[INFO] cloning repository https://github.com/uhmarcel/rbase64
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/uhmarcel/rbase64" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuhmarcel%2Frbase64", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuhmarcel%2Frbase64'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 716b8dcd421e9bf724a6859c87fb1c6663b87071
[INFO] checking uhmarcel/rbase64 against try#51de2e90f91fdec6cf64ff542a4e15b9c177a797 for pr-147294
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuhmarcel%2Frbase64" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/uhmarcel/rbase64
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/uhmarcel/rbase64
[INFO] tweaked toml for git repo https://github.com/uhmarcel/rbase64 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/uhmarcel/rbase64 on toolchain 51de2e90f91fdec6cf64ff542a4e15b9c177a797
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+51de2e90f91fdec6cf64ff542a4e15b9c177a797" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/uhmarcel/rbase64 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" "+51de2e90f91fdec6cf64ff542a4e15b9c177a797" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded os_str_bytes v6.4.0
[INFO] [stderr]   Downloaded termtree v0.4.0
[INFO] [stderr]   Downloaded mimalloc v0.1.32
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.81
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.81
[INFO] [stderr]   Downloaded predicates-tree v1.0.6
[INFO] [stderr]   Downloaded assert_cmd v2.0.6
[INFO] [stderr]   Downloaded predicates-core v1.0.4
[INFO] [stderr]   Downloaded predicates v2.1.2
[INFO] [stderr]   Downloaded clap v4.0.23
[INFO] [stderr]   Downloaded cxx-build v1.0.81
[INFO] [stderr]   Downloaded cxx v1.0.81
[INFO] [stderr]   Downloaded bstr v1.0.1
[INFO] [stderr]   Downloaded libmimalloc-sys v0.1.28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+51de2e90f91fdec6cf64ff542a4e15b9c177a797" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94dc231ec65df988b9ca4a2245ad0d4b3961ecd841284cf5a88aeb5e0866b6cc
[INFO] running `Command { std: "docker" "start" "-a" "94dc231ec65df988b9ca4a2245ad0d4b3961ecd841284cf5a88aeb5e0866b6cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94dc231ec65df988b9ca4a2245ad0d4b3961ecd841284cf5a88aeb5e0866b6cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94dc231ec65df988b9ca4a2245ad0d4b3961ecd841284cf5a88aeb5e0866b6cc", kill_on_drop: false }`
[INFO] [stdout] 94dc231ec65df988b9ca4a2245ad0d4b3961ecd841284cf5a88aeb5e0866b6cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+51de2e90f91fdec6cf64ff542a4e15b9c177a797" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16984e7815778bdcf031a32bb39b54dd39d916b615bc1f33e92e853ca3623e5c
[INFO] running `Command { std: "docker" "start" "-a" "16984e7815778bdcf031a32bb39b54dd39d916b615bc1f33e92e853ca3623e5c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.11
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]    Compiling rayon-core v1.10.1
[INFO] [stderr]    Compiling cc v1.0.76
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]     Checking num-traits v0.2.15
[INFO] [stderr]    Compiling serde_json v1.0.87
[INFO] [stderr]     Checking aho-corasick v0.7.19
[INFO] [stderr]     Checking os_str_bytes v6.4.0
[INFO] [stderr]     Checking plotters-backend v0.3.4
[INFO] [stderr]     Checking predicates-core v1.0.4
[INFO] [stderr]     Checking ciborium-io v0.2.0
[INFO] [stderr]     Checking ciborium-ll v0.2.0
[INFO] [stderr]     Checking regex-automata v0.1.10
[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 clap_lex v0.2.4
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]     Checking termtree v0.4.0
[INFO] [stderr]     Checking plotters-svg v0.3.3
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking clap v3.2.23
[INFO] [stderr]     Checking iana-time-zone v0.1.53
[INFO] [stderr]     Checking bstr v1.0.1
[INFO] [stderr]     Checking predicates-tree 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" "16984e7815778bdcf031a32bb39b54dd39d916b615bc1f33e92e853ca3623e5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16984e7815778bdcf031a32bb39b54dd39d916b615bc1f33e92e853ca3623e5c", kill_on_drop: false }`
[INFO] [stdout] 16984e7815778bdcf031a32bb39b54dd39d916b615bc1f33e92e853ca3623e5c