[INFO] fetching crate nop-json 2.0.5...
[INFO] testing nop-json-2.0.5 against master#9e136a30a965bf4e63f03095c57df7257bf96fd6 for pr-134530
[INFO] extracting crate nop-json 2.0.5 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate nop-json 2.0.5 on toolchain 9e136a30a965bf4e63f03095c57df7257bf96fd6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nop-json 2.0.5
[INFO] finished tweaking crates.io crate nop-json 2.0.5
[INFO] tweaked toml for crates.io crate nop-json 2.0.5 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nop-json-derive v2.0.5
[INFO] [stderr]   Downloaded read_iter v0.1.2
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bce47a8b2ea84e287b38bebb99572161e4ac38d8e96c66f16e7a30dc1ad730e2
[INFO] running `Command { std: "docker" "start" "-a" "bce47a8b2ea84e287b38bebb99572161e4ac38d8e96c66f16e7a30dc1ad730e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bce47a8b2ea84e287b38bebb99572161e4ac38d8e96c66f16e7a30dc1ad730e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bce47a8b2ea84e287b38bebb99572161e4ac38d8e96c66f16e7a30dc1ad730e2", kill_on_drop: false }`
[INFO] [stdout] bce47a8b2ea84e287b38bebb99572161e4ac38d8e96c66f16e7a30dc1ad730e2
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd44a801b08d6123e6fa96e8e79f6c3db82f1fca8bc0120ba7fe2c648413a859
[INFO] running `Command { std: "docker" "start" "-a" "fd44a801b08d6123e6fa96e8e79f6c3db82f1fca8bc0120ba7fe2c648413a859", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling numtoa v0.2.4
[INFO] [stderr]    Compiling nop-json-derive v2.0.5
[INFO] [stderr]    Compiling nop-json v2.0.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: private item shadows public glob re-export
[INFO] [stdout]  --> src/write_to_json.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::debug_to_json::DebugToJson;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the name `DebugToJson` in the macro namespace is supposed to be publicly re-exported here
[INFO] [stdout]  --> src/write_to_json.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub use nop_json_derive::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: but the private item here shadows it
[INFO] [stdout]  --> src/write_to_json.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::debug_to_json::DebugToJson;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   = note: `#[warn(hidden_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:1169:4
[INFO] [stdout]      |
[INFO] [stdout] 1169 |             &mut buffer[pos+len .. pos+len+e].copy_from_slice(&FORMAT_NUM_WIDTH_Z[0 .. e]);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1169 |             let _ = &mut buffer[pos+len .. pos+len+e].copy_from_slice(&FORMAT_NUM_WIDTH_Z[0 .. e]);
[INFO] [stdout]      |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:1184:4
[INFO] [stdout]      |
[INFO] [stdout] 1184 |             &mut buffer[pos .. pos+e-len+2].copy_from_slice(&FORMAT_NUM_WIDTH_0Z[0 .. e-len+2]);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1184 |             let _ = &mut buffer[pos .. pos+e-len+2].copy_from_slice(&FORMAT_NUM_WIDTH_0Z[0 .. e-len+2]);
[INFO] [stdout]      |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:1200:4
[INFO] [stdout]      |
[INFO] [stdout] 1200 |             &mut buffer[len .. len+exponent_str.len()].copy_from_slice(exponent_str);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1200 |             let _ = &mut buffer[len .. len+exponent_str.len()].copy_from_slice(exponent_str);
[INFO] [stdout]      |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:2035:6
[INFO] [stdout]      |
[INFO] [stdout] 2035 |             {    &mut self.buffer[0 .. 4].copy_from_slice(b"null");
[INFO] [stdout]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 2035 |             {    let _ = &mut self.buffer[0 .. 4].copy_from_slice(b"null");
[INFO] [stdout]      |                  +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:2039:6
[INFO] [stdout]      |
[INFO] [stdout] 2039 |             {    &mut self.buffer[0 .. 5].copy_from_slice(b"false");
[INFO] [stdout]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 2039 |             {    let _ = &mut self.buffer[0 .. 5].copy_from_slice(b"false");
[INFO] [stdout]      |                  +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:2043:6
[INFO] [stdout]      |
