[INFO] fetching crate diffmatchpatch 0.0.4...
[INFO] checking diffmatchpatch-0.0.4 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] extracting crate diffmatchpatch 0.0.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate diffmatchpatch 0.0.4
[INFO] finished tweaking crates.io crate diffmatchpatch 0.0.4
[INFO] tweaked toml for crates.io crate diffmatchpatch 0.0.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate diffmatchpatch 0.0.4 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate diffmatchpatch 0.0.4 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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a780d22338f03bdca97590ca9020e4d487bb8914369e768979804398266b91b
[INFO] running `Command { std: "docker" "start" "-a" "0a780d22338f03bdca97590ca9020e4d487bb8914369e768979804398266b91b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a780d22338f03bdca97590ca9020e4d487bb8914369e768979804398266b91b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a780d22338f03bdca97590ca9020e4d487bb8914369e768979804398266b91b", kill_on_drop: false }`
[INFO] [stdout] 0a780d22338f03bdca97590ca9020e4d487bb8914369e768979804398266b91b
[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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d79f536921dec7732e5c8dd74c50b84c8d3085a38614d30482b319dc4fc93788
[INFO] running `Command { std: "docker" "start" "-a" "d79f536921dec7732e5c8dd74c50b84c8d3085a38614d30482b319dc4fc93788", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde_json v1.0.93
[INFO] [stderr]    Compiling rayon-core v1.10.2
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking itoa v1.0.5
[INFO] [stderr]     Checking os_str_bytes v6.4.1
[INFO] [stderr]     Checking plotters-backend v0.3.4
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking ciborium-io v0.2.0
[INFO] [stderr]     Checking ryu v1.0.12
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking ciborium-ll v0.2.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking plotters-svg v0.3.3
[INFO] [stderr]     Checking percent-encoding v2.2.0
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking diffmatchpatch v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.13
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.51/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] [stderr]     Checking aho-corasick v0.7.20
[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 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `diffs`
[INFO] [stdout]     --> src/lib.rs:1962:35
[INFO] [stdout]      |
[INFO] [stdout] 1962 |     pub fn patch_make2(&mut self, diffs: &mut Vec<Diff>) -> Vec<Patch> {
[INFO] [stdout]      |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_diffs`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d79f536921dec7732e5c8dd74c50b84c8d3085a38614d30482b319dc4fc93788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d79f536921dec7732e5c8dd74c50b84c8d3085a38614d30482b319dc4fc93788", kill_on_drop: false }`
[INFO] [stdout] d79f536921dec7732e5c8dd74c50b84c8d3085a38614d30482b319dc4fc93788