[INFO] cloning repository https://github.com/basaandewiel/ditto_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/basaandewiel/ditto_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbasaandewiel%2Fditto_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbasaandewiel%2Fditto_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 69a46562d86aa8ab552f3ec100e3cfbe87e76ffe
[INFO] checking basaandewiel/ditto_rust against try#1f5783cbeb5da8b38566d718631d016891e9c912 for pr-142704
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbasaandewiel%2Fditto_rust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/basaandewiel/ditto_rust on toolchain 1f5783cbeb5da8b38566d718631d016891e9c912
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f5783cbeb5da8b38566d718631d016891e9c912" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/basaandewiel/ditto_rust
[INFO] finished tweaking git repo https://github.com/basaandewiel/ditto_rust
[INFO] tweaked toml for git repo https://github.com/basaandewiel/ditto_rust written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/basaandewiel/ditto_rust 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" "+1f5783cbeb5da8b38566d718631d016891e9c912" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.145
[INFO] [stderr]   Downloaded safer_ffi-proc_macro v0.0.5
[INFO] [stderr]   Downloaded proc-macro2 v1.0.46
[INFO] [stderr]   Downloaded iana-time-zone v0.1.50
[INFO] [stderr]   Downloaded serde-transcode v1.1.1
[INFO] [stderr]   Downloaded uninit v0.3.0
[INFO] [stderr]   Downloaded dittolive-ditto-sys v3.0.4
[INFO] [stderr]   Downloaded serde v1.0.145
[INFO] [stderr]   Downloaded syn v1.0.101
[INFO] [stderr]   Downloaded ext-trait-proc_macros v1.0.1
[INFO] [stderr]   Downloaded ext-trait v1.0.1
[INFO] [stderr]   Downloaded cratesio-placeholder-package v0.0.0
[INFO] [stderr]   Downloaded macro_rules_attribute-proc_macro v0.0.2
[INFO] [stderr]   Downloaded macro_rules_attribute v0.0.2
[INFO] [stderr]   Downloaded mini_paste-proc_macro v0.1.11
[INFO] [stderr]   Downloaded mini_paste v0.1.11
[INFO] [stderr]   Downloaded dittolive-ditto v3.0.4
[INFO] [stderr]   Downloaded libc v0.2.134
[INFO] [stderr]   Downloaded safer-ffi v0.0.5
[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" "+1f5783cbeb5da8b38566d718631d016891e9c912" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d641570cc8bb9cde2d3a6ae3134b61a821a7f67f37f563d9d1a906e759032ae4
[INFO] running `Command { std: "docker" "start" "-a" "d641570cc8bb9cde2d3a6ae3134b61a821a7f67f37f563d9d1a906e759032ae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d641570cc8bb9cde2d3a6ae3134b61a821a7f67f37f563d9d1a906e759032ae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d641570cc8bb9cde2d3a6ae3134b61a821a7f67f37f563d9d1a906e759032ae4", kill_on_drop: false }`
[INFO] [stdout] d641570cc8bb9cde2d3a6ae3134b61a821a7f67f37f563d9d1a906e759032ae4
[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" "+1f5783cbeb5da8b38566d718631d016891e9c912" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c014d6b524949bc76e78a21373e8ea6b7bdc6f5da4b1be4b36b9328a21f3dd95
[INFO] running `Command { std: "docker" "start" "-a" "c014d6b524949bc76e78a21373e8ea6b7bdc6f5da4b1be4b36b9328a21f3dd95", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling syn v1.0.101
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling mini_paste-proc_macro v0.1.11
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]    Compiling macro_rules_attribute-proc_macro v0.0.2
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]     Checking uninit v0.3.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling serde_json v1.0.85
[INFO] [stderr]    Compiling safer_ffi-proc_macro v0.0.5
[INFO] [stderr]    Compiling dittolive-ditto-sys v3.0.4
[INFO] [stderr]     Checking macro_rules_attribute v0.0.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling paste v1.0.9
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.46/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 mini_paste v0.1.11
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking cratesio-placeholder-package v0.0.0
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking iana-time-zone v0.1.50
[INFO] [stderr]     Checking to_method v1.1.0
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]     Checking fs_extra v1.3.0
[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" "c014d6b524949bc76e78a21373e8ea6b7bdc6f5da4b1be4b36b9328a21f3dd95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c014d6b524949bc76e78a21373e8ea6b7bdc6f5da4b1be4b36b9328a21f3dd95", kill_on_drop: false }`
[INFO] [stdout] c014d6b524949bc76e78a21373e8ea6b7bdc6f5da4b1be4b36b9328a21f3dd95