[INFO] fetching crate litecoinlib 0.29.1...
[INFO] checking litecoinlib-0.29.1 against master#ff1737bb00913444173658b4e0b274fd79aabf66 for pr-132712-1
[INFO] extracting crate litecoinlib 0.29.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate litecoinlib 0.29.1 on toolchain ff1737bb00913444173658b4e0b274fd79aabf66
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate litecoinlib 0.29.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate litecoinlib 0.29.1
[INFO] tweaked toml for crates.io crate litecoinlib 0.29.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate litecoinlib 0.29.1 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" "+ff1737bb00913444173658b4e0b274fd79aabf66" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_test v1.0.152
[INFO] [stderr]   Downloaded secp256k1 v0.25.0
[INFO] [stderr]   Downloaded core2 v0.3.3
[INFO] [stderr]   Downloaded bitcoin-internals v0.1.0
[INFO] [stderr]   Downloaded bitcoinconsensus v0.20.2-0.5.0
[INFO] [stderr]   Downloaded secp256k1-sys v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a36a9a86944b34cdfc2696614fbbbf22e80c24ccdb1909b1f2f89e98a5320df
[INFO] running `Command { std: "docker" "start" "-a" "9a36a9a86944b34cdfc2696614fbbbf22e80c24ccdb1909b1f2f89e98a5320df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a36a9a86944b34cdfc2696614fbbbf22e80c24ccdb1909b1f2f89e98a5320df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a36a9a86944b34cdfc2696614fbbbf22e80c24ccdb1909b1f2f89e98a5320df", kill_on_drop: false }`
[INFO] [stdout] 9a36a9a86944b34cdfc2696614fbbbf22e80c24ccdb1909b1f2f89e98a5320df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2af2c4f49a597c9c26e3179a52373094939a803b0a1f22f5c2e4face52644426
[INFO] running `Command { std: "docker" "start" "-a" "2af2c4f49a597c9c26e3179a52373094939a803b0a1f22f5c2e4face52644426", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.108
[INFO] [stderr]    Compiling hex_lit v0.1.1
[INFO] [stderr]    Compiling bitcoin-internals v0.1.0
[INFO] [stderr]     Checking bitcoin_hashes v0.11.0
[INFO] [stderr]    Compiling litecoinlib v0.29.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_json v1.0.93
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling serde_test v1.0.152
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.51/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 bech32 v0.9.1
[INFO] [stderr]     Checking ryu v1.0.12
[INFO] [stderr]     Checking itoa v1.0.5
[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" "2af2c4f49a597c9c26e3179a52373094939a803b0a1f22f5c2e4face52644426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2af2c4f49a597c9c26e3179a52373094939a803b0a1f22f5c2e4face52644426", kill_on_drop: false }`
[INFO] [stdout] 2af2c4f49a597c9c26e3179a52373094939a803b0a1f22f5c2e4face52644426