[INFO] fetching crate stackstring 0.3.1...
[INFO] checking stackstring-0.3.1 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] extracting crate stackstring 0.3.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate stackstring 0.3.1 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stackstring 0.3.1
[INFO] finished tweaking crates.io crate stackstring 0.3.1
[INFO] tweaked toml for crates.io crate stackstring 0.3.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate stackstring 0.3.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rkyv v0.7.39
[INFO] [stderr]   Downloaded bytecheck_derive v0.6.9
[INFO] [stderr]   Downloaded bytecheck v0.6.9
[INFO] [stderr]   Downloaded rend v0.3.6
[INFO] [stderr]   Downloaded rkyv_derive v0.7.39
[INFO] [stderr]   Downloaded serde_derive v1.0.149
[INFO] [stderr]   Downloaded serde v1.0.149
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ca6d3ab788976ad9e2ffcbedc4fdddb8efe83bc9043b1a3fa125a34adcfce74
[INFO] running `Command { std: "docker" "start" "-a" "5ca6d3ab788976ad9e2ffcbedc4fdddb8efe83bc9043b1a3fa125a34adcfce74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ca6d3ab788976ad9e2ffcbedc4fdddb8efe83bc9043b1a3fa125a34adcfce74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ca6d3ab788976ad9e2ffcbedc4fdddb8efe83bc9043b1a3fa125a34adcfce74", kill_on_drop: false }`
[INFO] [stdout] 5ca6d3ab788976ad9e2ffcbedc4fdddb8efe83bc9043b1a3fa125a34adcfce74
[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" "-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28fc5510bdc1da5f434005e52c9f018a60fc90e931e0b16707aed7d6565b5f09
[INFO] running `Command { std: "docker" "start" "-a" "28fc5510bdc1da5f434005e52c9f018a60fc90e931e0b16707aed7d6565b5f09", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]    Compiling serde_derive v1.0.149
[INFO] [stderr]    Compiling serde v1.0.149
[INFO] [stderr]    Compiling serde_json v1.0.89
[INFO] [stderr]     Checking itoa v1.0.4
[INFO] [stderr]     Checking ryu v1.0.11
[INFO] [stderr]     Checking stackstring v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `PartialEq` is imported redundantly
[INFO] [stdout]  --> src/string.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 |     cmp::{Eq, Ord, PartialEq, PartialOrd},
[INFO] [stdout]   |                    ^^^^^^^^^
[INFO] [stdout]  --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `PartialEq` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.47/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "28fc5510bdc1da5f434005e52c9f018a60fc90e931e0b16707aed7d6565b5f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28fc5510bdc1da5f434005e52c9f018a60fc90e931e0b16707aed7d6565b5f09", kill_on_drop: false }`
[INFO] [stdout] 28fc5510bdc1da5f434005e52c9f018a60fc90e931e0b16707aed7d6565b5f09
[INFO] checking stackstring-0.3.1 against try#36dbcaee1a55543dfc181be52a69d99ff46ff62f for pr-122960-3
[INFO] extracting crate stackstring 0.3.1 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate stackstring 0.3.1 on toolchain 36dbcaee1a55543dfc181be52a69d99ff46ff62f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stackstring 0.3.1
[INFO] finished tweaking crates.io crate stackstring 0.3.1
[INFO] tweaked toml for crates.io crate stackstring 0.3.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate stackstring 0.3.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab8abbf7cb25970c5645b615742bc588a6a2b65dccad557a823c11e843972fcc
[INFO] running `Command { std: "docker" "start" "-a" "ab8abbf7cb25970c5645b615742bc588a6a2b65dccad557a823c11e843972fcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab8abbf7cb25970c5645b615742bc588a6a2b65dccad557a823c11e843972fcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab8abbf7cb25970c5645b615742bc588a6a2b65dccad557a823c11e843972fcc", kill_on_drop: false }`
[INFO] [stdout] ab8abbf7cb25970c5645b615742bc588a6a2b65dccad557a823c11e843972fcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "-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" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3916eb0f9dc9f5cafd47f5af32a2adc84375a34abd37ac33c6ec59892016b04b
[INFO] running `Command { std: "docker" "start" "-a" "3916eb0f9dc9f5cafd47f5af32a2adc84375a34abd37ac33c6ec59892016b04b", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] skipping non-2021 edition `2018`
[INFO] running `Command { std: "docker" "inspect" "3916eb0f9dc9f5cafd47f5af32a2adc84375a34abd37ac33c6ec59892016b04b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3916eb0f9dc9f5cafd47f5af32a2adc84375a34abd37ac33c6ec59892016b04b", kill_on_drop: false }`
[INFO] [stdout] 3916eb0f9dc9f5cafd47f5af32a2adc84375a34abd37ac33c6ec59892016b04b