[INFO] fetching crate simple-web-server 0.2.0...
[INFO] testing simple-web-server-0.2.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate simple-web-server 0.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate simple-web-server 0.2.0
[INFO] finished tweaking crates.io crate simple-web-server 0.2.0
[INFO] tweaked toml for crates.io crate simple-web-server 0.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate simple-web-server 0.2.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate simple-web-server 0.2.0 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smallvec v1.8.0
[INFO] [stderr]   Downloaded rust-utils v0.6.1
[INFO] [stderr]   Downloaded time-macros v0.2.4
[INFO] [stderr]   Downloaded ctrlc v3.2.4
[INFO] [stderr]   Downloaded local-channel v0.1.3
[INFO] [stderr]   Downloaded actix-codec v0.5.0
[INFO] [stderr]   Downloaded askama_escape v0.10.3
[INFO] [stderr]   Downloaded actix-files v0.6.2
[INFO] [stderr]   Downloaded actix-router v0.5.0
[INFO] [stderr]   Downloaded language-tags v0.3.2
[INFO] [stderr]   Downloaded lock_api v0.4.7
[INFO] [stderr]   Downloaded actix-utils v3.0.0
[INFO] [stderr]   Downloaded getrandom v0.2.6
[INFO] [stderr]   Downloaded zstd-sys v2.0.5+zstd.1.5.2
[INFO] [stderr]   Downloaded flate2 v1.0.23
[INFO] [stderr]   Downloaded mio v0.8.3
[INFO] [stderr]   Downloaded actix-http v3.2.2
[INFO] [stderr]   Downloaded http-range v0.1.5
[INFO] [stderr]   Downloaded alloc-stdlib v0.2.1
[INFO] [stderr]   Downloaded miniz_oxide v0.5.1
[INFO] [stderr]   Downloaded httparse v1.7.1
[INFO] [stderr]   Downloaded block-buffer v0.10.2
[INFO] [stderr]   Downloaded crypto-common v0.1.3
[INFO] [stderr]   Downloaded sha1 v0.10.5
[INFO] [stderr]   Downloaded tokio v1.18.2
[INFO] [stderr]   Downloaded actix-macros v0.2.3
[INFO] [stderr]   Downloaded local-waker v0.1.3
[INFO] [stderr]   Downloaded firestorm v0.5.0
[INFO] [stderr]   Downloaded bytestring v1.0.0
[INFO] [stderr]   Downloaded brotli-decompressor v2.3.2
[INFO] [stderr]   Downloaded cookie v0.16.0
[INFO] [stderr]   Downloaded semver v1.0.9
[INFO] [stderr]   Downloaded alloc-no-stdlib v2.0.3
[INFO] [stderr]   Downloaded cpufeatures v0.2.2
[INFO] [stderr]   Downloaded generic-array v0.14.5
[INFO] [stderr]   Downloaded actix-rt v2.7.0
[INFO] [stderr]   Downloaded parking_lot_core v0.9.3
[INFO] [stderr]   Downloaded parking_lot v0.12.0
[INFO] [stderr]   Downloaded tracing-attributes v0.1.21
[INFO] [stderr]   Downloaded actix-server v2.1.1
[INFO] [stderr]   Downloaded paste v1.0.7
[INFO] [stderr]   Downloaded actix-service v2.0.2
[INFO] [stderr]   Downloaded actix-web-codegen v4.1.0
[INFO] [stderr]   Downloaded serde_json v1.0.81
[INFO] [stderr]   Downloaded actix-web v4.2.1
[INFO] [stderr]   Downloaded nix v0.26.1
[INFO] [stderr]   Downloaded time v0.3.9
[INFO] [stderr]   Downloaded jobserver v0.1.24
[INFO] [stderr]   Downloaded brotli v3.3.4
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59964b384fa14faa301cf8e1fad5e512d17cb406965d8304aa20d1b605513ea3
[INFO] running `Command { std: "docker" "start" "-a" "59964b384fa14faa301cf8e1fad5e512d17cb406965d8304aa20d1b605513ea3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59964b384fa14faa301cf8e1fad5e512d17cb406965d8304aa20d1b605513ea3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59964b384fa14faa301cf8e1fad5e512d17cb406965d8304aa20d1b605513ea3", kill_on_drop: false }`
[INFO] [stdout] 59964b384fa14faa301cf8e1fad5e512d17cb406965d8304aa20d1b605513ea3
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] d572c4caa1e07e7e28d2a6b252fd99dcff9f54e7c213d3b96dd3e7e18be5fcf8
[INFO] running `Command { std: "docker" "start" "-a" "d572c4caa1e07e7e28d2a6b252fd99dcff9f54e7c213d3b96dd3e7e18be5fcf8", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling socket2 v0.4.4
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.50/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]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling tracing-core v0.1.26
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling mio v0.8.3
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling futures-sink v0.3.21
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling zstd-safe v5.0.2+zstd.1.5.2
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling local-waker v0.1.3
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling alloc-no-stdlib v2.0.3
[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" "d572c4caa1e07e7e28d2a6b252fd99dcff9f54e7c213d3b96dd3e7e18be5fcf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d572c4caa1e07e7e28d2a6b252fd99dcff9f54e7c213d3b96dd3e7e18be5fcf8", kill_on_drop: false }`
[INFO] [stdout] d572c4caa1e07e7e28d2a6b252fd99dcff9f54e7c213d3b96dd3e7e18be5fcf8