[INFO] fetching crate nson 0.9.1...
[INFO] checking nson-0.9.1 against master#af3c6e733a40e671550e0f0f5aeecaa13772ba56 for pr-74989
[INFO] extracting crate nson 0.9.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate nson 0.9.1 on toolchain af3c6e733a40e671550e0f0f5aeecaa13772ba56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nson 0.9.1
[INFO] removed 1 missing tests
[INFO] finished tweaking crates.io crate nson 0.9.1
[INFO] tweaked toml for crates.io crate nson 0.9.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate nson 0.9.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7741d9e556f1b95aa754d7acbb0bcbfd9583cfbf5b27d88ebd94775b2cd82116
[INFO] running `Command { std: "docker" "start" "-a" "7741d9e556f1b95aa754d7acbb0bcbfd9583cfbf5b27d88ebd94775b2cd82116", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7741d9e556f1b95aa754d7acbb0bcbfd9583cfbf5b27d88ebd94775b2cd82116", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7741d9e556f1b95aa754d7acbb0bcbfd9583cfbf5b27d88ebd94775b2cd82116", kill_on_drop: false }`
[INFO] [stdout] 7741d9e556f1b95aa754d7acbb0bcbfd9583cfbf5b27d88ebd94775b2cd82116
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a501a0f7e11470c1c4c164738bdc93255d0dd4d4c23e32d3b45fdb048810e373
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a501a0f7e11470c1c4c164738bdc93255d0dd4d4c23e32d3b45fdb048810e373", 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] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking base64 v0.12.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling indexmap v1.5.1
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking serde_json v1.0.50
[INFO] [stderr]     Checking serde_bytes v0.11.3
[INFO] [stderr]     Checking nson v0.9.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/lib.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         panic!("{:?}", nson);
[INFO] [stdout]    |         --------------------- any code following this expression is unreachable
[INFO] [stdout] 87 | 
[INFO] [stdout] 88 |         let foo2: Foo = from_nson(nson).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.20s
[INFO] running `Command { std: "docker" "inspect" "a501a0f7e11470c1c4c164738bdc93255d0dd4d4c23e32d3b45fdb048810e373", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a501a0f7e11470c1c4c164738bdc93255d0dd4d4c23e32d3b45fdb048810e373", kill_on_drop: false }`
[INFO] [stdout] a501a0f7e11470c1c4c164738bdc93255d0dd4d4c23e32d3b45fdb048810e373
