[INFO] cloning repository https://github.com/girazoki/wasmtime-try
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/girazoki/wasmtime-try" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgirazoki%2Fwasmtime-try", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgirazoki%2Fwasmtime-try'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6d0a30bc6e353facb492c978706872416d52399
[INFO] checking girazoki/wasmtime-try against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgirazoki%2Fwasmtime-try" "/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/girazoki/wasmtime-try 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] removed /workspace/builds/worker-7-tc1/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/girazoki/wasmtime-try
[INFO] finished tweaking git repo https://github.com/girazoki/wasmtime-try
[INFO] tweaked toml for git repo https://github.com/girazoki/wasmtime-try written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/girazoki/wasmtime-try 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]      Locking 18 packages
[INFO] [stderr]  Downgrading cranelift-bforest v0.78.0 -> v0.77.0 (latest: v0.106.1)
[INFO] [stderr]  Downgrading cranelift-codegen v0.78.0 -> v0.77.0 (latest: v0.106.1)
[INFO] [stderr]  Downgrading cranelift-codegen-meta v0.78.0 -> v0.77.0 (latest: v0.106.1)
[INFO] [stderr]  Downgrading cranelift-codegen-shared v0.78.0 -> v0.77.0 (latest: v0.106.1)
[INFO] [stderr]  Downgrading cranelift-entity v0.78.0 -> v0.77.0 (latest: v0.106.1)
[INFO] [stderr]  Downgrading cranelift-frontend v0.78.0 -> v0.77.0 (latest: v0.106.1)
[INFO] [stderr]  Downgrading cranelift-native v0.78.0 -> v0.77.0 (latest: v0.106.1)
[INFO] [stderr]  Downgrading cranelift-wasm v0.78.0 -> v0.77.0 (latest: v0.106.1)
[INFO] [stderr]       Adding object v0.26.2 (latest: v0.34.0)
[INFO] [stderr]  Downgrading regalloc v0.0.32 -> v0.0.31 (latest: v0.0.34)
[INFO] [stderr]  Downgrading wasmparser v0.81.0 -> v0.80.2 (latest: v0.202.0)
[INFO] [stderr]  Downgrading wasmtime v0.31.0 -> v0.30.0 (latest: v19.0.1)
[INFO] [stderr]  Downgrading wasmtime-cache v0.31.0 -> v0.30.0 (latest: v19.0.1)
[INFO] [stderr]  Downgrading wasmtime-cranelift v0.31.0 -> v0.30.0 (latest: v19.0.1)
[INFO] [stderr]  Downgrading wasmtime-environ v0.31.0 -> v0.30.0 (latest: v19.0.1)
[INFO] [stderr]  Downgrading wasmtime-jit v0.31.0 -> v0.30.0 (latest: v17.0.2)
[INFO] [stderr]  Downgrading wasmtime-runtime v0.31.0 -> v0.30.0 (latest: v19.0.1)
[INFO] [stderr]  Downgrading wasmtime-types v0.31.0 -> v0.30.0 (latest: v19.0.1)
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasmtime-types v0.30.0
[INFO] [stderr]   Downloaded cranelift-native v0.77.0
[INFO] [stderr]   Downloaded zstd v0.9.0+zstd.1.5.0
[INFO] [stderr]   Downloaded cranelift-codegen-shared v0.77.0
[INFO] [stderr]   Downloaded cpp_demangle v0.3.3
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[INFO] [stderr]   Downloaded zstd-sys v1.6.1+zstd.1.5.0
[INFO] [stderr]   Downloaded cranelift-codegen v0.77.0
[INFO] [stderr]   Downloaded zstd-safe v4.1.1+zstd.1.5.0
[INFO] [stderr]   Downloaded wasmtime-cache v0.30.0
[INFO] [stderr]   Downloaded cranelift-bforest v0.77.0
[INFO] [stderr]   Downloaded cranelift-codegen-meta v0.77.0
[INFO] [stderr]   Downloaded cranelift-frontend v0.77.0
[INFO] [stderr]   Downloaded cranelift-wasm v0.77.0
[INFO] [stderr]   Downloaded wasmtime-cranelift v0.30.0
[INFO] [stderr]   Downloaded cranelift-entity v0.77.0
[INFO] [stderr]   Downloaded wasmtime-environ v0.30.0
[INFO] [stderr]   Downloaded wasmtime-runtime v0.30.0
[INFO] [stderr]   Downloaded wasmtime v0.30.0
[INFO] [stderr]   Downloaded wasmtime-jit v0.30.0
[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] 4f4a7188b102a8c7b9bb0952d772809a5ef3868a9d9a8945ce391728b64bc481
[INFO] running `Command { std: "docker" "start" "-a" "4f4a7188b102a8c7b9bb0952d772809a5ef3868a9d9a8945ce391728b64bc481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f4a7188b102a8c7b9bb0952d772809a5ef3868a9d9a8945ce391728b64bc481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f4a7188b102a8c7b9bb0952d772809a5ef3868a9d9a8945ce391728b64bc481", kill_on_drop: false }`
[INFO] [stdout] 4f4a7188b102a8c7b9bb0952d772809a5ef3868a9d9a8945ce391728b64bc481
[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] 04ce75e9bd32d237b2c311be8cf5d59e1c44bc9c9ebc2e38fd71a8603c5b892b
