[INFO] fetching crate semverver 0.1.52...
[INFO] testing semverver-0.1.52 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_getrandom_patch_0
[INFO] extracting crate semverver 0.1.52 into /workspace/builds/worker-3-tc1/source
[INFO] removed /workspace/builds/worker-3-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate semverver 0.1.52
[INFO] finished tweaking crates.io crate semverver 0.1.52
[INFO] tweaked toml for crates.io crate semverver 0.1.52 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate semverver 0.1.52 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 semverver 0.1.52 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 openssl-sys v0.9.74
[INFO] [stderr]   Downloaded commoncrypto-sys v0.2.0
[INFO] [stderr]   Downloaded commoncrypto v0.2.0
[INFO] [stderr]   Downloaded kstring v2.0.0
[INFO] [stderr]   Downloaded home v0.5.3
[INFO] [stderr]   Downloaded crates-io v0.34.0
[INFO] [stderr]   Downloaded bytesize v1.1.0
[INFO] [stderr]   Downloaded os_info v3.5.1
[INFO] [stderr]   Downloaded cargo-util v0.2.1
[INFO] [stderr]   Downloaded fwdansi v1.1.0
[INFO] [stderr]   Downloaded git2-curl v0.16.0
[INFO] [stderr]   Downloaded toml_edit v0.15.0
[INFO] [stderr]   Downloaded curl v0.4.44
[INFO] [stderr]   Downloaded serde_ignored v0.1.3
[INFO] [stderr]   Downloaded git2 v0.15.0
[INFO] [stderr]   Downloaded rustfix v0.6.1
[INFO] [stderr]   Downloaded crypto-hash v0.3.4
[INFO] [stderr]   Downloaded rustc-workspace-hack v1.0.0
[INFO] [stderr]   Downloaded toml_datetime v0.5.0
[INFO] [stderr]   Downloaded libssh2-sys v0.2.23
[INFO] [stderr]   Downloaded libgit2-sys v0.14.2+1.5.1
[INFO] [stderr]   Downloaded cargo v0.67.0
[INFO] [stderr]   Downloaded curl-sys v0.4.56+curl-7.83.1
[INFO] [stderr]   Downloaded libnghttp2-sys v0.1.7+1.45.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 13c9d6f77bdb5226930edf848e60e1324b72ead535ca538e963855f4a171a8af
[INFO] running `Command { std: "docker" "start" "-a" "13c9d6f77bdb5226930edf848e60e1324b72ead535ca538e963855f4a171a8af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13c9d6f77bdb5226930edf848e60e1324b72ead535ca538e963855f4a171a8af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13c9d6f77bdb5226930edf848e60e1324b72ead535ca538e963855f4a171a8af", kill_on_drop: false }`
[INFO] [stdout] 13c9d6f77bdb5226930edf848e60e1324b72ead535ca538e963855f4a171a8af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] e6e2523daf8571ebdcba7eef3067bd415c4da27f5accd358c105264041145310
[INFO] running `Command { std: "docker" "start" "-a" "e6e2523daf8571ebdcba7eef3067bd415c4da27f5accd358c105264041145310", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.104
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[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]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.2
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[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" "e6e2523daf8571ebdcba7eef3067bd415c4da27f5accd358c105264041145310", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6e2523daf8571ebdcba7eef3067bd415c4da27f5accd358c105264041145310", kill_on_drop: false }`
[INFO] [stdout] e6e2523daf8571ebdcba7eef3067bd415c4da27f5accd358c105264041145310