[INFO] cloning repository https://github.com/adilahmeddev/rustlings [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/adilahmeddev/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadilahmeddev%2Frustlings", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadilahmeddev%2Frustlings'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 460229836f53ead4ff1a5f90b4683f19d65eb421 [INFO] checking adilahmeddev/rustlings against try#dd2d87b6cc31907ae305875eb6be399783dc0256 for pr-143929 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadilahmeddev%2Frustlings" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/adilahmeddev/rustlings [INFO] finished tweaking git repo https://github.com/adilahmeddev/rustlings [INFO] tweaked toml for git repo https://github.com/adilahmeddev/rustlings written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/adilahmeddev/rustlings on toolchain dd2d87b6cc31907ae305875eb6be399783dc0256 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dd2d87b6cc31907ae305875eb6be399783dc0256" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/adilahmeddev/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" "+dd2d87b6cc31907ae305875eb6be399783dc0256" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+dd2d87b6cc31907ae305875eb6be399783dc0256" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2e435906dbb1f9a52fbab0f124f490d8cfdc87165061ceaa0b4600e0d003a689 [INFO] running `Command { std: "docker" "start" "-a" "2e435906dbb1f9a52fbab0f124f490d8cfdc87165061ceaa0b4600e0d003a689", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2e435906dbb1f9a52fbab0f124f490d8cfdc87165061ceaa0b4600e0d003a689", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2e435906dbb1f9a52fbab0f124f490d8cfdc87165061ceaa0b4600e0d003a689", kill_on_drop: false }` [INFO] [stdout] 2e435906dbb1f9a52fbab0f124f490d8cfdc87165061ceaa0b4600e0d003a689 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+dd2d87b6cc31907ae305875eb6be399783dc0256" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] d4fe1c9668862a7cea138efd117f5124070df3c035a6f7a01faf6ccf74bccc92 [INFO] running `Command { std: "docker" "start" "-a" "d4fe1c9668862a7cea138efd117f5124070df3c035a6f7a01faf6ccf74bccc92", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.140 [INFO] [stderr] Compiling proc-macro2 v1.0.53 [INFO] [stderr] Compiling quote v1.0.26 [INFO] [stderr] Compiling unicode-ident v1.0.8 [INFO] [stderr] Compiling autocfg v1.1.0 [INFO] [stderr] Compiling serde_derive v1.0.158 [INFO] [stderr] Compiling serde v1.0.158 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Compiling log v0.4.17 [INFO] [stderr] Checking anstyle v1.0.3 [INFO] [stderr] Checking memchr v2.6.3 [INFO] [stderr] Checking cfg-if v0.1.10 [INFO] [stderr] Checking utf8parse v0.2.1 [INFO] [stderr] Compiling portable-atomic v1.4.3 [INFO] [stderr] Checking colorchoice v1.0.0 [INFO] [stderr] Checking regex-syntax v0.6.29 [INFO] [stderr] Checking anstyle-query v1.0.0 [INFO] [stderr] Checking hashbrown v0.14.0 [INFO] [stderr] Checking anstyle-parse v0.2.1 [INFO] [stderr] Checking equivalent v1.0.1 [INFO] [stderr] Checking same-file v1.0.6 [INFO] [stderr] Checking predicates-core v1.0.6 [INFO] [stderr] Checking clap_lex v0.5.1 [INFO] [stderr] Checking unicode-width v0.1.10 [INFO] [stderr] Compiling doc-comment v0.3.3 [INFO] [stderr] Compiling serde_json v1.0.94 [INFO] [stderr] Checking bitflags v1.3.2 [INFO] [stderr] Checking lazy_static v1.4.0 [INFO] [stderr] Checking lazycell v1.3.0 [INFO] [stderr] Checking winnow v0.5.15 [INFO] [stderr] Compiling heck v0.4.1 [INFO] [stderr] Checking strsim v0.10.0 [INFO] [stderr] Checking either v1.9.0 [INFO] [stderr] Checking anstream v0.5.0 [INFO] [stderr] Checking walkdir v2.3.3 [INFO] [stderr] Compiling slab v0.4.8 [INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.53/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] Compiling num-traits v0.2.15 [INFO] [stderr] Checking number_prefix v0.4.0 [INFO] [stderr] Checking normalize-line-endings v0.3.0 [INFO] [stderr] Checking regex-automata v0.3.8 [INFO] [stderr] Checking aho-corasick v0.7.20 [INFO] [stderr] Checking itertools v0.10.5 [INFO] [stderr] Checking difflib v0.4.0 [INFO] [stderr] Checking indexmap v2.0.0 [INFO] [stderr] Checking termtree v0.4.1 [INFO] [stderr] Checking ryu v1.0.13 [INFO] [stderr] Checking itoa v1.0.6 [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" "d4fe1c9668862a7cea138efd117f5124070df3c035a6f7a01faf6ccf74bccc92", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d4fe1c9668862a7cea138efd117f5124070df3c035a6f7a01faf6ccf74bccc92", kill_on_drop: false }` [INFO] [stdout] d4fe1c9668862a7cea138efd117f5124070df3c035a6f7a01faf6ccf74bccc92