[INFO] [stdout] 2043 |             {    &mut self.buffer[0 .. 4].copy_from_slice(b"true");
[INFO] [stdout]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 2043 |             {    let _ = &mut self.buffer[0 .. 4].copy_from_slice(b"true");
[INFO] [stdout]      |                  +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/debug_to_json.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 &mut buffer[0 .. mantissa.len()].copy_from_slice(&mantissa);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let _ = &mut buffer[0 .. mantissa.len()].copy_from_slice(&mantissa);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.53s
[INFO] running `Command { std: "docker" "inspect" "fd44a801b08d6123e6fa96e8e79f6c3db82f1fca8bc0120ba7fe2c648413a859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd44a801b08d6123e6fa96e8e79f6c3db82f1fca8bc0120ba7fe2c648413a859", kill_on_drop: false }`
[INFO] [stdout] fd44a801b08d6123e6fa96e8e79f6c3db82f1fca8bc0120ba7fe2c648413a859
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 910ed7de22e001b1ac0f866df2c604ecc14054b7fec299d379cc58c47040617a
[INFO] running `Command { std: "docker" "start" "-a" "910ed7de22e001b1ac0f866df2c604ecc14054b7fec299d379cc58c47040617a", kill_on_drop: false }`
[INFO] [stderr]    Compiling read_iter v0.1.2
[INFO] [stdout] warning: private item shadows public glob re-export
[INFO] [stdout]  --> src/write_to_json.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::debug_to_json::DebugToJson;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the name `DebugToJson` in the macro namespace is supposed to be publicly re-exported here
[INFO] [stdout]  --> src/write_to_json.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub use nop_json_derive::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: but the private item here shadows it
[INFO] [stdout]  --> src/write_to_json.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::debug_to_json::DebugToJson;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   = note: `#[warn(hidden_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:1169:4
[INFO] [stdout]      |
[INFO] [stdout] 1169 |             &mut buffer[pos+len .. pos+len+e].copy_from_slice(&FORMAT_NUM_WIDTH_Z[0 .. e]);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1169 |             let _ = &mut buffer[pos+len .. pos+len+e].copy_from_slice(&FORMAT_NUM_WIDTH_Z[0 .. e]);
[INFO] [stdout]      |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:1184:4
[INFO] [stdout]      |
[INFO] [stdout] 1184 |             &mut buffer[pos .. pos+e-len+2].copy_from_slice(&FORMAT_NUM_WIDTH_0Z[0 .. e-len+2]);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1184 |             let _ = &mut buffer[pos .. pos+e-len+2].copy_from_slice(&FORMAT_NUM_WIDTH_0Z[0 .. e-len+2]);
[INFO] [stdout]      |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:1200:4
[INFO] [stdout]      |
[INFO] [stdout] 1200 |             &mut buffer[len .. len+exponent_str.len()].copy_from_slice(exponent_str);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1200 |             let _ = &mut buffer[len .. len+exponent_str.len()].copy_from_slice(exponent_str);
[INFO] [stdout]      |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:2035:6
[INFO] [stdout]      |
[INFO] [stdout] 2035 |             {    &mut self.buffer[0 .. 4].copy_from_slice(b"null");
[INFO] [stdout]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 2035 |             {    let _ = &mut self.buffer[0 .. 4].copy_from_slice(b"null");
[INFO] [stdout]      |                  +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:2039:6
[INFO] [stdout]      |
[INFO] [stdout] 2039 |             {    &mut self.buffer[0 .. 5].copy_from_slice(b"false");
[INFO] [stdout]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 2039 |             {    let _ = &mut self.buffer[0 .. 5].copy_from_slice(b"false");
[INFO] [stdout]      |                  +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:2043:6
[INFO] [stdout]      |
[INFO] [stdout] 2043 |             {    &mut self.buffer[0 .. 4].copy_from_slice(b"true");
[INFO] [stdout]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 2043 |             {    let _ = &mut self.buffer[0 .. 4].copy_from_slice(b"true");
