[INFO] cloning repository https://github.com/sassinzz13/multiplication-table-and-factorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sassinzz13/multiplication-table-and-factorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsassinzz13%2Fmultiplication-table-and-factorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsassinzz13%2Fmultiplication-table-and-factorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c7b0369ce4ca8050c38ef62dcc82e8ea6e5a4747
[INFO] checking sassinzz13/multiplication-table-and-factorial against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsassinzz13%2Fmultiplication-table-and-factorial" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sassinzz13/multiplication-table-and-factorial 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 git repo https://github.com/sassinzz13/multiplication-table-and-factorial
[INFO] finished tweaking git repo https://github.com/sassinzz13/multiplication-table-and-factorial
[INFO] tweaked toml for git repo https://github.com/sassinzz13/multiplication-table-and-factorial written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sassinzz13/multiplication-table-and-factorial 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-segmentation v0.1.2
[INFO] [stderr]   Downloaded strcursor v0.2.5
[INFO] [stderr]   Downloaded itertools v0.4.19
[INFO] [stderr]   Downloaded scan-rules v0.1.3
[INFO] [stderr]   Downloaded lazy_static v0.1.16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] c0e268f65235b511f2be27cc3af6eabcf8859f9ac1414f5cc7404501062cc6cd
[INFO] running `Command { std: "docker" "start" "-a" "c0e268f65235b511f2be27cc3af6eabcf8859f9ac1414f5cc7404501062cc6cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0e268f65235b511f2be27cc3af6eabcf8859f9ac1414f5cc7404501062cc6cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0e268f65235b511f2be27cc3af6eabcf8859f9ac1414f5cc7404501062cc6cd", kill_on_drop: false }`
[INFO] [stdout] c0e268f65235b511f2be27cc3af6eabcf8859f9ac1414f5cc7404501062cc6cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] f26e9d732e0ecbe6e966bd9216b1ea33d9e2f2a2e20adb72313bc97acc46ede5
[INFO] running `Command { std: "docker" "start" "-a" "f26e9d732e0ecbe6e966bd9216b1ea33d9e2f2a2e20adb72313bc97acc46ede5", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking unicode-segmentation v0.1.2
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]     Checking lazy_static v0.1.16
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling strcursor v0.2.5
[INFO] [stderr]    Compiling scan-rules v0.1.3
[INFO] [stderr]     Checking getrandom v0.2.8
[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 guessing_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `while` condition
[INFO] [stdout]   --> src/main.rs:25:11
[INFO] [stdout]    |
[INFO] [stdout] 25 |     while (i<=n){
[INFO] [stdout]    |           ^    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 25 -     while (i<=n){
[INFO] [stdout] 25 +     while i<=n {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `while` condition
[INFO] [stdout]   --> src/main.rs:25:11
[INFO] [stdout]    |
[INFO] [stdout] 25 |     while (i<=n){
[INFO] [stdout]    |           ^    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 25 -     while (i<=n){
[INFO] [stdout] 25 +     while i<=n {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 |       let mut results = n*i;
[INFO] [stdout]    |           ----^^^^^^^
[INFO] [stdout]    |           |
[INFO] [stdout]    |           help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 |       let mut results = n*i;
[INFO] [stdout]    |           ----^^^^^^^
[INFO] [stdout]    |           |
[INFO] [stdout]    |           help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "f26e9d732e0ecbe6e966bd9216b1ea33d9e2f2a2e20adb72313bc97acc46ede5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f26e9d732e0ecbe6e966bd9216b1ea33d9e2f2a2e20adb72313bc97acc46ede5", kill_on_drop: false }`
[INFO] [stdout] f26e9d732e0ecbe6e966bd9216b1ea33d9e2f2a2e20adb72313bc97acc46ede5
[INFO] checking sassinzz13/multiplication-table-and-factorial against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsassinzz13%2Fmultiplication-table-and-factorial" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sassinzz13/multiplication-table-and-factorial 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 git repo https://github.com/sassinzz13/multiplication-table-and-factorial
[INFO] finished tweaking git repo https://github.com/sassinzz13/multiplication-table-and-factorial
[INFO] tweaked toml for git repo https://github.com/sassinzz13/multiplication-table-and-factorial written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/sassinzz13/multiplication-table-and-factorial 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] aee4a1f795ae5f8e03ff3d0217b3a6057bb2a4f6e69d259ec16607a8be46da92
[INFO] running `Command { std: "docker" "start" "-a" "aee4a1f795ae5f8e03ff3d0217b3a6057bb2a4f6e69d259ec16607a8be46da92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aee4a1f795ae5f8e03ff3d0217b3a6057bb2a4f6e69d259ec16607a8be46da92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aee4a1f795ae5f8e03ff3d0217b3a6057bb2a4f6e69d259ec16607a8be46da92", kill_on_drop: false }`
[INFO] [stdout] aee4a1f795ae5f8e03ff3d0217b3a6057bb2a4f6e69d259ec16607a8be46da92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 67c045e6bb5e68ff02a149f8db038d2ae8d8cb71ca8a54c8f324a594142979c1
[INFO] running `Command { std: "docker" "start" "-a" "67c045e6bb5e68ff02a149f8db038d2ae8d8cb71ca8a54c8f324a594142979c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking unicode-segmentation v0.1.2
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]     Checking lazy_static v0.1.16
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling strcursor v0.2.5
[INFO] [stderr]    Compiling scan-rules v0.1.3
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/strcursor-0.2.5/src/lib.rs:59:9
[INFO] [stdout]     |
[INFO] [stdout] 59  | /         if cfg!(ndebug) {
[INFO] [stdout] 60  | |             ::util::unreachable()
[INFO] [stdout] 61  | |         } else {
[INFO] [stdout] 62  | |             panic!("entered unreachable code")
[INFO] [stdout] 63  | |         }
[INFO] [stdout]     | |_________^ cannot satisfy `_ -> _`
[INFO] [stdout]     |
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/strcursor-0.2.5/src/grapheme.rs:616:25
[INFO] [stdout]     |
[INFO] [stdout] 616 |                           debug_unreachable!();
[INFO] [stdout]     |                           -------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `debug_unreachable` (in Nightly builds, run with -Z macro-backtrace for more info)
[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 E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `strcursor` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "67c045e6bb5e68ff02a149f8db038d2ae8d8cb71ca8a54c8f324a594142979c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67c045e6bb5e68ff02a149f8db038d2ae8d8cb71ca8a54c8f324a594142979c1", kill_on_drop: false }`
[INFO] [stdout] 67c045e6bb5e68ff02a149f8db038d2ae8d8cb71ca8a54c8f324a594142979c1