[INFO] fetching crate qwiki 0.3.1...
[INFO] checking qwiki-0.3.1 against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] extracting crate qwiki 0.3.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate qwiki 0.3.1
[INFO] finished tweaking crates.io crate qwiki 0.3.1
[INFO] tweaked toml for crates.io crate qwiki 0.3.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate qwiki 0.3.1 on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate qwiki 0.3.1 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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 828dc2bff071c685a88d7ed2a4f43397573fb252b423a4c5fa4a75eab52da92c
[INFO] running `Command { std: "docker" "start" "-a" "828dc2bff071c685a88d7ed2a4f43397573fb252b423a4c5fa4a75eab52da92c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "828dc2bff071c685a88d7ed2a4f43397573fb252b423a4c5fa4a75eab52da92c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "828dc2bff071c685a88d7ed2a4f43397573fb252b423a4c5fa4a75eab52da92c", kill_on_drop: false }`
[INFO] [stdout] 828dc2bff071c685a88d7ed2a4f43397573fb252b423a4c5fa4a75eab52da92c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c291e939029864d60b0b2584aed6425b7dd9a568ddcb731f0286505321e95215
[INFO] running `Command { std: "docker" "start" "-a" "c291e939029864d60b0b2584aed6425b7dd9a568ddcb731f0286505321e95215", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling openssl v0.10.45
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking gimli v0.27.0
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking form_urlencoded v1.1.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking idna v0.3.0
[INFO] [stderr]    Compiling hyper v0.12.36
[INFO] [stderr]    Compiling serde_json v1.0.91
[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] help: there is a feature with a similar name: `proc_macro_span_file`
[INFO] [stdout]    |
[INFO] [stdout] 92 -     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout] 92 +     feature(proc_macro_span, proc_macro_span_file)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling openssl-sys v0.9.80
[INFO] [stderr]    Compiling backtrace v0.3.67
[INFO] [stderr]     Checking rand_hc v0.1.0
[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" "c291e939029864d60b0b2584aed6425b7dd9a568ddcb731f0286505321e95215", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c291e939029864d60b0b2584aed6425b7dd9a568ddcb731f0286505321e95215", kill_on_drop: false }`
[INFO] [stdout] c291e939029864d60b0b2584aed6425b7dd9a568ddcb731f0286505321e95215
