[INFO] cloning repository https://github.com/fexolm/jfec
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fexolm/jfec" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffexolm%2Fjfec", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffexolm%2Fjfec'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6de42e1766324b065d6ef53eb278677017d115bc
[INFO] checking fexolm/jfec against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffexolm%2Fjfec" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fexolm/jfec on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fexolm/jfec
[INFO] finished tweaking git repo https://github.com/fexolm/jfec
[INFO] tweaked toml for git repo https://github.com/fexolm/jfec written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fexolm/jfec 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded maplit v1.0.1
[INFO] [stderr]   Downloaded pest_generator v2.1.0
[INFO] [stderr]   Downloaded ucd-trie v0.1.1
[INFO] [stderr]   Downloaded cast v0.1.0
[INFO] [stderr]   Downloaded pest_meta v2.1.0
[INFO] [stderr]   Downloaded criterion-plot v0.1.3
[INFO] [stderr]   Downloaded isatty v0.1.9
[INFO] [stderr]   Downloaded itertools v0.5.10
[INFO] [stderr]   Downloaded criterion-stats v0.1.3
[INFO] [stderr]   Downloaded itertools v0.4.19
[INFO] [stderr]   Downloaded criterion v0.1.2
[INFO] [stderr]   Downloaded regex v1.1.5
[INFO] [stderr]   Downloaded llvm-sys v70.1.0
[INFO] [stderr]   Downloaded pest v2.1.0
[INFO] [stderr]   Downloaded simplelog v0.4.4
[INFO] [stderr]   Downloaded either v1.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fffd1f51602c4db8c659da49eff341bee042cbfdab0939f198e72e4d87f523b5
[INFO] running `Command { std: "docker" "start" "-a" "fffd1f51602c4db8c659da49eff341bee042cbfdab0939f198e72e4d87f523b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fffd1f51602c4db8c659da49eff341bee042cbfdab0939f198e72e4d87f523b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fffd1f51602c4db8c659da49eff341bee042cbfdab0939f198e72e4d87f523b5", kill_on_drop: false }`
[INFO] [stdout] fffd1f51602c4db8c659da49eff341bee042cbfdab0939f198e72e4d87f523b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b566dbf574348a75068472a631a66cee9b56e47cfc08148b2b19e13373abd1d
[INFO] running `Command { std: "docker" "start" "-a" "5b566dbf574348a75068472a631a66cee9b56e47cfc08148b2b19e13373abd1d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cc v1.0.31
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.5
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]     Checking either v1.5.1
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling pest v2.1.0
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking cast v0.1.0
[INFO] [stderr]     Checking rustc-demangle v0.1.13
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking term v0.4.6
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking criterion-plot v0.1.3
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]    Compiling pest_meta v2.1.0
[INFO] [stderr]     Checking simplelog v0.4.4
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking criterion-stats v0.1.3
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling llvm-sys v70.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking jfec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `AsRef` is imported redundantly
[INFO] [stdout]   --> src/codegen/ssa/instruction.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         use std::convert::AsRef;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `AsRef` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.1.2
[INFO] [stdout] warning: the item `AsRef` is imported redundantly
[INFO] [stdout]   --> src/codegen/ssa/instruction.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         use std::convert::AsRef;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `AsRef` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.08s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.1.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "5b566dbf574348a75068472a631a66cee9b56e47cfc08148b2b19e13373abd1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b566dbf574348a75068472a631a66cee9b56e47cfc08148b2b19e13373abd1d", kill_on_drop: false }`
[INFO] [stdout] 5b566dbf574348a75068472a631a66cee9b56e47cfc08148b2b19e13373abd1d