[INFO] fetching crate v8vm 0.0.1...
[INFO] testing v8vm-0.0.1 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145330-1
[INFO] extracting crate v8vm 0.0.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate v8vm 0.0.1
[INFO] finished tweaking crates.io crate v8vm 0.0.1
[INFO] tweaked toml for crates.io crate v8vm 0.0.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate v8vm 0.0.1 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate v8vm 0.0.1 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded which v4.3.0
[INFO] [stderr]   Downloaded fslock v0.1.8
[INFO] [stderr]   Downloaded once_cell v1.15.0
[INFO] [stderr]   Downloaded futures-sink v0.3.24
[INFO] [stderr]   Downloaded futures-core v0.3.24
[INFO] [stderr]   Downloaded futures-task v0.3.24
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.33
[INFO] [stderr]   Downloaded futures-channel v0.3.24
[INFO] [stderr]   Downloaded hyper-rustls v0.23.0
[INFO] [stderr]   Downloaded anyhow v1.0.65
[INFO] [stderr]   Downloaded bumpalo v3.11.0
[INFO] [stderr]   Downloaded serde_v8 v0.60.0
[INFO] [stderr]   Downloaded bytes v1.2.1
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.12
[INFO] [stderr]   Downloaded futures-util v0.3.24
[INFO] [stderr]   Downloaded h2 v0.3.14
[INFO] [stderr]   Downloaded reqwest v0.11.12
[INFO] [stderr]   Downloaded syn v1.0.101
[INFO] [stderr]   Downloaded hyper v0.14.20
[INFO] [stderr]   Downloaded webpki-roots v0.22.5
[INFO] [stderr]   Downloaded unsafe-libyaml v0.2.4
[INFO] [stderr]   Downloaded serde_yaml v0.9.13
[INFO] [stderr]   Downloaded ipnet v2.5.0
[INFO] [stderr]   Downloaded semver v1.0.14
[INFO] [stderr]   Downloaded rustls-pemfile v1.0.1
[INFO] [stderr]   Downloaded serde_bytes v0.11.7
[INFO] [stderr]   Downloaded tokio-macros v1.8.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.46
[INFO] [stderr]   Downloaded libc v0.2.134
[INFO] [stderr]   Downloaded either v1.8.0
[INFO] [stderr]   Downloaded tokio v1.21.2
[INFO] [stderr]   Downloaded web-sys v0.3.60
[INFO] [stderr]   Downloaded v8 v0.49.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4952dcffb367b249f99338f1ac39fb4a18756bc2d7946cca3acf4b0df897bbd3
[INFO] running `Command { std: "docker" "start" "-a" "4952dcffb367b249f99338f1ac39fb4a18756bc2d7946cca3acf4b0df897bbd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4952dcffb367b249f99338f1ac39fb4a18756bc2d7946cca3acf4b0df897bbd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4952dcffb367b249f99338f1ac39fb4a18756bc2d7946cca3acf4b0df897bbd3", kill_on_drop: false }`
[INFO] [stdout] 4952dcffb367b249f99338f1ac39fb4a18756bc2d7946cca3acf4b0df897bbd3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ccc9b8aa4fad4bb7b4ac9af5f5791b1335527bd21cbbac9fcb3e28150d6736e2
[INFO] running `Command { std: "docker" "start" "-a" "ccc9b8aa4fad4bb7b4ac9af5f5791b1335527bd21cbbac9fcb3e28150d6736e2", kill_on_drop: false }`
[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 libc v0.2.134
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling once_cell v1.15.0
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling bytes v1.2.1
[INFO] [stderr]    Compiling serde_json v1.0.85
[INFO] [stderr]    Compiling itoa v1.0.3
[INFO] [stderr]    Compiling anyhow v1.0.65
[INFO] [stderr]    Compiling ryu v1.0.11
[INFO] [stderr]    Compiling tracing-core v0.1.29
[INFO] [stderr]    Compiling smallvec v1.9.0
[INFO] [stderr]    Compiling http v0.2.8
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.46/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] [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" "ccc9b8aa4fad4bb7b4ac9af5f5791b1335527bd21cbbac9fcb3e28150d6736e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccc9b8aa4fad4bb7b4ac9af5f5791b1335527bd21cbbac9fcb3e28150d6736e2", kill_on_drop: false }`
[INFO] [stdout] ccc9b8aa4fad4bb7b4ac9af5f5791b1335527bd21cbbac9fcb3e28150d6736e2