[INFO] fetching crate melstf 0.12.3...
[INFO] testing melstf-0.12.3 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate melstf 0.12.3 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate melstf 0.12.3
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate melstf 0.12.3
[INFO] tweaked toml for crates.io crate melstf 0.12.3 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate melstf 0.12.3 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate melstf 0.12.3 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ed25519-consensus v1.2.1
[INFO] [stderr]   Downloaded stdcode v0.1.14
[INFO] [stderr]   Downloaded derive_arbitrary v1.2.0
[INFO] [stderr]   Downloaded arbitrary v1.2.0
[INFO] [stderr]   Downloaded genawaiter-proc-macro v0.99.1
[INFO] [stderr]   Downloaded argh_shared v0.1.9
[INFO] [stderr]   Downloaded assoc v0.1.2
[INFO] [stderr]   Downloaded defmac v0.2.1
[INFO] [stderr]   Downloaded structmeta-derive v0.1.5
[INFO] [stderr]   Downloaded melvm v0.1.0
[INFO] [stderr]   Downloaded argh_derive v0.1.9
[INFO] [stderr]   Downloaded structmeta v0.1.5
[INFO] [stderr]   Downloaded argh v0.1.9
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.81
[INFO] [stderr]   Downloaded cxx-build v1.0.81
[INFO] [stderr]   Downloaded imbl v2.0.0
[INFO] [stderr]   Downloaded syn v1.0.105
[INFO] [stderr]   Downloaded cxx v1.0.81
[INFO] [stderr]   Downloaded raw-cpuid v10.6.0
[INFO] [stderr]   Downloaded chrono v0.4.22
[INFO] [stderr]   Downloaded bitvec v0.20.4
[INFO] [stderr]   Downloaded unsafe-libyaml v0.2.4
[INFO] [stderr]   Downloaded imbl-sized-chunks v0.1.1
[INFO] [stderr]   Downloaded ethnum v1.3.2
[INFO] [stderr]   Downloaded melpow v0.1.1
[INFO] [stderr]   Downloaded catvec v0.1.6
[INFO] [stderr]   Downloaded meshanina v0.4.2
[INFO] [stderr]   Downloaded serde_repr v0.1.9
[INFO] [stderr]   Downloaded syn-mid v0.5.3
[INFO] [stderr]   Downloaded genawaiter v0.99.1
[INFO] [stderr]   Downloaded novasmt v0.2.19
[INFO] [stderr]   Downloaded serde v1.0.149
[INFO] [stderr]   Downloaded melstructs v0.3.1
[INFO] [stderr]   Downloaded serde_derive v1.0.149
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.81
[INFO] [stderr]   Downloaded genawaiter-macro v0.99.1
[INFO] [stderr]   Downloaded honggfuzz v0.5.55
[INFO] [stderr]   Downloaded tip911-stakeset v0.0.2
[INFO] [stderr]   Downloaded tmelcrypt v0.2.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3067571e146f4f54d986dc8bf5604ee1d78fc7adfdb18573bc70e42e38ab411
[INFO] running `Command { std: "docker" "start" "-a" "a3067571e146f4f54d986dc8bf5604ee1d78fc7adfdb18573bc70e42e38ab411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3067571e146f4f54d986dc8bf5604ee1d78fc7adfdb18573bc70e42e38ab411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3067571e146f4f54d986dc8bf5604ee1d78fc7adfdb18573bc70e42e38ab411", kill_on_drop: false }`
[INFO] [stdout] a3067571e146f4f54d986dc8bf5604ee1d78fc7adfdb18573bc70e42e38ab411
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5f5722229e526951d0d2ee5cba532acc7d0374b3302d86384c47355a074604c
[INFO] running `Command { std: "docker" "start" "-a" "f5f5722229e526951d0d2ee5cba532acc7d0374b3302d86384c47355a074604c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling serde_derive v1.0.149
[INFO] [stderr]    Compiling serde v1.0.149
[INFO] [stderr]    Compiling once_cell v1.16.0
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling cc v1.0.76
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.11
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling arrayvec v0.7.2
[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 log v0.4.17
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling subtle-ng v2.5.0
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling cpufeatures v0.2.5
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling zeroize v1.5.7
[INFO] [stderr]    Compiling aho-corasick v0.7.19
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[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" "f5f5722229e526951d0d2ee5cba532acc7d0374b3302d86384c47355a074604c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5f5722229e526951d0d2ee5cba532acc7d0374b3302d86384c47355a074604c", kill_on_drop: false }`
[INFO] [stdout] f5f5722229e526951d0d2ee5cba532acc7d0374b3302d86384c47355a074604c