[INFO] fetching crate base256 0.4.2...
[INFO] testing base256-0.4.2 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate base256 0.4.2 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate base256 0.4.2
[INFO] finished tweaking crates.io crate base256 0.4.2
[INFO] tweaked toml for crates.io crate base256 0.4.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate base256 0.4.2 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate base256 0.4.2 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 870962b8ca858047db233be7b927f222ad143665bc5a51790534b0e2e7fd0376
[INFO] running `Command { std: "docker" "start" "-a" "870962b8ca858047db233be7b927f222ad143665bc5a51790534b0e2e7fd0376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "870962b8ca858047db233be7b927f222ad143665bc5a51790534b0e2e7fd0376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "870962b8ca858047db233be7b927f222ad143665bc5a51790534b0e2e7fd0376", kill_on_drop: false }`
[INFO] [stdout] 870962b8ca858047db233be7b927f222ad143665bc5a51790534b0e2e7fd0376
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be1cd285ab308aafb7b943b83dc772b4617400fb29f81e7ff04da9f30512675d
[INFO] running `Command { std: "docker" "start" "-a" "be1cd285ab308aafb7b943b83dc772b4617400fb29f81e7ff04da9f30512675d", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling os_str_bytes v6.4.1
[INFO] [stderr]    Compiling anyhow v1.0.69
[INFO] [stderr]    Compiling arrayvec v0.7.2
[INFO] [stderr]    Compiling once_cell v1.17.0
[INFO] [stderr]    Compiling base256 v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[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] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> build.rs:161:42
[INFO] [stdout]     |
[INFO] [stdout] 161 | fn create_wl_decode_entries(words_lower: &[String]) -> Vec<(usize, Vec<WordlistDecodeEntry>)> {
[INFO] [stdout]     |                                          ^^^^^^^^^                     ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                          |
[INFO] [stdout]     |                                          the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 161 | fn create_wl_decode_entries(words_lower: &[String]) -> Vec<(usize, Vec<WordlistDecodeEntry<'_>>)> {
[INFO] [stdout]     |                                                                                           ++++
[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 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "be1cd285ab308aafb7b943b83dc772b4617400fb29f81e7ff04da9f30512675d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be1cd285ab308aafb7b943b83dc772b4617400fb29f81e7ff04da9f30512675d", kill_on_drop: false }`
[INFO] [stdout] be1cd285ab308aafb7b943b83dc772b4617400fb29f81e7ff04da9f30512675d