[INFO] cloning repository https://github.com/0xcrust/falcon
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/0xcrust/falcon" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xcrust%2Ffalcon", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xcrust%2Ffalcon'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 22efbfa2fd7b9115bec31ac5e4e8aee62944ae71
[INFO] checking 0xcrust/falcon against try#f70ee28831acc074c109afab32d287057c3eca46 for pr-149389
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xcrust%2Ffalcon" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/0xcrust/falcon
[INFO] finished tweaking git repo https://github.com/0xcrust/falcon
[INFO] tweaked toml for git repo https://github.com/0xcrust/falcon written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/0xcrust/falcon on toolchain f70ee28831acc074c109afab32d287057c3eca46
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f70ee28831acc074c109afab32d287057c3eca46" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/0xcrust/falcon 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" "+f70ee28831acc074c109afab32d287057c3eca46" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+f70ee28831acc074c109afab32d287057c3eca46" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff2d9a226f3e74d7448504b8210047dfe2963d8530729b42d14d9c74317bca53
[INFO] running `Command { std: "docker" "start" "-a" "ff2d9a226f3e74d7448504b8210047dfe2963d8530729b42d14d9c74317bca53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff2d9a226f3e74d7448504b8210047dfe2963d8530729b42d14d9c74317bca53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff2d9a226f3e74d7448504b8210047dfe2963d8530729b42d14d9c74317bca53", kill_on_drop: false }`
[INFO] [stdout] ff2d9a226f3e74d7448504b8210047dfe2963d8530729b42d14d9c74317bca53
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+f70ee28831acc074c109afab32d287057c3eca46" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25429ef0fff624c1982cfecacd9057299494d7bbb72805089d7bffafc18c2520
[INFO] running `Command { std: "docker" "start" "-a" "25429ef0fff624c1982cfecacd9057299494d7bbb72805089d7bffafc18c2520", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]     Checking futures-sink v0.3.25
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]    Compiling cc v1.0.76
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]     Checking futures-io v0.3.25
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking itoa v1.0.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.30
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]     Checking percent-encoding v2.2.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking form_urlencoded v1.1.0
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling serde_derive v1.0.147
[INFO] [stderr]    Compiling serde v1.0.147
[INFO] [stderr]     Checking copyless v0.1.5
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling async-trait v0.1.58
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/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] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking aho-corasick v0.7.19
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling serde_json v1.0.87
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]     Checking ryu v1.0.11
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]    Compiling rustls v0.20.7
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking sha1_smol v1.0.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking num_cpus v1.14.0
[INFO] [stderr]     Checking net2 v0.2.38
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking idna v0.3.0
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking socket2 v0.4.7
[INFO] [stderr]     Checking mio v0.8.5
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]     Checking threadpool v1.8.1
[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" "25429ef0fff624c1982cfecacd9057299494d7bbb72805089d7bffafc18c2520", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25429ef0fff624c1982cfecacd9057299494d7bbb72805089d7bffafc18c2520", kill_on_drop: false }`
[INFO] [stdout] 25429ef0fff624c1982cfecacd9057299494d7bbb72805089d7bffafc18c2520
