[INFO] cloning repository https://github.com/chengzhong001/rust-programming
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chengzhong001/rust-programming" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchengzhong001%2Frust-programming", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchengzhong001%2Frust-programming'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e9fda6ebbfb5a8d4daf8978ae8f1264547d7a85e
[INFO] testing chengzhong001/rust-programming against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchengzhong001%2Frust-programming" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/chengzhong001/rust-programming
[INFO] finished tweaking git repo https://github.com/chengzhong001/rust-programming
[INFO] tweaked toml for git repo https://github.com/chengzhong001/rust-programming written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/chengzhong001/rust-programming on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/chengzhong001/rust-programming 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" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 76d2fa7933e99782a269e84559f29d66b9b8236a7e15a57f10d87e091c961c13
[INFO] running `Command { std: "docker" "start" "-a" "76d2fa7933e99782a269e84559f29d66b9b8236a7e15a57f10d87e091c961c13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76d2fa7933e99782a269e84559f29d66b9b8236a7e15a57f10d87e091c961c13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76d2fa7933e99782a269e84559f29d66b9b8236a7e15a57f10d87e091c961c13", kill_on_drop: false }`
[INFO] [stdout] 76d2fa7933e99782a269e84559f29d66b9b8236a7e15a57f10d87e091c961c13
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe133e8af6e581f4283b04bf83be1d72f202e6d7c18ea0141a7a9017f8c76a31
[INFO] running `Command { std: "docker" "start" "-a" "fe133e8af6e581f4283b04bf83be1d72f202e6d7c18ea0141a7a9017f8c76a31", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling hello_macro v0.1.0 (/opt/rustwide/workdir/19-advanced_features/hello_macro)
[INFO] [stderr]    Compiling advanced_features v0.1.0 (/opt/rustwide/workdir/19-advanced_features)
[INFO] [stderr]    Compiling smart_pointer v0.1.0 (/opt/rustwide/workdir/15-smart_pointer)
[INFO] [stderr]    Compiling iterators_and_closures v0.1.0 (/opt/rustwide/workdir/13-iterators_and_closures)
[INFO] [stderr]    Compiling cargo_and_cargo_io v0.1.0 (/opt/rustwide/workdir/14-cargo_and_cargo_io)
[INFO] [stderr]    Compiling oop v0.1.0 (/opt/rustwide/workdir/17-oop)
[INFO] [stderr]    Compiling packages_crate_modules v0.1.0 (/opt/rustwide/workdir/07-packages_crate_modules)
[INFO] [stderr]    Compiling generic_traits_lifetime v0.1.0 (/opt/rustwide/workdir/10-generic_traits_lifetime)
[INFO] [stderr]    Compiling web_server v0.1.0 (/opt/rustwide/workdir/20-web_server)
[INFO] [stderr]    Compiling command_line_program v0.1.0 (/opt/rustwide/workdir/12-command_line_program)
[INFO] [stderr]    Compiling fearless_concurrency v0.1.0 (/opt/rustwide/workdir/16-fearless_concurrency)
[INFO] [stderr]    Compiling structs v0.1.0 (/opt/rustwide/workdir/05-structs)
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling common_programming_concepts v0.1.0 (/opt/rustwide/workdir/03-common_programming_concepts)
[INFO] [stderr]    Compiling pattern_and_matching v0.1.0 (/opt/rustwide/workdir/18-pattern_and_matching)
[INFO] [stderr]    Compiling ownership v0.1.0 (/opt/rustwide/workdir/04-ownership)
[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/rustwide/workdir/01-hello_cargo)
[INFO] [stderr]    Compiling common_collectios v0.1.0 (/opt/rustwide/workdir/08-common_collectios)
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling enums_and_pattern_matching v0.1.0 (/opt/rustwide/workdir/06-enums_and_pattern_matching)
[INFO] [stderr]    Compiling automated_tests v0.1.0 (/opt/rustwide/workdir/11-automated_tests)
[INFO] [stderr]    Compiling error_handling v0.1.0 (/opt/rustwide/workdir/09-error_handling)
[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]    Compiling rand_chacha v0.3.1
[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" "fe133e8af6e581f4283b04bf83be1d72f202e6d7c18ea0141a7a9017f8c76a31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe133e8af6e581f4283b04bf83be1d72f202e6d7c18ea0141a7a9017f8c76a31", kill_on_drop: false }`
[INFO] [stdout] fe133e8af6e581f4283b04bf83be1d72f202e6d7c18ea0141a7a9017f8c76a31