[INFO] cloning repository https://github.com/BobyClaws/learn_c3
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BobyClaws/learn_c3" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBobyClaws%2Flearn_c3", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBobyClaws%2Flearn_c3'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a65b486ea9a176ccc210e293d8e0ae15bf5c4877
[INFO] checking BobyClaws/learn_c3 against try#f77b5bc6c7c84df104f86b0dd01d9490e3923fa8 for pr-147834
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBobyClaws%2Flearn_c3" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/BobyClaws/learn_c3
[INFO] finished tweaking git repo https://github.com/BobyClaws/learn_c3
[INFO] tweaked toml for git repo https://github.com/BobyClaws/learn_c3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/BobyClaws/learn_c3 on toolchain f77b5bc6c7c84df104f86b0dd01d9490e3923fa8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/BobyClaws/learn_c3 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" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c65e700dfb76938eb34f649ce81abd5c3a72dfc4d3854fc0c90ce2c3f8fb9426
[INFO] running `Command { std: "docker" "start" "-a" "c65e700dfb76938eb34f649ce81abd5c3a72dfc4d3854fc0c90ce2c3f8fb9426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c65e700dfb76938eb34f649ce81abd5c3a72dfc4d3854fc0c90ce2c3f8fb9426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c65e700dfb76938eb34f649ce81abd5c3a72dfc4d3854fc0c90ce2c3f8fb9426", kill_on_drop: false }`
[INFO] [stdout] c65e700dfb76938eb34f649ce81abd5c3a72dfc4d3854fc0c90ce2c3f8fb9426
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94dc2ce5a8b55a6de67b67664fe3455ef6b6bc3bab2e4e12243b79b32b183405
[INFO] running `Command { std: "docker" "start" "-a" "94dc2ce5a8b55a6de67b67664fe3455ef6b6bc3bab2e4e12243b79b32b183405", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]    Compiling riscv v0.10.0
[INFO] [stderr]    Compiling riscv v0.9.0
[INFO] [stderr]     Checking critical-section v1.1.1
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]     Checking bare-metal v1.0.0
[INFO] [stderr]     Checking r0 v1.0.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling paste v1.0.11
[INFO] [stderr]    Compiling esp32c3 v0.8.1
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling esp-hal-common v0.4.0 (https://github.com/esp-rs/esp-hal#452fde2c)
[INFO] [stderr]     Checking micromath v1.1.1
[INFO] [stderr]     Checking gcd v2.2.0
[INFO] [stderr]    Compiling esp-println v0.3.1
[INFO] [stderr]     Checking embedded-dma v0.2.0
[INFO] [stderr]     Checking fugit v0.3.6
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]    Compiling esp-backtrace v0.4.0
[INFO] [stderr]    Compiling esp32c3-hal v0.4.0 (https://github.com/esp-rs/esp-hal#452fde2c)
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.49/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] [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" "94dc2ce5a8b55a6de67b67664fe3455ef6b6bc3bab2e4e12243b79b32b183405", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94dc2ce5a8b55a6de67b67664fe3455ef6b6bc3bab2e4e12243b79b32b183405", kill_on_drop: false }`
[INFO] [stdout] 94dc2ce5a8b55a6de67b67664fe3455ef6b6bc3bab2e4e12243b79b32b183405