[INFO] running `Command { std: "docker" "start" "-a" "04ce75e9bd32d237b2c311be8cf5d59e1c44bc9c9ebc2e38fd71a8603c5b892b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling target-lexicon v0.12.2
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.77.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling anyhow v1.0.45
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking wasmparser v0.80.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling zstd-safe v4.1.1+zstd.1.5.0
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.15
[INFO] [stderr]     Checking more-asserts v0.2.1
[INFO] [stderr]     Checking regalloc v0.0.31
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking gimli v0.26.1
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[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking object v0.27.1
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking region v2.2.0
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
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[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling wasmtime-cache v0.30.0
[INFO] [stderr]    Compiling cpp_demangle v0.3.3
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking directories-next v2.0.0
[INFO] [stderr]     Checking errno v0.2.8
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]    Compiling wasmtime v0.30.0
[INFO] [stderr]    Compiling paste v1.0.6
[INFO] [stderr]     Checking sha2 v0.9.8
[INFO] [stderr]    Compiling zstd-sys v1.6.1+zstd.1.5.0
[INFO] [stderr]    Compiling backtrace v0.3.63
[INFO] [stderr]    Compiling wasmtime-runtime v0.30.0
[INFO] [stderr]    Compiling psm v0.1.16
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking file-per-thread-logger v0.1.4
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]    Compiling cranelift-entity v0.77.0
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.77.0
[INFO] [stderr]     Checking wasmtime-types v0.30.0
[INFO] [stderr]     Checking cranelift-bforest v0.77.0
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]     Checking object v0.26.2
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]     Checking wasmtime-environ v0.30.0
[INFO] [stderr]    Compiling cranelift-codegen v0.77.0
[INFO] [stderr]     Checking wasmtime-jit v0.30.0
[INFO] [stderr]     Checking zstd v0.9.0+zstd.1.5.0
[INFO] [stderr]     Checking cranelift-frontend v0.77.0
[INFO] [stderr]     Checking cranelift-native v0.77.0
[INFO] [stderr]     Checking cranelift-wasm v0.77.0
[INFO] [stderr]     Checking wasmtime-cranelift v0.30.0
[INFO] [stderr]     Checking wasmtime-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `module`
[INFO] [stdout]  --> src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let module = Module::from_file(&engine, &file_name)?;
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_module`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `module`
[INFO] [stdout]  --> src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let module = Module::from_file(&engine, &file_name)?;
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_module`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     load("./moonbase_runtime_slow.wasm");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let _ = load("./moonbase_runtime_slow.wasm");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     load("./moonbase_runtime_slow.wasm");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let _ = load("./moonbase_runtime_slow.wasm");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     load("./moonbase_fast_runtime.wasm");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let _ = load("./moonbase_fast_runtime.wasm");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     load("./moonbase_fast_runtime.wasm");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let _ = load("./moonbase_fast_runtime.wasm");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 05s
[INFO] running `Command { std: "docker" "inspect" "04ce75e9bd32d237b2c311be8cf5d59e1c44bc9c9ebc2e38fd71a8603c5b892b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04ce75e9bd32d237b2c311be8cf5d59e1c44bc9c9ebc2e38fd71a8603c5b892b", kill_on_drop: false }`
[INFO] [stdout] 04ce75e9bd32d237b2c311be8cf5d59e1c44bc9c9ebc2e38fd71a8603c5b892b