[INFO] cloning repository https://github.com/jeffreyeast/ppl
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeffreyeast/ppl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffreyeast%2Fppl", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffreyeast%2Fppl'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6b064705602a2151c7329391f3442a698b348a9c
[INFO] checking jeffreyeast/ppl against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffreyeast%2Fppl" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeffreyeast/ppl 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/jeffreyeast/ppl
[INFO] finished tweaking git repo https://github.com/jeffreyeast/ppl
[INFO] tweaked toml for git repo https://github.com/jeffreyeast/ppl written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jeffreyeast/ppl 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 0f9e96b1c050486b3d76491a8efd5680b037c389940126cf7099c83d8ed1cd0c
[INFO] running `Command { std: "docker" "start" "-a" "0f9e96b1c050486b3d76491a8efd5680b037c389940126cf7099c83d8ed1cd0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f9e96b1c050486b3d76491a8efd5680b037c389940126cf7099c83d8ed1cd0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f9e96b1c050486b3d76491a8efd5680b037c389940126cf7099c83d8ed1cd0c", kill_on_drop: false }`
[INFO] [stdout] 0f9e96b1c050486b3d76491a8efd5680b037c389940126cf7099c83d8ed1cd0c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] f83722cd3dbe738e06dfb0c7f4dc71181cd435a0c626844f83e2a81de29e203d
[INFO] running `Command { std: "docker" "start" "-a" "f83722cd3dbe738e06dfb0c7f4dc71181cd435a0c626844f83e2a81de29e203d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]     Checking strum v0.25.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling syn v2.0.37
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling strum_macros v0.25.2
[INFO] [stderr]     Checking ppl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias `StatementBlockTag` is never used
[INFO] [stdout]   --> src/execution/runtime/invocation.rs:34:6
[INFO] [stdout]    |
[INFO] [stdout] 34 | type StatementBlockTag = usize;
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_function_return_line_number` is never used
[INFO] [stdout]    --> src/execution/runtime/invocation.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 36  | impl Invocation {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn get_function_return_line_number(&self) -> LineNumber {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/execution/value/format/state_machine.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct State<T> {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 10 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `State` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `SimpleOperator` is never constructed
[INFO] [stdout]    --> src/lexical.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 93  | pub enum CharacterClass {
[INFO] [stdout]     |          -------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 105 |     SimpleOperator,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CharacterClass` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `StatementBlockTag` is never used
[INFO] [stdout]   --> src/execution/runtime/invocation.rs:34:6
[INFO] [stdout]    |
[INFO] [stdout] 34 | type StatementBlockTag = usize;
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_function_return_line_number` is never used
[INFO] [stdout]    --> src/execution/runtime/invocation.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 36  | impl Invocation {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn get_function_return_line_number(&self) -> LineNumber {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/execution/value/format/state_machine.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct State<T> {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 10 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `State` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `SimpleOperator` is never constructed
[INFO] [stdout]    --> src/lexical.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 93  | pub enum CharacterClass {
[INFO] [stdout]     |          -------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 105 |     SimpleOperator,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CharacterClass` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.40s
[INFO] running `Command { std: "docker" "inspect" "f83722cd3dbe738e06dfb0c7f4dc71181cd435a0c626844f83e2a81de29e203d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f83722cd3dbe738e06dfb0c7f4dc71181cd435a0c626844f83e2a81de29e203d", kill_on_drop: false }`
[INFO] [stdout] f83722cd3dbe738e06dfb0c7f4dc71181cd435a0c626844f83e2a81de29e203d
[INFO] checking jeffreyeast/ppl against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffreyeast%2Fppl" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeffreyeast/ppl 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/jeffreyeast/ppl
[INFO] finished tweaking git repo https://github.com/jeffreyeast/ppl
[INFO] tweaked toml for git repo https://github.com/jeffreyeast/ppl written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/jeffreyeast/ppl 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] cb5f950d367436cbf4678b479036f91d63c8c0e74666ccb30b653bbee4c1fcc7
[INFO] running `Command { std: "docker" "start" "-a" "cb5f950d367436cbf4678b479036f91d63c8c0e74666ccb30b653bbee4c1fcc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb5f950d367436cbf4678b479036f91d63c8c0e74666ccb30b653bbee4c1fcc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb5f950d367436cbf4678b479036f91d63c8c0e74666ccb30b653bbee4c1fcc7", kill_on_drop: false }`
[INFO] [stdout] cb5f950d367436cbf4678b479036f91d63c8c0e74666ccb30b653bbee4c1fcc7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] dca577323bc08fa76995bf42c6a4bfa8c818c2b111d25b52b2ba89a20dec7f18
[INFO] running `Command { std: "docker" "start" "-a" "dca577323bc08fa76995bf42c6a4bfa8c818c2b111d25b52b2ba89a20dec7f18", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]     Checking strum v0.25.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling syn v2.0.37
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling strum_macros v0.25.2
[INFO] [stderr]     Checking ppl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias `StatementBlockTag` is never used
[INFO] [stdout]   --> src/execution/runtime/invocation.rs:34:6
[INFO] [stdout]    |
[INFO] [stdout] 34 | type StatementBlockTag = usize;
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_function_return_line_number` is never used
[INFO] [stdout]    --> src/execution/runtime/invocation.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 36  | impl Invocation {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn get_function_return_line_number(&self) -> LineNumber {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/execution/value/format/state_machine.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct State<T> {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 10 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `State` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `SimpleOperator` is never constructed
[INFO] [stdout]    --> src/lexical.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 93  | pub enum CharacterClass {
[INFO] [stdout]     |          -------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 105 |     SimpleOperator,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CharacterClass` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `StatementBlockTag` is never used
[INFO] [stdout]   --> src/execution/runtime/invocation.rs:34:6
[INFO] [stdout]    |
[INFO] [stdout] 34 | type StatementBlockTag = usize;
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_function_return_line_number` is never used
[INFO] [stdout]    --> src/execution/runtime/invocation.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 36  | impl Invocation {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn get_function_return_line_number(&self) -> LineNumber {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/execution/value/format/state_machine.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct State<T> {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 10 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `State` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `SimpleOperator` is never constructed
[INFO] [stdout]    --> src/lexical.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 93  | pub enum CharacterClass {
[INFO] [stdout]     |          -------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 105 |     SimpleOperator,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CharacterClass` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.21s
[INFO] running `Command { std: "docker" "inspect" "dca577323bc08fa76995bf42c6a4bfa8c818c2b111d25b52b2ba89a20dec7f18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dca577323bc08fa76995bf42c6a4bfa8c818c2b111d25b52b2ba89a20dec7f18", kill_on_drop: false }`
[INFO] [stdout] dca577323bc08fa76995bf42c6a4bfa8c818c2b111d25b52b2ba89a20dec7f18