[INFO] fetching crate sputnikvm-precompiled-modexp 0.11.0-beta.0...
[INFO] checking sputnikvm-precompiled-modexp-0.11.0-beta.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate sputnikvm-precompiled-modexp 0.11.0-beta.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate sputnikvm-precompiled-modexp 0.11.0-beta.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 sputnikvm-precompiled-modexp 0.11.0-beta.0
[INFO] finished tweaking crates.io crate sputnikvm-precompiled-modexp 0.11.0-beta.0
[INFO] tweaked toml for crates.io crate sputnikvm-precompiled-modexp 0.11.0-beta.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 44 packages
[INFO] [stderr]       Adding arrayvec v0.3.25 (latest: v0.7.4)
[INFO] [stderr]       Adding block-buffer v0.2.0 (latest: v0.10.4)
[INFO] [stderr]       Adding byte-tools v0.2.0 (latest: v0.3.1)
[INFO] [stderr]       Adding digest v0.6.1 (latest: v0.10.7)
[INFO] [stderr]       Adding generic-array v0.8.4 (latest: v1.0.0)
[INFO] [stderr]       Adding lazy_static v0.2.11 (latest: v1.4.0)
[INFO] [stderr]       Adding libsecp256k1 v0.1.3 (latest: v0.7.1)
[INFO] [stderr]       Adding num-bigint v0.1.44 (latest: v0.4.4)
[INFO] [stderr]       Adding odds v0.2.26 (latest: v0.4.0)
[INFO] [stderr]       Adding rand v0.3.23 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding ripemd160 v0.6.0 (latest: v0.10.0)
[INFO] [stderr]       Adding sha2 v0.6.0 (latest: v0.10.8)
[INFO] [stderr]       Adding sha3 v0.6.0 (latest: v0.10.8)
[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 sha2 v0.6.0
[INFO] [stderr]   Downloaded byte-tools v0.2.0
[INFO] [stderr]   Downloaded nodrop v0.1.14
[INFO] [stderr]   Downloaded block-buffer v0.2.0
[INFO] [stderr]   Downloaded digest v0.6.1
[INFO] [stderr]   Downloaded generic-array v0.8.4
[INFO] [stderr]   Downloaded sputnikvm v0.11.0-beta.0
[INFO] [stderr]   Downloaded etcommon-hexutil v0.2.4
[INFO] [stderr]   Downloaded etcommon-trie v0.4.0
[INFO] [stderr]   Downloaded etcommon-bigint v0.2.10
[INFO] [stderr]   Downloaded elastic-array-plus v0.10.0
[INFO] [stderr]   Downloaded etcommon-block-core v0.3.1
[INFO] [stderr]   Downloaded rdrand v0.4.0
[INFO] [stderr]   Downloaded rand v0.4.6
[INFO] [stderr]   Downloaded fuchsia-cprng v0.1.1
[INFO] [stderr]   Downloaded num-bigint v0.1.44
[INFO] [stderr]   Downloaded etcommon-rlp v0.2.5
[INFO] [stderr]   Downloaded etcommon-bloom v0.2.1
[INFO] [stderr]   Downloaded etcommon-block v0.5.2
[INFO] [stderr]   Downloaded secp256k1-plus v0.5.7
[INFO] [stderr]   Downloaded arrayvec v0.3.25
[INFO] [stderr]   Downloaded gcc v0.3.55
[INFO] [stderr]   Downloaded rand_core v0.3.1
[INFO] [stderr]   Downloaded rustc-serialize v0.3.25
[INFO] [stderr]   Downloaded fake-simd v0.1.2
[INFO] [stderr]   Downloaded sha3 v0.6.0
[INFO] [stderr]   Downloaded libsecp256k1 v0.1.3
[INFO] [stderr]   Downloaded rand_core v0.4.2
[INFO] [stderr]   Downloaded ripemd160 v0.6.0
[INFO] [stderr]   Downloaded odds v0.2.26
[INFO] [stderr]   Downloaded lazy_static v0.2.11
[INFO] [stderr]   Downloaded rand v0.3.23
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 171c51e55358c69877c84c668417b7d4ad10f36e93fe0928324f73d938ab2778
[INFO] running `Command { std: "docker" "start" "-a" "171c51e55358c69877c84c668417b7d4ad10f36e93fe0928324f73d938ab2778", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "171c51e55358c69877c84c668417b7d4ad10f36e93fe0928324f73d938ab2778", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "171c51e55358c69877c84c668417b7d4ad10f36e93fe0928324f73d938ab2778", kill_on_drop: false }`
[INFO] [stdout] 171c51e55358c69877c84c668417b7d4ad10f36e93fe0928324f73d938ab2778
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a99c45fab2cc6af2e4d7f4537073a19779b76069e4d91788e5117d21b5da4680
[INFO] running `Command { std: "docker" "start" "-a" "a99c45fab2cc6af2e4d7f4537073a19779b76069e4d91788e5117d21b5da4680", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking elastic-array-plus v0.10.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking etcommon-hexutil v0.2.4
