[INFO] cloning repository https://github.com/SamuelMcGowan/papa
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SamuelMcGowan/papa" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSamuelMcGowan%2Fpapa", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSamuelMcGowan%2Fpapa'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a8875c90a8361190a42e29239cae9fa669f7cd67
[INFO] checking SamuelMcGowan/papa against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSamuelMcGowan%2Fpapa" "/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/SamuelMcGowan/papa on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SamuelMcGowan/papa
[INFO] finished tweaking git repo https://github.com/SamuelMcGowan/papa
[INFO] tweaked toml for git repo https://github.com/SamuelMcGowan/papa written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/SamuelMcGowan/papa 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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded derive-where v1.2.1
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ccfe2f5c542cfe4e0c5714b2cf79ae8cfeb6007d670414958f9988188f24bcf
[INFO] running `Command { std: "docker" "start" "-a" "8ccfe2f5c542cfe4e0c5714b2cf79ae8cfeb6007d670414958f9988188f24bcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ccfe2f5c542cfe4e0c5714b2cf79ae8cfeb6007d670414958f9988188f24bcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ccfe2f5c542cfe4e0c5714b2cf79ae8cfeb6007d670414958f9988188f24bcf", kill_on_drop: false }`
[INFO] [stdout] 8ccfe2f5c542cfe4e0c5714b2cf79ae8cfeb6007d670414958f9988188f24bcf
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61f9762c7b541be00e7a2bb32a4d39e7a665983bcdeac27967c5d51bb32d4c0c
[INFO] running `Command { std: "docker" "start" "-a" "61f9762c7b541be00e7a2bb32a4d39e7a665983bcdeac27967c5d51bb32d4c0c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling syn v2.0.27
[INFO] [stderr]    Compiling derive-where v1.2.1
[INFO] [stderr]     Checking papa v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> examples/json.rs:42:21
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn parse_object<'a>(expr: impl Parser<&'a str, Json, ()>) -> impl Parser<&'a str, Json, ()> {
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> examples/json.rs:46:20
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn parse_array<'a>(expr: impl Parser<&'a str, Json, ()>) -> impl Parser<&'a str, Json, ()> {
[INFO] [stdout]    |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> examples/json.rs:25:10
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Bool(bool),
[INFO] [stdout]    |     ---- ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Json` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Bool(()),
[INFO] [stdout]    |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Object`, `Array`, `String`, `Integer`, and `Float` are never constructed
[INFO] [stdout]   --> examples/json.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | enum Json {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 20 |     Object(HashMap<String, Json>),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 21 |     Array(Vec<Json>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 22 |     String(String),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 23 |     Integer(u64),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 24 |     Float(f64),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Json` has a derived impl for the trait `Debug`, but this is 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 7.71s
[INFO] running `Command { std: "docker" "inspect" "61f9762c7b541be00e7a2bb32a4d39e7a665983bcdeac27967c5d51bb32d4c0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61f9762c7b541be00e7a2bb32a4d39e7a665983bcdeac27967c5d51bb32d4c0c", kill_on_drop: false }`
[INFO] [stdout] 61f9762c7b541be00e7a2bb32a4d39e7a665983bcdeac27967c5d51bb32d4c0c
[INFO] checking SamuelMcGowan/papa against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSamuelMcGowan%2Fpapa" "/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/SamuelMcGowan/papa on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SamuelMcGowan/papa
[INFO] finished tweaking git repo https://github.com/SamuelMcGowan/papa
[INFO] tweaked toml for git repo https://github.com/SamuelMcGowan/papa written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/SamuelMcGowan/papa 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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d2da72e907ced1e9948a32fe4268f3257b66c2ba10fbe4801b84d8a63c775b6
[INFO] running `Command { std: "docker" "start" "-a" "5d2da72e907ced1e9948a32fe4268f3257b66c2ba10fbe4801b84d8a63c775b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d2da72e907ced1e9948a32fe4268f3257b66c2ba10fbe4801b84d8a63c775b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d2da72e907ced1e9948a32fe4268f3257b66c2ba10fbe4801b84d8a63c775b6", kill_on_drop: false }`
[INFO] [stdout] 5d2da72e907ced1e9948a32fe4268f3257b66c2ba10fbe4801b84d8a63c775b6
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cd09c90747b537a77940b97b2c91434b7976d88001b0ebe11d60d37bc0c7a81
[INFO] running `Command { std: "docker" "start" "-a" "6cd09c90747b537a77940b97b2c91434b7976d88001b0ebe11d60d37bc0c7a81", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]    Compiling syn v2.0.27
[INFO] [stderr]    Compiling derive-where v1.2.1
[INFO] [stderr]     Checking papa v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> examples/json.rs:42:21
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn parse_object<'a>(expr: impl Parser<&'a str, Json, ()>) -> impl Parser<&'a str, Json, ()> {
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> examples/json.rs:46:20
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn parse_array<'a>(expr: impl Parser<&'a str, Json, ()>) -> impl Parser<&'a str, Json, ()> {
[INFO] [stdout]    |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> examples/json.rs:25:10
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Bool(bool),
[INFO] [stdout]    |     ---- ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Json` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Bool(()),
[INFO] [stdout]    |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Object`, `Array`, `String`, `Integer`, and `Float` are never constructed
[INFO] [stdout]   --> examples/json.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | enum Json {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 20 |     Object(HashMap<String, Json>),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 21 |     Array(Vec<Json>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 22 |     String(String),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 23 |     Integer(u64),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 24 |     Float(f64),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Json` has a derived impl for the trait `Debug`, but this is 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 6.78s
[INFO] running `Command { std: "docker" "inspect" "6cd09c90747b537a77940b97b2c91434b7976d88001b0ebe11d60d37bc0c7a81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cd09c90747b537a77940b97b2c91434b7976d88001b0ebe11d60d37bc0c7a81", kill_on_drop: false }`
[INFO] [stdout] 6cd09c90747b537a77940b97b2c91434b7976d88001b0ebe11d60d37bc0c7a81