[INFO] [stdout]      |                  +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/debug_to_json.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 &mut buffer[0 .. mantissa.len()].copy_from_slice(&mantissa);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let _ = &mut buffer[0 .. mantissa.len()].copy_from_slice(&mantissa);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling nop-json v2.0.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: private item shadows public glob re-export
[INFO] [stdout]  --> src/write_to_json.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::debug_to_json::DebugToJson;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the name `DebugToJson` in the macro namespace is supposed to be publicly re-exported here
[INFO] [stdout]  --> src/write_to_json.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub use nop_json_derive::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: but the private item here shadows it
[INFO] [stdout]  --> src/write_to_json.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::debug_to_json::DebugToJson;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   = note: `#[warn(hidden_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:1169:4
[INFO] [stdout]      |
[INFO] [stdout] 1169 |             &mut buffer[pos+len .. pos+len+e].copy_from_slice(&FORMAT_NUM_WIDTH_Z[0 .. e]);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1169 |             let _ = &mut buffer[pos+len .. pos+len+e].copy_from_slice(&FORMAT_NUM_WIDTH_Z[0 .. e]);
[INFO] [stdout]      |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:1184:4
[INFO] [stdout]      |
[INFO] [stdout] 1184 |             &mut buffer[pos .. pos+e-len+2].copy_from_slice(&FORMAT_NUM_WIDTH_0Z[0 .. e-len+2]);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1184 |             let _ = &mut buffer[pos .. pos+e-len+2].copy_from_slice(&FORMAT_NUM_WIDTH_0Z[0 .. e-len+2]);
[INFO] [stdout]      |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:1200:4
[INFO] [stdout]      |
[INFO] [stdout] 1200 |             &mut buffer[len .. len+exponent_str.len()].copy_from_slice(exponent_str);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1200 |             let _ = &mut buffer[len .. len+exponent_str.len()].copy_from_slice(exponent_str);
[INFO] [stdout]      |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:2035:6
[INFO] [stdout]      |
[INFO] [stdout] 2035 |             {    &mut self.buffer[0 .. 4].copy_from_slice(b"null");
[INFO] [stdout]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 2035 |             {    let _ = &mut self.buffer[0 .. 4].copy_from_slice(b"null");
[INFO] [stdout]      |                  +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:2039:6
[INFO] [stdout]      |
[INFO] [stdout] 2039 |             {    &mut self.buffer[0 .. 5].copy_from_slice(b"false");
[INFO] [stdout]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 2039 |             {    let _ = &mut self.buffer[0 .. 5].copy_from_slice(b"false");
[INFO] [stdout]      |                  +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/nop_json.rs:2043:6
[INFO] [stdout]      |
[INFO] [stdout] 2043 |             {    &mut self.buffer[0 .. 4].copy_from_slice(b"true");
[INFO] [stdout]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 2043 |             {    let _ = &mut self.buffer[0 .. 4].copy_from_slice(b"true");
[INFO] [stdout]      |                  +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/debug_to_json.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 &mut buffer[0 .. mantissa.len()].copy_from_slice(&mantissa);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let _ = &mut buffer[0 .. mantissa.len()].copy_from_slice(&mantissa);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.09s
[INFO] running `Command { std: "docker" "inspect" "910ed7de22e001b1ac0f866df2c604ecc14054b7fec299d379cc58c47040617a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "910ed7de22e001b1ac0f866df2c604ecc14054b7fec299d379cc58c47040617a", kill_on_drop: false }`
[INFO] [stdout] 910ed7de22e001b1ac0f866df2c604ecc14054b7fec299d379cc58c47040617a
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9e136a30a965bf4e63f03095c57df7257bf96fd6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ed376da304c1202fabbbc4cd005e575c6cf2e7e77af9dcde4b39bb114bb6adbf
