[INFO] fetching crate flexstr 0.9.2...
[INFO] checking flexstr-0.9.2 against master#35936c4839dd272646394779d151e060d0f6b3ac for pr-122960-1
[INFO] extracting crate flexstr 0.9.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate flexstr 0.9.2 on toolchain 35936c4839dd272646394779d151e060d0f6b3ac
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35936c4839dd272646394779d151e060d0f6b3ac" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flexstr 0.9.2
[INFO] finished tweaking crates.io crate flexstr 0.9.2
[INFO] tweaked toml for crates.io crate flexstr 0.9.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35936c4839dd272646394779d151e060d0f6b3ac" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35936c4839dd272646394779d151e060d0f6b3ac" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ufmt-macros v0.2.0
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]   Downloaded ufmt-write v0.1.0
[INFO] [stderr]   Downloaded ufmt v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+35936c4839dd272646394779d151e060d0f6b3ac" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f47bd2204070d599539c2cfaf6ff2415e18fe9bff3a0dc3b2f970f80bc2c0849
[INFO] running `Command { std: "docker" "start" "-a" "f47bd2204070d599539c2cfaf6ff2415e18fe9bff3a0dc3b2f970f80bc2c0849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f47bd2204070d599539c2cfaf6ff2415e18fe9bff3a0dc3b2f970f80bc2c0849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f47bd2204070d599539c2cfaf6ff2415e18fe9bff3a0dc3b2f970f80bc2c0849", kill_on_drop: false }`
[INFO] [stdout] f47bd2204070d599539c2cfaf6ff2415e18fe9bff3a0dc3b2f970f80bc2c0849
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+35936c4839dd272646394779d151e060d0f6b3ac" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9bbc3000b56459a2455365c4ce93a9e3a4df4559c16ae2e87bd5adaf6134aa2
[INFO] running `Command { std: "docker" "start" "-a" "d9bbc3000b56459a2455365c4ce93a9e3a4df4559c16ae2e87bd5adaf6134aa2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking flexstr v0.9.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/builder.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use alloc::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/impls.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use alloc::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/storage/inline.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use alloc::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/traits.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use alloc::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 | use alloc::string::String;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `String` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.55
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/builder.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use alloc::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]    --> src/builder.rs:236:9
[INFO] [stdout]     |
[INFO] [stdout] 236 |     use alloc::string::ToString;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `ToString` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/impls.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use alloc::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/storage/inline.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use alloc::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToString` is imported redundantly
[INFO] [stdout]    --> src/storage/inline.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 169 |     use alloc::string::ToString;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `ToString` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/traits.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use alloc::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 | use alloc::string::String;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/35936c4839dd272646394779d151e060d0f6b3ac/library/std/src/prelude/mod.rs:125:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `String` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.89s
[INFO] running `Command { std: "docker" "inspect" "d9bbc3000b56459a2455365c4ce93a9e3a4df4559c16ae2e87bd5adaf6134aa2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9bbc3000b56459a2455365c4ce93a9e3a4df4559c16ae2e87bd5adaf6134aa2", kill_on_drop: false }`
[INFO] [stdout] d9bbc3000b56459a2455365c4ce93a9e3a4df4559c16ae2e87bd5adaf6134aa2