[INFO] fetching crate gen-vec 0.3.0...
[INFO] checking gen-vec-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate gen-vec 0.3.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate gen-vec 0.3.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gen-vec 0.3.0
[INFO] finished tweaking crates.io crate gen-vec 0.3.0
[INFO] tweaked toml for crates.io crate gen-vec 0.3.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 388a5ec71323e5ba248cbac9ac3ddabf97948f9f8a0d94692b9d58199523d6d8
[INFO] running `Command { std: "docker" "start" "-a" "388a5ec71323e5ba248cbac9ac3ddabf97948f9f8a0d94692b9d58199523d6d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "388a5ec71323e5ba248cbac9ac3ddabf97948f9f8a0d94692b9d58199523d6d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "388a5ec71323e5ba248cbac9ac3ddabf97948f9f8a0d94692b9d58199523d6d8", kill_on_drop: false }`
[INFO] [stdout] 388a5ec71323e5ba248cbac9ac3ddabf97948f9f8a0d94692b9d58199523d6d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 897be889f44e7d61079df8b98400f4305ddb438eb262c3a48a267cffd906fc6c
[INFO] running `Command { std: "docker" "start" "-a" "897be889f44e7d61079df8b98400f4305ddb438eb262c3a48a267cffd906fc6c", kill_on_drop: false }`
[INFO] [stderr]     Checking gen-vec v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> src/exposed/gen_vec.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     vec::Vec,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous glob re-exports
[INFO] [stdout]   --> src/exposed/mod.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub use self::gen_vec::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ the name `IntoIter` in the type namespace is first re-exported here
[INFO] [stdout] 23 | pub mod index_allocator;
[INFO] [stdout] 24 | pub use self::index_allocator::*;
[INFO] [stdout]    |         ------------------------ but the name `IntoIter` in the type namespace is also re-exported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ambiguous_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous glob re-exports
[INFO] [stdout]   --> src/exposed/mod.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub use self::gen_vec::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ the name `Iter` in the type namespace is first re-exported here
[INFO] [stdout] 23 | pub mod index_allocator;
[INFO] [stdout] 24 | pub use self::index_allocator::*;
[INFO] [stdout]    |         ------------------------ but the name `Iter` in the type namespace is also re-exported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> src/exposed/index_allocator.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     vec::Vec,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> src/exposed/gen_vec.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     vec::Vec,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous glob re-exports
[INFO] [stdout]   --> src/exposed/mod.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub use self::gen_vec::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ the name `IntoIter` in the type namespace is first re-exported here
[INFO] [stdout] 23 | pub mod index_allocator;
[INFO] [stdout] 24 | pub use self::index_allocator::*;
[INFO] [stdout]    |         ------------------------ but the name `IntoIter` in the type namespace is also re-exported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ambiguous_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous glob re-exports
[INFO] [stdout]   --> src/exposed/mod.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub use self::gen_vec::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ the name `Iter` in the type namespace is first re-exported here
[INFO] [stdout] 23 | pub mod index_allocator;
[INFO] [stdout] 24 | pub use self::index_allocator::*;
[INFO] [stdout]    |         ------------------------ but the name `Iter` in the type namespace is also re-exported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> src/exposed/index_allocator.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     vec::Vec,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/exposed/gen_vec.rs:163:25
[INFO] [stdout]     |
[INFO] [stdout] 163 |             _ => panic!(format!("Index is out of bounds despite internal vec being resized: {:?}", index))
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the `panic!()` macro supports formatting, so there's no need for the `format!()` macro here
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 163 -             _ => panic!(format!("Index is out of bounds despite internal vec being resized: {:?}", index))
[INFO] [stdout] 163 +             _ => panic!("Index is out of bounds despite internal vec being resized: {:?}", index)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/exposed/gen_vec.rs:163:25
[INFO] [stdout]     |
[INFO] [stdout] 163 |             _ => panic!(format!("Index is out of bounds despite internal vec being resized: {:?}", index))
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the `panic!()` macro supports formatting, so there's no need for the `format!()` macro here
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 163 -             _ => panic!(format!("Index is out of bounds despite internal vec being resized: {:?}", index))
[INFO] [stdout] 163 +             _ => panic!("Index is out of bounds despite internal vec being resized: {:?}", index)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "897be889f44e7d61079df8b98400f4305ddb438eb262c3a48a267cffd906fc6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "897be889f44e7d61079df8b98400f4305ddb438eb262c3a48a267cffd906fc6c", kill_on_drop: false }`
[INFO] [stdout] 897be889f44e7d61079df8b98400f4305ddb438eb262c3a48a267cffd906fc6c