[INFO] running `Command { std: "docker" "start" "-a" "ed376da304c1202fabbbc4cd005e575c6cf2e7e77af9dcde4b39bb114bb6adbf", kill_on_drop: false }`
[INFO] [stderr] warning: private item shadows public glob re-export
[INFO] [stderr]  --> src/write_to_json.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::debug_to_json::DebugToJson;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: the name `DebugToJson` in the macro namespace is supposed to be publicly re-exported here
[INFO] [stderr]  --> src/write_to_json.rs:1:9
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub use nop_json_derive::*;
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] note: but the private item here shadows it
[INFO] [stderr]  --> src/write_to_json.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::debug_to_json::DebugToJson;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   = note: `#[warn(hidden_glob_reexports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]     --> src/nop_json.rs:1169:4
[INFO] [stderr]      |
[INFO] [stderr] 1169 |             &mut buffer[pos+len .. pos+len+e].copy_from_slice(&FORMAT_NUM_WIDTH_Z[0 .. e]);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]      |
[INFO] [stderr] 1169 |             let _ = &mut buffer[pos+len .. pos+len+e].copy_from_slice(&FORMAT_NUM_WIDTH_Z[0 .. e]);
[INFO] [stderr]      |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]     --> src/nop_json.rs:1184:4
[INFO] [stderr]      |
[INFO] [stderr] 1184 |             &mut buffer[pos .. pos+e-len+2].copy_from_slice(&FORMAT_NUM_WIDTH_0Z[0 .. e-len+2]);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]      |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]      |
[INFO] [stderr] 1184 |             let _ = &mut buffer[pos .. pos+e-len+2].copy_from_slice(&FORMAT_NUM_WIDTH_0Z[0 .. e-len+2]);
[INFO] [stderr]      |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]     --> src/nop_json.rs:1200:4
[INFO] [stderr]      |
[INFO] [stderr] 1200 |             &mut buffer[len .. len+exponent_str.len()].copy_from_slice(exponent_str);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]      |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]      |
[INFO] [stderr] 1200 |             let _ = &mut buffer[len .. len+exponent_str.len()].copy_from_slice(exponent_str);
[INFO] [stderr]      |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]     --> src/nop_json.rs:2035:6
[INFO] [stderr]      |
[INFO] [stderr] 2035 |             {    &mut self.buffer[0 .. 4].copy_from_slice(b"null");
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]      |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]      |
[INFO] [stderr] 2035 |             {    let _ = &mut self.buffer[0 .. 4].copy_from_slice(b"null");
[INFO] [stderr]      |                  +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]     --> src/nop_json.rs:2039:6
[INFO] [stderr]      |
[INFO] [stderr] 2039 |             {    &mut self.buffer[0 .. 5].copy_from_slice(b"false");
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]      |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]      |
[INFO] [stderr] 2039 |             {    let _ = &mut self.buffer[0 .. 5].copy_from_slice(b"false");
[INFO] [stderr]      |                  +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]     --> src/nop_json.rs:2043:6
[INFO] [stderr]      |
[INFO] [stderr] 2043 |             {    &mut self.buffer[0 .. 4].copy_from_slice(b"true");
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]      |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]      |
[INFO] [stderr] 2043 |             {    let _ = &mut self.buffer[0 .. 4].copy_from_slice(b"true");
[INFO] [stderr]      |                  +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/debug_to_json.rs:176:5
[INFO] [stderr]     |
[INFO] [stderr] 176 |                 &mut buffer[0 .. mantissa.len()].copy_from_slice(&mantissa);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 176 |                 let _ = &mut buffer[0 .. mantissa.len()].copy_from_slice(&mantissa);
[INFO] [stderr]     |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `nop-json` (lib) generated 8 warnings
[INFO] [stderr] warning: `nop-json` (lib test) generated 8 warnings (8 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/nop_json-e5d68a9e950f1ab3)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/all.rs (/opt/rustwide/target/debug/deps/all-7a0c767db3f8690f)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test test_bytes ... ok
