[INFO] fetching crate enalang_optimizer 0.6.1...
[INFO] checking enalang_optimizer-0.6.1 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] extracting crate enalang_optimizer 0.6.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate enalang_optimizer 0.6.1 on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate enalang_optimizer 0.6.1
[INFO] finished tweaking crates.io crate enalang_optimizer 0.6.1
[INFO] tweaked toml for crates.io crate enalang_optimizer 0.6.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 29 packages to latest compatible versions
[INFO] [stderr]       Adding ordered-float v3.9.2 (latest: v4.2.2)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.2+wasi-0.2.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded enalang_ir v0.6.1
[INFO] [stderr]   Downloaded flexstr v0.9.2
[INFO] [stderr]   Downloaded enalang_vm v0.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 002c60a7d266fbaf17a2d26574cbaa0216025acceb47d4cb2575982dce02a8b2
[INFO] running `Command { std: "docker" "start" "-a" "002c60a7d266fbaf17a2d26574cbaa0216025acceb47d4cb2575982dce02a8b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "002c60a7d266fbaf17a2d26574cbaa0216025acceb47d4cb2575982dce02a8b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "002c60a7d266fbaf17a2d26574cbaa0216025acceb47d4cb2575982dce02a8b2", kill_on_drop: false }`
[INFO] [stdout] 002c60a7d266fbaf17a2d26574cbaa0216025acceb47d4cb2575982dce02a8b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd4b52c1479c23b041ca120f103affe58557779c1087d56c1f9cf8d792d8ff8b
[INFO] running `Command { std: "docker" "start" "-a" "fd4b52c1479c23b041ca120f103affe58557779c1087d56c1f9cf8d792d8ff8b", kill_on_drop: false }`
[INFO] [stderr]     Checking radix_fmt v1.0.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.63
[INFO] [stderr]     Checking ordered-float v3.9.2
[INFO] [stderr]     Checking flexstr v0.9.2
[INFO] [stderr]     Checking thiserror v1.0.63
[INFO] [stderr]     Checking enalang_ir v0.6.1
[INFO] [stderr]     Checking enalang_vm v0.6.1
[INFO] [stderr]     Checking enalang_optimizer v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `ctx` is never read
[INFO] [stdout]   --> src/optimizations/unused_blocks.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct UnusedBlocksOptimization {
[INFO] [stdout]    |            ------------------------ field in this struct
[INFO] [stdout] 13 |     ctx: OptimizationContext,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `ctx` is never read
[INFO] [stdout]   --> src/optimizations/unused_blocks.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct UnusedBlocksOptimization {
[INFO] [stdout]    |            ------------------------ field in this struct
[INFO] [stdout] 13 |     ctx: OptimizationContext,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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` profile [unoptimized + debuginfo] target(s) in 2.05s
[INFO] running `Command { std: "docker" "inspect" "fd4b52c1479c23b041ca120f103affe58557779c1087d56c1f9cf8d792d8ff8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd4b52c1479c23b041ca120f103affe58557779c1087d56c1f9cf8d792d8ff8b", kill_on_drop: false }`
[INFO] [stdout] fd4b52c1479c23b041ca120f103affe58557779c1087d56c1f9cf8d792d8ff8b