[INFO] cloning repository https://github.com/google/mosaic
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/google/mosaic" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgoogle%2Fmosaic", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgoogle%2Fmosaic'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 345566951a795e69809dca52619631821e2897ed
[INFO] checking google/mosaic against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgoogle%2Fmosaic" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/google/mosaic on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-4/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/google/mosaic
[INFO] finished tweaking git repo https://github.com/google/mosaic
[INFO] tweaked toml for git repo https://github.com/google/mosaic written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/google/mosaic already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79a105987dff5fab3fa253dc2b84c4b5d594d0716059cbbd46a08b79d0477003
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "79a105987dff5fab3fa253dc2b84c4b5d594d0716059cbbd46a08b79d0477003", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79a105987dff5fab3fa253dc2b84c4b5d594d0716059cbbd46a08b79d0477003", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79a105987dff5fab3fa253dc2b84c4b5d594d0716059cbbd46a08b79d0477003", kill_on_drop: false }`
[INFO] [stdout] 79a105987dff5fab3fa253dc2b84c4b5d594d0716059cbbd46a08b79d0477003
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 100fb357d1a1fa8f202eeb4155608ab35a9bdda9f1a41d1331fbc2ee403d6de2
[INFO] running `Command { std: "docker" "start" "-a" "100fb357d1a1fa8f202eeb4155608ab35a9bdda9f1a41d1331fbc2ee403d6de2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling unindent v0.1.6
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking cc v1.0.58
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.3
[INFO] [stderr]    Compiling hashbrown v0.8.1
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling indexmap v1.5.0
[INFO] [stderr]    Compiling clang-sys v1.2.0
[INFO] [stderr]     Checking libloading v0.7.0
[INFO] [stderr]     Checking codespan-reporting v0.9.5
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking codespan v0.9.5
[INFO] [stderr]     Checking quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking clang v1.0.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking cc_use_common v0.1.0 (/opt/rustwide/workdir/cc_use_common)
[INFO] [stderr]     Checking gen_macro_impl v0.1.0 (/opt/rustwide/workdir/gen_macro/impl)
[INFO] [stderr]     Checking cc_use v0.1.0 (/opt/rustwide/workdir/cc_use)
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling salsa-macros v0.14.1
[INFO] [stderr]    Compiling rental-impl v0.5.5
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking gen_macro v0.1.0 (/opt/rustwide/workdir/gen_macro)
[INFO] [stderr]     Checking salsa v0.14.4
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stderr]     Checking rental v0.5.6
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking trybuild v1.0.30 (https://github.com/tmandry/trybuild.git?branch=strategy#1a5990c4)
[INFO] [stderr]     Checking mosaic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `procedural-masquerade` crate
[INFO] [stdout]    --> src/libclang/mod.rs:310:1
[INFO] [stdout]     |
[INFO] [stdout] 310 | / rental! {
[INFO] [stdout] 311 | |     mod rent {
[INFO] [stdout] 312 | |         use super::*;
[INFO] [stdout] 313 | |
[INFO] [stdout] ...   |
[INFO] [stdout] 347 | |     }
[INFO] [stdout] 348 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(proc_macro_back_compat)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
[INFO] [stdout]     = note: The `procedural-masquerade` crate has been unnecessary since Rust 1.30.0. Versions of this crate below 0.1.7 will eventually stop compiling.
[INFO] [stdout]     = note: this warning originates in the macro `rental` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `procedural-masquerade` crate
[INFO] [stdout]    --> src/libclang/mod.rs:310:1
[INFO] [stdout]     |
[INFO] [stdout] 310 | / rental! {
[INFO] [stdout] 311 | |     mod rent {
[INFO] [stdout] 312 | |         use super::*;
[INFO] [stdout] 313 | |
[INFO] [stdout] ...   |
[INFO] [stdout] 347 | |     }
[INFO] [stdout] 348 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(proc_macro_back_compat)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
[INFO] [stdout]     = note: The `procedural-masquerade` crate has been unnecessary since Rust 1.30.0. Versions of this crate below 0.1.7 will eventually stop compiling.
[INFO] [stdout]     = note: this warning originates in the macro `rental` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 57s
[INFO] running `Command { std: "docker" "inspect" "100fb357d1a1fa8f202eeb4155608ab35a9bdda9f1a41d1331fbc2ee403d6de2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "100fb357d1a1fa8f202eeb4155608ab35a9bdda9f1a41d1331fbc2ee403d6de2", kill_on_drop: false }`
[INFO] [stdout] 100fb357d1a1fa8f202eeb4155608ab35a9bdda9f1a41d1331fbc2ee403d6de2