[INFO] fetching crate a-half 0.1.0...
[INFO] building a-half-0.1.0 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate a-half 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate a-half 0.1.0 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate a-half 0.1.0
[INFO] finished tweaking crates.io crate a-half 0.1.0
[INFO] tweaked toml for crates.io crate a-half 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "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 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f57e7357c6ccc9f9b6743dc898e025f6ef4e93935da4b528080f9e2b92ac1458
[INFO] running `Command { std: "docker" "start" "-a" "f57e7357c6ccc9f9b6743dc898e025f6ef4e93935da4b528080f9e2b92ac1458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f57e7357c6ccc9f9b6743dc898e025f6ef4e93935da4b528080f9e2b92ac1458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f57e7357c6ccc9f9b6743dc898e025f6ef4e93935da4b528080f9e2b92ac1458", kill_on_drop: false }`
[INFO] [stdout] f57e7357c6ccc9f9b6743dc898e025f6ef4e93935da4b528080f9e2b92ac1458
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c0aeccdbe153389a2a22a1079a55c3f39d0abf1c5cc40acd58be8df88c9026b1
[INFO] running `Command { std: "docker" "start" "-a" "c0aeccdbe153389a2a22a1079a55c3f39d0abf1c5cc40acd58be8df88c9026b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.2.6
[INFO] [stderr]    Compiling a-half v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `SIG_MASK` is never used
[INFO] [stdout]   --> src/lib.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const SIG_MASK: u16 = 1023;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `POS_ZERO_BR` is never used
[INFO] [stdout]   --> src/lib.rs:25:7
[INFO] [stdout]    |
[INFO] [stdout] 25 | const POS_ZERO_BR: u16 = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NEG_ZERO_BR` is never used
[INFO] [stdout]   --> src/lib.rs:26:7
[INFO] [stdout]    |
[INFO] [stdout] 26 | const NEG_ZERO_BR: u16 = 32768;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_sig_bits`, `is_subnormal`, and `is_zero` are never used
[INFO] [stdout]   --> src/lib.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl f16 {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn get_sig_bits(self) -> u16 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     fn is_subnormal(self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |     fn is_zero(self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `Command { std: "docker" "inspect" "c0aeccdbe153389a2a22a1079a55c3f39d0abf1c5cc40acd58be8df88c9026b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0aeccdbe153389a2a22a1079a55c3f39d0abf1c5cc40acd58be8df88c9026b1", kill_on_drop: false }`
[INFO] [stdout] c0aeccdbe153389a2a22a1079a55c3f39d0abf1c5cc40acd58be8df88c9026b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a3e3b9e0190e0d71efb593f28d1fa18c9bbd17b67d74831a092f416166c0198
[INFO] running `Command { std: "docker" "start" "-a" "1a3e3b9e0190e0d71efb593f28d1fa18c9bbd17b67d74831a092f416166c0198", kill_on_drop: false }`
[INFO] [stdout] warning: constant `SIG_MASK` is never used
[INFO] [stdout]   --> src/lib.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const SIG_MASK: u16 = 1023;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling a-half v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `POS_ZERO_BR` is never used
[INFO] [stdout]   --> src/lib.rs:25:7
[INFO] [stdout]    |
[INFO] [stdout] 25 | const POS_ZERO_BR: u16 = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NEG_ZERO_BR` is never used
[INFO] [stdout]   --> src/lib.rs:26:7
[INFO] [stdout]    |
[INFO] [stdout] 26 | const NEG_ZERO_BR: u16 = 32768;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_sig_bits`, `is_subnormal`, and `is_zero` are never used
[INFO] [stdout]   --> src/lib.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl f16 {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn get_sig_bits(self) -> u16 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     fn is_subnormal(self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |     fn is_zero(self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SIG_MASK` is never used
[INFO] [stdout]   --> src/lib.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const SIG_MASK: u16 = 1023;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_sig_bits` is never used
[INFO] [stdout]   --> src/lib.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl f16 {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn get_sig_bits(self) -> u16 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "1a3e3b9e0190e0d71efb593f28d1fa18c9bbd17b67d74831a092f416166c0198", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a3e3b9e0190e0d71efb593f28d1fa18c9bbd17b67d74831a092f416166c0198", kill_on_drop: false }`
[INFO] [stdout] 1a3e3b9e0190e0d71efb593f28d1fa18c9bbd17b67d74831a092f416166c0198