[INFO] [stdout] test test_number ... ok
[INFO] [stdout] test test_escape ... ok
[INFO] [stdout] test test_escape_bytes ... ok
[INFO] [stdout] test test_object ... ok
[INFO] [stdout] test test_value_is ... ok
[INFO] [stdout] test test_value_number_to_string ... ok
[INFO] [stdout] test test_write ... ok
[INFO] [stdout] test test_value ... ok
[INFO] [stdout] test test_number_as_string ... ok
[INFO] [stdout] test test_char ... ok
[INFO] [stdout] test test_number_to_string ... ok
[INFO] [stdout] test test_string ... ok
[INFO] [stdout] test test_to_json_string ... ok
[INFO] [stdout] test test_pipe ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests nop_json
[INFO] [stdout] 
[INFO] [stdout] running 40 tests
[INFO] [stdout] test src/lib.rs - (line 37) - compile ... ok
[INFO] [stdout] test src/debug_to_json.rs - debug_to_json::DebugToJson (line 37) ... ok
[INFO] [stdout] test src/debug_to_json.rs - debug_to_json::DebugToJson (line 16) ... ok
[INFO] [stdout] test src/lib.rs - (line 177) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::Reader<T>::new (line 1218) ... ok
[INFO] [stdout] test src/debug_to_json.rs - debug_to_json::DebugToJson (line 28) ... ok
[INFO] [stdout] test src/debug_to_json.rs - debug_to_json::DebugToJson::to_json_string (line 63) ... ok
[INFO] [stdout] test src/lib.rs - (line 95) ... ok
[INFO] [stdout] test src/lib.rs - (line 133) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::Reader<T>::new (line 1247) - compile ... ok
[INFO] [stdout] test src/lib.rs - (line 29) ... ok
[INFO] [stdout] test src/debug_to_json.rs - debug_to_json::DebugToJson::to_json_string (line 70) ... ok
[INFO] [stdout] test src/escape.rs - escape::escape (line 12) ... ok
[INFO] [stdout] test src/lib.rs - (line 145) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::Reader<T>::new (line 1230) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::Reader<T>::new (line 1238) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::Reader<T>::new (line 1224) ... ok
[INFO] [stdout] test src/lib.rs - (line 163) ... ok
[INFO] [stdout] test src/lib.rs - (line 75) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::Reader<T>::read_blob (line 2088) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::Reader<T>::read_array (line 2372) ... ok
[INFO] [stdout] test src/lib.rs - (line 108) ... ok
[INFO] [stdout] test src/lib.rs - (line 53) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::TryFromJson (line 543) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::TryFromJson (line 591) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::TryFromJson (line 721) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::TryFromJson (line 633) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::Reader<T>::read_blob (line 2078) ... ok
[INFO] [stdout] test src/value.rs - value::Value (line 20) ... ok
[INFO] [stdout] test src/write_to_json.rs - write_to_json::WriteToJson (line 16) ... ok
[INFO] [stdout] test src/validate_json.rs - validate_json::ValidateJson (line 13) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::TryFromJson (line 757) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::Reader<T>::read_object (line 2175) ... ok
[INFO] [stdout] test src/value.rs - value::Value (line 31) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::TryFromJson (line 661) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::TryFromJson (line 571) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::Reader<T>::read_object_use_buffer (line 2272) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::TryFromJson (line 688) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::TryFromJson (line 611) ... ok
[INFO] [stdout] test src/nop_json.rs - nop_json::TryFromJson (line 675) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 40 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.69s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ed376da304c1202fabbbc4cd005e575c6cf2e7e77af9dcde4b39bb114bb6adbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed376da304c1202fabbbc4cd005e575c6cf2e7e77af9dcde4b39bb114bb6adbf", kill_on_drop: false }`
[INFO] [stdout] ed376da304c1202fabbbc4cd005e575c6cf2e7e77af9dcde4b39bb114bb6adbf