[INFO] fetching crate alloca 0.4.0...
[INFO] checking alloca-0.4.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate alloca 0.4.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate alloca 0.4.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alloca 0.4.0
[INFO] finished tweaking crates.io crate alloca 0.4.0
[INFO] tweaked toml for crates.io crate alloca 0.4.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate alloca 0.4.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cc v1.0.81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad29220ff669919b3fdac5823cca90ddddbd8c6ac4cabaea28dbfcc599402afe
[INFO] running `Command { std: "docker" "start" "-a" "ad29220ff669919b3fdac5823cca90ddddbd8c6ac4cabaea28dbfcc599402afe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad29220ff669919b3fdac5823cca90ddddbd8c6ac4cabaea28dbfcc599402afe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad29220ff669919b3fdac5823cca90ddddbd8c6ac4cabaea28dbfcc599402afe", kill_on_drop: false }`
[INFO] [stdout] ad29220ff669919b3fdac5823cca90ddddbd8c6ac4cabaea28dbfcc599402afe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97e109d3d1368a6e6489ff20dc6b5ec7f2a5278505c5e0ecb6a315fad3cdccff
[INFO] running `Command { std: "docker" "start" "-a" "97e109d3d1368a6e6489ff20dc6b5ec7f2a5278505c5e0ecb6a315fad3cdccff", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling cc v1.0.81
[INFO] [stderr]    Compiling alloca v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.79s
[INFO] running `Command { std: "docker" "inspect" "97e109d3d1368a6e6489ff20dc6b5ec7f2a5278505c5e0ecb6a315fad3cdccff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97e109d3d1368a6e6489ff20dc6b5ec7f2a5278505c5e0ecb6a315fad3cdccff", kill_on_drop: false }`
[INFO] [stdout] 97e109d3d1368a6e6489ff20dc6b5ec7f2a5278505c5e0ecb6a315fad3cdccff
[INFO] checking alloca-0.4.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate alloca 0.4.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate alloca 0.4.0 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alloca 0.4.0
[INFO] finished tweaking crates.io crate alloca 0.4.0
[INFO] tweaked toml for crates.io crate alloca 0.4.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate alloca 0.4.0 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 743d0308973e06f57e39f5fa67f6e8bc40c6f3ed0a58671183447c7ec6d2a2ca
[INFO] running `Command { std: "docker" "start" "-a" "743d0308973e06f57e39f5fa67f6e8bc40c6f3ed0a58671183447c7ec6d2a2ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "743d0308973e06f57e39f5fa67f6e8bc40c6f3ed0a58671183447c7ec6d2a2ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "743d0308973e06f57e39f5fa67f6e8bc40c6f3ed0a58671183447c7ec6d2a2ca", kill_on_drop: false }`
[INFO] [stdout] 743d0308973e06f57e39f5fa67f6e8bc40c6f3ed0a58671183447c7ec6d2a2ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 574a32be2a8957777b3f37784e5548f079d2e7bbb89228ce623ef10661cc34d5
[INFO] running `Command { std: "docker" "start" "-a" "574a32be2a8957777b3f37784e5548f079d2e7bbb89228ce623ef10661cc34d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling cc v1.0.81
[INFO] [stderr]    Compiling alloca v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]  --> src/main.rs:2:30
[INFO] [stdout]   |
[INFO] [stdout] 2 |     alloca::with_alloca(128, |_mem| {
[INFO] [stdout]   |                              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]   |
[INFO] [stdout] 2 |     alloca::with_alloca(128, |_mem| -> /* Type */ {
[INFO] [stdout]   |                                     +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]  --> src/main.rs:2:30
[INFO] [stdout]   |
[INFO] [stdout] 2 |     alloca::with_alloca(128, |_mem| {
[INFO] [stdout]   |                              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]   |
[INFO] [stdout] 2 |     alloca::with_alloca(128, |_mem| -> /* Type */ {
[INFO] [stdout]   |                                     +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alloca` (bin "alloca") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `alloca` (bin "alloca" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "574a32be2a8957777b3f37784e5548f079d2e7bbb89228ce623ef10661cc34d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "574a32be2a8957777b3f37784e5548f079d2e7bbb89228ce623ef10661cc34d5", kill_on_drop: false }`
[INFO] [stdout] 574a32be2a8957777b3f37784e5548f079d2e7bbb89228ce623ef10661cc34d5