
[INFO] [stderr]       Adding rand v0.3.23 (available: v0.8.5)
[INFO] [stderr]       Adding rand v0.4.6 (available: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (available: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (available: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (available: v0.8.3)
[INFO] [stderr]       Adding regex v0.1.80 (available: v1.10.6)
[INFO] [stderr]       Adding regex-syntax v0.3.9 (available: v0.8.4)
[INFO] [stderr]       Adding thread-id v2.0.0 (available: v4.2.2)
[INFO] [stderr]       Adding thread_local v0.2.7 (available: v1.1.8)
[INFO] [stderr]       Adding utf8-ranges v0.1.3 (available: v1.0.5)
[INFO] [stderr]       Adding winapi v0.2.8 (available: v0.3.9)
[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] 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] fd7253634604cde1f0a4a58396018f904769458db7a91e083d2e5dd4f60339c9
[INFO] running `Command { std: "docker" "start" "-a" "fd7253634604cde1f0a4a58396018f904769458db7a91e083d2e5dd4f60339c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd7253634604cde1f0a4a58396018f904769458db7a91e083d2e5dd4f60339c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd7253634604cde1f0a4a58396018f904769458db7a91e083d2e5dd4f60339c9", kill_on_drop: false }`
[INFO] [stdout] fd7253634604cde1f0a4a58396018f904769458db7a91e083d2e5dd4f60339c9
[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] 813ee9dea2fefb0625ec8fec023f72e7ba896ca7cc5a922b75960ae4d42b24e3
[INFO] running `Command { std: "docker" "start" "-a" "813ee9dea2fefb0625ec8fec023f72e7ba896ca7cc5a922b75960ae4d42b24e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking mac v0.0.2
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]     Checking optional v0.0.12
[INFO] [stderr]     Checking linear-map v1.2.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking warn v0.2.2
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking buffer v0.1.9
[INFO] [stderr]     Checking hexdump v0.1.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking pre-rfc3243-libtw2-common v0.1.0
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking pre-rfc3243-libtw2-huffman v0.1.0
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking quickcheck v0.4.1
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking pre-rfc3243-libtw2-net v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/net.rs:484:75
[INFO] [stdout]     |
[INFO] [stdout] 484 |     pub fn tick<'a, CB: Callback<A>>(&'a mut self, cb: &'a mut CB) -> Tick<A, CB> {
[INFO] [stdout]     |                 -- lifetime `'a` declared here                            ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/net.rs:484:75
[INFO] [stdout]     |
[INFO] [stdout] 484 |     pub fn tick<'a, CB: Callback<A>>(&'a mut self, cb: &'a mut CB) -> Tick<A, CB> {
[INFO] [stdout]     |                 -- lifetime `'a` declared here                            ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.29s
[INFO] running `Command { std: "docker" "inspect" "813ee9dea2fefb0625ec8fec023f72e7ba896ca7cc5a922b75960ae4d42b24e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "813ee9dea2fefb0625ec8fec023f72e7ba896ca7cc5a922b75960ae4d42b24e3", kill_on_drop: false }`
[INFO] [stdout] 813ee9dea2fefb0625ec8fec023f72e7ba896ca7cc5a922b75960ae4d42b24e3