[INFO] cloning repository https://github.com/pkabra1/my_rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pkabra1/my_rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpkabra1%2Fmy_rustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpkabra1%2Fmy_rustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4106db24bab89d8d7a0aeb2a7ce52445304afd75
[INFO] checking pkabra1/my_rustlings/4106db24bab89d8d7a0aeb2a7ce52445304afd75 against master#9ba3d315b4b2bea7485071eaf4b2681320cd2a27 for pr-124592
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpkabra1%2Fmy_rustlings" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pkabra1/my_rustlings on toolchain 9ba3d315b4b2bea7485071eaf4b2681320cd2a27
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9ba3d315b4b2bea7485071eaf4b2681320cd2a27" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pkabra1/my_rustlings
[INFO] finished tweaking git repo https://github.com/pkabra1/my_rustlings
[INFO] tweaked toml for git repo https://github.com/pkabra1/my_rustlings written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/pkabra1/my_rustlings 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" "+9ba3d315b4b2bea7485071eaf4b2681320cd2a27" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indicatif v0.17.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9ba3d315b4b2bea7485071eaf4b2681320cd2a27" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 163a7b311f0f34a8ec5ce9148403db22639fc9f2d62ff75c73f1769e6dd81072
[INFO] running `Command { std: "docker" "start" "-a" "163a7b311f0f34a8ec5ce9148403db22639fc9f2d62ff75c73f1769e6dd81072", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "163a7b311f0f34a8ec5ce9148403db22639fc9f2d62ff75c73f1769e6dd81072", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "163a7b311f0f34a8ec5ce9148403db22639fc9f2d62ff75c73f1769e6dd81072", kill_on_drop: false }`
[INFO] [stdout] 163a7b311f0f34a8ec5ce9148403db22639fc9f2d62ff75c73f1769e6dd81072
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9ba3d315b4b2bea7485071eaf4b2681320cd2a27" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] da08c0d005e3872aea427233b5cff146eda00fbd10582801b27c0a7e57d4bc8a
[INFO] running `Command { std: "docker" "start" "-a" "da08c0d005e3872aea427233b5cff146eda00fbd10582801b27c0a7e57d4bc8a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.53
[INFO] [stderr]    Compiling serde_derive v1.0.158
[INFO] [stderr]    Compiling serde v1.0.158
[INFO] [stderr]     Checking memchr v2.6.3
[INFO] [stderr]     Checking anstyle v1.0.3
[INFO] [stderr]     Checking utf8parse v0.2.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking anstyle-query v1.0.0
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking hashbrown v0.14.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]    Compiling portable-atomic v1.4.3
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking net2 v0.2.38
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]     Checking clap_lex v0.5.1
[INFO] [stderr]     Checking anstyle-parse v0.2.1
[INFO] [stderr]     Checking winnow v0.5.15
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]     Checking anstream v0.5.0
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking console v0.15.5
[INFO] [stderr]     Checking walkdir v2.3.3
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking filetime v0.2.20
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking clap_builder v4.4.2
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking number_prefix v0.4.0
[INFO] [stderr]     Checking regex-automata v0.3.8
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.53/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] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking indexmap v2.0.0
[INFO] [stderr]     Checking predicates-tree v1.0.9
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking home v0.5.4
[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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "da08c0d005e3872aea427233b5cff146eda00fbd10582801b27c0a7e57d4bc8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da08c0d005e3872aea427233b5cff146eda00fbd10582801b27c0a7e57d4bc8a", kill_on_drop: false }`
[INFO] [stdout] da08c0d005e3872aea427233b5cff146eda00fbd10582801b27c0a7e57d4bc8a