[INFO] fetching crate yason 0.0.2...
[INFO] checking yason-0.0.2 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate yason 0.0.2 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate yason 0.0.2 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate yason 0.0.2
[INFO] finished tweaking crates.io crate yason 0.0.2
[INFO] tweaked toml for crates.io crate yason 0.0.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 14 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9d325ef1a6d8d94a0ff090e2f5b4c4063f63b3f584ddaae0486923ba4c038c01
[INFO] running `Command { std: "docker" "start" "-a" "9d325ef1a6d8d94a0ff090e2f5b4c4063f63b3f584ddaae0486923ba4c038c01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d325ef1a6d8d94a0ff090e2f5b4c4063f63b3f584ddaae0486923ba4c038c01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d325ef1a6d8d94a0ff090e2f5b4c4063f63b3f584ddaae0486923ba4c038c01", kill_on_drop: false }`
[INFO] [stdout] 9d325ef1a6d8d94a0ff090e2f5b4c4063f63b3f584ddaae0486923ba4c038c01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11507717a19193c8a467ecf7c589ffcaf3fff1e73b68d44d776c0103c4bdcb56
[INFO] running `Command { std: "docker" "start" "-a" "11507717a19193c8a467ecf7c589ffcaf3fff1e73b68d44d776c0103c4bdcb56", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.128
[INFO] [stderr]     Checking stack-buf v0.1.6
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking decimal-rs v0.1.43
[INFO] [stderr]     Checking yason v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/builder/array.rs:187:21
[INFO] [stdout]     |
[INFO] [stdout] 187 |         let bytes = Vec::try_with_capacity(DEFAULT_SIZE)?;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `VecExt::try_with_capacity(...)` to keep using the current method
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(try_with_capacity)]` to the crate attributes to enable `Vec::<T>::try_with_capacity`
[INFO] [stdout]    --> src/lib.rs:181:1
[INFO] [stdout]     |
[INFO] [stdout] 181 + #![feature(try_with_capacity)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/builder/object.rs:258:21
[INFO] [stdout]     |
[INFO] [stdout] 258 |         let bytes = Vec::try_with_capacity(DEFAULT_SIZE)?;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `VecExt::try_with_capacity(...)` to keep using the current method
[INFO] [stdout] help: add `#![feature(try_with_capacity)]` to the crate attributes to enable `Vec::<T>::try_with_capacity`
[INFO] [stdout]    --> src/lib.rs:181:1
[INFO] [stdout]     |
[INFO] [stdout] 181 + #![feature(try_with_capacity)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/builder/array.rs:187:21
[INFO] [stdout]     |
[INFO] [stdout] 187 |         let bytes = Vec::try_with_capacity(DEFAULT_SIZE)?;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `VecExt::try_with_capacity(...)` to keep using the current method
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(try_with_capacity)]` to the crate attributes to enable `Vec::<T>::try_with_capacity`
[INFO] [stdout]    --> src/lib.rs:181:1
[INFO] [stdout]     |
[INFO] [stdout] 181 + #![feature(try_with_capacity)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/builder/object.rs:258:21
[INFO] [stdout]     |
[INFO] [stdout] 258 |         let bytes = Vec::try_with_capacity(DEFAULT_SIZE)?;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `VecExt::try_with_capacity(...)` to keep using the current method
[INFO] [stdout] help: add `#![feature(try_with_capacity)]` to the crate attributes to enable `Vec::<T>::try_with_capacity`
[INFO] [stdout]    --> src/lib.rs:181:1
[INFO] [stdout]     |
[INFO] [stdout] 181 + #![feature(try_with_capacity)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `push_i32` is never used
[INFO] [stdout]   --> src/vec.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait VecExt: Sized {
[INFO] [stdout]    |           ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 15 |     fn push_i32(&mut self, val: i32);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `push_i32` is never used
[INFO] [stdout]   --> src/vec.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait VecExt: Sized {
[INFO] [stdout]    |           ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 15 |     fn push_i32(&mut self, val: i32);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.66s
[INFO] running `Command { std: "docker" "inspect" "11507717a19193c8a467ecf7c589ffcaf3fff1e73b68d44d776c0103c4bdcb56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11507717a19193c8a467ecf7c589ffcaf3fff1e73b68d44d776c0103c4bdcb56", kill_on_drop: false }`
[INFO] [stdout] 11507717a19193c8a467ecf7c589ffcaf3fff1e73b68d44d776c0103c4bdcb56