[INFO] cloning repository https://github.com/T0kers/Zepto
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/T0kers/Zepto" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FT0kers%2FZepto", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FT0kers%2FZepto'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9f49fc53932053c0b8998d5acf704300b0b08670
[INFO] checking T0kers/Zepto against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FT0kers%2FZepto" "/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/T0kers/Zepto 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/T0kers/Zepto
[INFO] finished tweaking git repo https://github.com/T0kers/Zepto
[INFO] tweaked toml for git repo https://github.com/T0kers/Zepto written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/T0kers/Zepto 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] 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] 86d3da6421aa65d1534d1f6235fa3afdb03362788d4c77e226774678a014691e
[INFO] running `Command { std: "docker" "start" "-a" "86d3da6421aa65d1534d1f6235fa3afdb03362788d4c77e226774678a014691e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86d3da6421aa65d1534d1f6235fa3afdb03362788d4c77e226774678a014691e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86d3da6421aa65d1534d1f6235fa3afdb03362788d4c77e226774678a014691e", kill_on_drop: false }`
[INFO] [stdout] 86d3da6421aa65d1534d1f6235fa3afdb03362788d4c77e226774678a014691e
[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] c50d9ba718bed6a2628d8b3d53ddeea6c0894603c1c2707c0ddca44b218cfbac
[INFO] running `Command { std: "docker" "start" "-a" "c50d9ba718bed6a2628d8b3d53ddeea6c0894603c1c2707c0ddca44b218cfbac", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking zepto v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `UpValueLocation`
[INFO] [stdout]  --> src/compiler.rs:2:73
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::{chunk::{Chunk, OpCode}, errors::VMError, object::{Function, UpValueLocation}, scanner::{Scanner, Token, TokenKind}, value::{N...
[INFO] [stdout]   |                                                                         ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `UpValueLocation`
[INFO] [stdout]  --> src/compiler.rs:2:73
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::{chunk::{Chunk, OpCode}, errors::VMError, object::{Function, UpValueLocation}, scanner::{Scanner, Token, TokenKind}, value::{N...
[INFO] [stdout]   |                                                                         ^^^^^^^^^^^^^^^
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.55s
[INFO] running `Command { std: "docker" "inspect" "c50d9ba718bed6a2628d8b3d53ddeea6c0894603c1c2707c0ddca44b218cfbac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c50d9ba718bed6a2628d8b3d53ddeea6c0894603c1c2707c0ddca44b218cfbac", kill_on_drop: false }`
[INFO] [stdout] c50d9ba718bed6a2628d8b3d53ddeea6c0894603c1c2707c0ddca44b218cfbac
[INFO] checking T0kers/Zepto against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FT0kers%2FZepto" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/T0kers/Zepto on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/T0kers/Zepto
[INFO] finished tweaking git repo https://github.com/T0kers/Zepto
[INFO] tweaked toml for git repo https://github.com/T0kers/Zepto written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/T0kers/Zepto 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a87fc9e58ce0891054845dccc7dc8cad654a36d40c7fc12c01a45adab41f4d6b
[INFO] running `Command { std: "docker" "start" "-a" "a87fc9e58ce0891054845dccc7dc8cad654a36d40c7fc12c01a45adab41f4d6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a87fc9e58ce0891054845dccc7dc8cad654a36d40c7fc12c01a45adab41f4d6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a87fc9e58ce0891054845dccc7dc8cad654a36d40c7fc12c01a45adab41f4d6b", kill_on_drop: false }`
[INFO] [stdout] a87fc9e58ce0891054845dccc7dc8cad654a36d40c7fc12c01a45adab41f4d6b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 510b0d658cf8211272c6a6774e69cda8e1c0c13539d37669b99d8fb25eb777aa
[INFO] running `Command { std: "docker" "start" "-a" "510b0d658cf8211272c6a6774e69cda8e1c0c13539d37669b99d8fb25eb777aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking zepto v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `UpValueLocation`
[INFO] [stdout]  --> src/compiler.rs:2:73
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::{chunk::{Chunk, OpCode}, errors::VMError, object::{Function, UpValueLocation}, scanner::{Scanner, Token, TokenKind}, value::{N...
[INFO] [stdout]   |                                                                         ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `UpValueLocation`
[INFO] [stdout]  --> src/compiler.rs:2:73
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::{chunk::{Chunk, OpCode}, errors::VMError, object::{Function, UpValueLocation}, scanner::{Scanner, Token, TokenKind}, value::{N...
[INFO] [stdout]   |                                                                         ^^^^^^^^^^^^^^^
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.29s
[INFO] running `Command { std: "docker" "inspect" "510b0d658cf8211272c6a6774e69cda8e1c0c13539d37669b99d8fb25eb777aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "510b0d658cf8211272c6a6774e69cda8e1c0c13539d37669b99d8fb25eb777aa", kill_on_drop: false }`
[INFO] [stdout] 510b0d658cf8211272c6a6774e69cda8e1c0c13539d37669b99d8fb25eb777aa