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking odds v0.2.26
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking etcommon-rlp v0.2.5
[INFO] [stderr]     Checking arrayvec v0.3.25
[INFO] [stderr]    Compiling secp256k1-plus v0.5.7
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking generic-array v0.8.4
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking block-buffer v0.2.0
[INFO] [stderr]     Checking digest v0.6.1
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking etcommon-bigint v0.2.10
[INFO] [stderr]     Checking sha3 v0.6.0
[INFO] [stderr]     Checking ripemd160 v0.6.0
[INFO] [stderr]     Checking sha2 v0.6.0
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking etcommon-bloom v0.2.1
[INFO] [stderr]     Checking etcommon-trie v0.4.0
[INFO] [stderr]     Checking etcommon-block-core v0.3.1
[INFO] [stderr]     Checking etcommon-block v0.5.2
[INFO] [stderr]     Checking sputnikvm v0.11.0-beta.0
[INFO] [stderr]     Checking sputnikvm-precompiled-modexp v0.11.0-beta.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.19s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: num-bigint v0.1.44, sputnikvm v0.11.0-beta.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "a99c45fab2cc6af2e4d7f4537073a19779b76069e4d91788e5117d21b5da4680", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a99c45fab2cc6af2e4d7f4537073a19779b76069e4d91788e5117d21b5da4680", kill_on_drop: false }`
[INFO] [stdout] a99c45fab2cc6af2e4d7f4537073a19779b76069e4d91788e5117d21b5da4680
[INFO] checking sputnikvm-precompiled-modexp-0.11.0-beta.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate sputnikvm-precompiled-modexp 0.11.0-beta.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate sputnikvm-precompiled-modexp 0.11.0-beta.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 sputnikvm-precompiled-modexp 0.11.0-beta.0
[INFO] finished tweaking crates.io crate sputnikvm-precompiled-modexp 0.11.0-beta.0
[INFO] tweaked toml for crates.io crate sputnikvm-precompiled-modexp 0.11.0-beta.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 1464ff92b98a4ab16fda7ee668ce8fe3064f7f6d52f822bc81c656b2664fd527
[INFO] running `Command { std: "docker" "start" "-a" "1464ff92b98a4ab16fda7ee668ce8fe3064f7f6d52f822bc81c656b2664fd527", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1464ff92b98a4ab16fda7ee668ce8fe3064f7f6d52f822bc81c656b2664fd527", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1464ff92b98a4ab16fda7ee668ce8fe3064f7f6d52f822bc81c656b2664fd527", kill_on_drop: false }`
[INFO] [stdout] 1464ff92b98a4ab16fda7ee668ce8fe3064f7f6d52f822bc81c656b2664fd527
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] a99c020fa91242206a2a32a0a3566721e95675f5b67009a56f0a44afcc6330fe
[INFO] running `Command { std: "docker" "start" "-a" "a99c020fa91242206a2a32a0a3566721e95675f5b67009a56f0a44afcc6330fe", kill_on_drop: false }`
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking etcommon-hexutil v0.2.4
[INFO] [stderr]     Checking elastic-array-plus v0.10.0
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking odds v0.2.26
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking arrayvec v0.3.25
[INFO] [stderr]     Checking etcommon-rlp v0.2.5
[INFO] [stderr]    Compiling secp256k1-plus v0.5.7
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rustc-serialize-0.3.25/src/json.rs:1387:20
[INFO] [stdout]      |
[INFO] [stdout] 1387 |             _ => { panic!(); }
[INFO] [stdout]      |                    ^^^^^^^^ cannot infer type
[INFO] [stdout]      |
[INFO] [stdout]      = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking generic-array v0.8.4
[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 `rustc-serialize` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "a99c020fa91242206a2a32a0a3566721e95675f5b67009a56f0a44afcc6330fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a99c020fa91242206a2a32a0a3566721e95675f5b67009a56f0a44afcc6330fe", kill_on_drop: false }`
[INFO] [stdout] a99c020fa91242206a2a32a0a3566721e95675f5b67009a56f0a44afcc6330fe