[INFO] fetching crate cursive-flexbox 0.3.0...
[INFO] checking cursive-flexbox-0.3.0 against master#b0696a5160711c068cb1f01b7437db7990d15750 for pr-121848
[INFO] extracting crate cursive-flexbox 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate cursive-flexbox 0.3.0 on toolchain b0696a5160711c068cb1f01b7437db7990d15750
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b0696a5160711c068cb1f01b7437db7990d15750" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cursive-flexbox 0.3.0
[INFO] finished tweaking crates.io crate cursive-flexbox 0.3.0
[INFO] tweaked toml for crates.io crate cursive-flexbox 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate cursive-flexbox 0.3.0 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" "+b0696a5160711c068cb1f01b7437db7990d15750" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded enum-map-derive v0.11.0
[INFO] [stderr]   Downloaded enum-map v2.5.0
[INFO] [stderr]   Downloaded enumset v1.0.12
[INFO] [stderr]   Downloaded enumset_derive v0.6.1
[INFO] [stderr]   Downloaded console v0.15.5
[INFO] [stderr]   Downloaded cursive v0.20.0
[INFO] [stderr]   Downloaded cursive_core v0.3.7
[INFO] [stderr]   Downloaded insta v1.29.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+b0696a5160711c068cb1f01b7437db7990d15750" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 073ecf8031cc0b85a2ac44fb62d4fc46e62b54cded18988cc4227ecf5338a561
[INFO] running `Command { std: "docker" "start" "-a" "073ecf8031cc0b85a2ac44fb62d4fc46e62b54cded18988cc4227ecf5338a561", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "073ecf8031cc0b85a2ac44fb62d4fc46e62b54cded18988cc4227ecf5338a561", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "073ecf8031cc0b85a2ac44fb62d4fc46e62b54cded18988cc4227ecf5338a561", kill_on_drop: false }`
[INFO] [stdout] 073ecf8031cc0b85a2ac44fb62d4fc46e62b54cded18988cc4227ecf5338a561
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+b0696a5160711c068cb1f01b7437db7990d15750" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c0b1dc6e25435455bf45b01e31f10cf7d8dd9b9aa3a7336378d034f7d4efce0
[INFO] running `Command { std: "docker" "start" "-a" "2c0b1dc6e25435455bf45b01e31f10cf7d8dd9b9aa3a7336378d034f7d4efce0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling ahash v0.8.3
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]     Checking once_cell v1.17.1
[INFO] [stderr]     Checking time-core v0.1.0
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.56/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]     Checking crossbeam-channel v0.5.7
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking log v0.4.17
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling signal-hook v0.3.15
[INFO] [stdout] error: aborting due to 1 previous error
[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 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2c0b1dc6e25435455bf45b01e31f10cf7d8dd9b9aa3a7336378d034f7d4efce0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c0b1dc6e25435455bf45b01e31f10cf7d8dd9b9aa3a7336378d034f7d4efce0", kill_on_drop: false }`
[INFO] [stdout] 2c0b1dc6e25435455bf45b01e31f10cf7d8dd9b9aa3a7336378d034f7d4efce0
[INFO] checking cursive-flexbox-0.3.0 against try#bfe97fcae016881ad333f0ff8cea2cadb9cf136c for pr-121848
[INFO] extracting crate cursive-flexbox 0.3.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate cursive-flexbox 0.3.0 on toolchain bfe97fcae016881ad333f0ff8cea2cadb9cf136c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cursive-flexbox 0.3.0
[INFO] finished tweaking crates.io crate cursive-flexbox 0.3.0
[INFO] tweaked toml for crates.io crate cursive-flexbox 0.3.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate cursive-flexbox 0.3.0 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" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c726601a3f0848927e41b1f6679f3b5a7e491f203427da4b7c87f62a5d904b2
[INFO] running `Command { std: "docker" "start" "-a" "4c726601a3f0848927e41b1f6679f3b5a7e491f203427da4b7c87f62a5d904b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c726601a3f0848927e41b1f6679f3b5a7e491f203427da4b7c87f62a5d904b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c726601a3f0848927e41b1f6679f3b5a7e491f203427da4b7c87f62a5d904b2", kill_on_drop: false }`
[INFO] [stdout] 4c726601a3f0848927e41b1f6679f3b5a7e491f203427da4b7c87f62a5d904b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5c5a56a6735a082e075673862e9e64b2860334d933e0af1984ea2a48545c811
[INFO] running `Command { std: "docker" "start" "-a" "e5c5a56a6735a082e075673862e9e64b2860334d933e0af1984ea2a48545c811", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling ahash v0.8.3
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]     Checking once_cell v1.17.1
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking time-core v0.1.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.56/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 cc v1.0.79
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking log v0.4.17
[INFO] [stderr]     Checking crossbeam-channel v0.5.7
[INFO] [stderr]    Compiling crossbeam-queue v0.3.8
[INFO] [stderr]    Compiling signal-hook v0.3.15
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stdout] error: aborting due to 1 previous error
[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 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e5c5a56a6735a082e075673862e9e64b2860334d933e0af1984ea2a48545c811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5c5a56a6735a082e075673862e9e64b2860334d933e0af1984ea2a48545c811", kill_on_drop: false }`
[INFO] [stdout] e5c5a56a6735a082e075673862e9e64b2860334d933e0af1984ea2a48545c811
