[INFO] fetching crate form_urlencoded 1.2.1...
[INFO] building form_urlencoded-1.2.1 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate form_urlencoded 1.2.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate form_urlencoded 1.2.1 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 form_urlencoded 1.2.1
[INFO] finished tweaking crates.io crate form_urlencoded 1.2.1
[INFO] tweaked toml for crates.io crate form_urlencoded 1.2.1 written to /workspace/builds/worker-5-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]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 40359f2d500b36fc75bc7a454af2779059b80959c80d46afbf9df4f1d4fba1c4
[INFO] running `Command { std: "docker" "start" "-a" "40359f2d500b36fc75bc7a454af2779059b80959c80d46afbf9df4f1d4fba1c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40359f2d500b36fc75bc7a454af2779059b80959c80d46afbf9df4f1d4fba1c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40359f2d500b36fc75bc7a454af2779059b80959c80d46afbf9df4f1d4fba1c4", kill_on_drop: false }`
[INFO] [stdout] 40359f2d500b36fc75bc7a454af2779059b80959c80d46afbf9df4f1d4fba1c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 4bec9eb6bc1daf915a4d3e9723458cbbbfa71906484b0b0ddb10d251783e23d6
[INFO] running `Command { std: "docker" "start" "-a" "4bec9eb6bc1daf915a4d3e9723458cbbbfa71906484b0b0ddb10d251783e23d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling form_urlencoded v1.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: ambiguous wide pointer comparison, the comparison includes metadata which may not be expected
[INFO] [stdout]    --> src/lib.rs:414:35
[INFO] [stdout]     |
[INFO] [stdout] 414 |                     debug_assert!(raw_utf8 == &*bytes as *const [u8]);
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ambiguous_wide_pointer_comparisons)]` on by default
[INFO] [stdout] help: use `std::ptr::addr_eq` or untyped pointers to only compare their addresses
[INFO] [stdout]     |
[INFO] [stdout] 414 |                     debug_assert!(std::ptr::addr_eq(raw_utf8, &*bytes as *const [u8]));
[INFO] [stdout]     |                                   ++++++++++++++++++        ~                       +
[INFO] [stdout] help: use explicit `std::ptr::eq` method to compare metadata and addresses
[INFO] [stdout]     |
[INFO] [stdout] 414 |                     debug_assert!(std::ptr::eq(raw_utf8, &*bytes as *const [u8]));
[INFO] [stdout]     |                                   +++++++++++++        ~                       +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "4bec9eb6bc1daf915a4d3e9723458cbbbfa71906484b0b0ddb10d251783e23d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bec9eb6bc1daf915a4d3e9723458cbbbfa71906484b0b0ddb10d251783e23d6", kill_on_drop: false }`
[INFO] [stdout] 4bec9eb6bc1daf915a4d3e9723458cbbbfa71906484b0b0ddb10d251783e23d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 3f4e65d0fb62134c668f471c59200f2ed0181c1405859267981d5c91a680f4a6
[INFO] running `Command { std: "docker" "start" "-a" "3f4e65d0fb62134c668f471c59200f2ed0181c1405859267981d5c91a680f4a6", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stdout] warning: ambiguous wide pointer comparison, the comparison includes metadata which may not be expected
[INFO] [stdout]    --> src/lib.rs:414:35
[INFO] [stdout]     |
[INFO] [stdout] 414 |                     debug_assert!(raw_utf8 == &*bytes as *const [u8]);
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ambiguous_wide_pointer_comparisons)]` on by default
[INFO] [stdout] help: use `std::ptr::addr_eq` or untyped pointers to only compare their addresses
[INFO] [stdout]     |
[INFO] [stdout] 414 |                     debug_assert!(std::ptr::addr_eq(raw_utf8, &*bytes as *const [u8]));
[INFO] [stdout]     |                                   ++++++++++++++++++        ~                       +
[INFO] [stdout] help: use explicit `std::ptr::eq` method to compare metadata and addresses
[INFO] [stdout]     |
[INFO] [stdout] 414 |                     debug_assert!(std::ptr::eq(raw_utf8, &*bytes as *const [u8]));
[INFO] [stdout]     |                                   +++++++++++++        ~                       +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3f4e65d0fb62134c668f471c59200f2ed0181c1405859267981d5c91a680f4a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f4e65d0fb62134c668f471c59200f2ed0181c1405859267981d5c91a680f4a6", kill_on_drop: false }`
[INFO] [stdout] 3f4e65d0fb62134c668f471c59200f2ed0181c1405859267981d5c91a680f4a6