[INFO] fetching crate crdt-list 0.4.1...
[INFO] checking crdt-list-0.4.1 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] extracting crate crdt-list 0.4.1 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate crdt-list 0.4.1
[INFO] finished tweaking crates.io crate crdt-list 0.4.1
[INFO] tweaked toml for crates.io crate crdt-list 0.4.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate crdt-list 0.4.1 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 48 packages to latest compatible versions
[INFO] [stderr]       Adding backtrace v0.3.71 (available: v0.3.75)
[INFO] [stderr]       Adding color-backtrace v0.5.1 (available: v0.7.0)
[INFO] [stderr]       Adding ctor v0.1.26 (available: v0.5.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arref v0.1.0
[INFO] [stderr]   Downloaded color-backtrace v0.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 914849635c83514c016ae2458daeefb44c65cdec5c41b8191fabbf74ae9cf4fd
[INFO] running `Command { std: "docker" "start" "-a" "914849635c83514c016ae2458daeefb44c65cdec5c41b8191fabbf74ae9cf4fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "914849635c83514c016ae2458daeefb44c65cdec5c41b8191fabbf74ae9cf4fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "914849635c83514c016ae2458daeefb44c65cdec5c41b8191fabbf74ae9cf4fd", kill_on_drop: false }`
[INFO] [stdout] 914849635c83514c016ae2458daeefb44c65cdec5c41b8191fabbf74ae9cf4fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 800f19038687a98e531fbad6dbcc8b3a472a3398f1a033d86a919a3c7d95381f
[INFO] running `Command { std: "docker" "start" "-a" "800f19038687a98e531fbad6dbcc8b3a472a3398f1a033d86a919a3c7d95381f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]     Checking memchr v2.7.5
[INFO] [stderr]     Checking miniz_oxide v0.7.4
[INFO] [stderr]     Checking cfg-if v1.0.3
[INFO] [stderr]    Compiling cc v1.2.34
[INFO] [stderr]     Checking rustc-demangle v0.1.26
[INFO] [stderr]     Checking arref v0.1.0
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking crdt-list v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Op` is never constructed
[INFO] [stdout]  --> src/dumb_common.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Op {
[INFO] [stdout]   |            ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OpId` is never constructed
[INFO] [stdout]   --> src/dumb_common.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct OpId {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OpSetImpl` is never constructed
[INFO] [stdout]   --> src/dumb_common.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct OpSetImpl {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Content` is never constructed
[INFO] [stdout]   --> src/dumb_common.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct Content(Vec<Op>);
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `real_len`, `real_index`, `iter_real`, and `iter_real_mut` are never used
[INFO] [stdout]   --> src/dumb_common.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl Content {
[INFO] [stdout]    | ------------ methods in this implementation
[INFO] [stdout] 59 |     pub fn real_len(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     pub fn real_index(&self, index: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |     pub fn iter_real(&self) -> impl Iterator<Item = &Op> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn iter_real_mut(&mut self) -> impl Iterator<Item = &mut Op> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Container` is never constructed
[INFO] [stdout]   --> src/dumb_common.rs:86:12
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub struct Container {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Iter` is never constructed
[INFO] [stdout]   --> src/dumb_common.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub struct Iter<'a> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cursor` is never constructed
[INFO] [stdout]    --> src/dumb_common.rs:104:12
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub struct Cursor<'a> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]    Compiling ctor v0.1.26
[INFO] [stderr]     Checking color-backtrace v0.5.1
[INFO] [stdout] warning: struct `Op` is never constructed
[INFO] [stdout]  --> src/dumb_common.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Op {
[INFO] [stdout]   |            ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OpId` is never constructed
[INFO] [stdout]   --> src/dumb_common.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct OpId {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OpSetImpl` is never constructed
[INFO] [stdout]   --> src/dumb_common.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct OpSetImpl {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Content` is never constructed
[INFO] [stdout]   --> src/dumb_common.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct Content(Vec<Op>);
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `real_len`, `real_index`, `iter_real`, and `iter_real_mut` are never used
[INFO] [stdout]   --> src/dumb_common.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl Content {
[INFO] [stdout]    | ------------ methods in this implementation
[INFO] [stdout] 59 |     pub fn real_len(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     pub fn real_index(&self, index: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |     pub fn iter_real(&self) -> impl Iterator<Item = &Op> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn iter_real_mut(&mut self) -> impl Iterator<Item = &mut Op> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Container` is never constructed
[INFO] [stdout]   --> src/dumb_common.rs:86:12
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub struct Container {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Iter` is never constructed
[INFO] [stdout]   --> src/dumb_common.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub struct Iter<'a> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cursor` is never constructed
[INFO] [stdout]    --> src/dumb_common.rs:104:12
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub struct Cursor<'a> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.47s
[INFO] running `Command { std: "docker" "inspect" "800f19038687a98e531fbad6dbcc8b3a472a3398f1a033d86a919a3c7d95381f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "800f19038687a98e531fbad6dbcc8b3a472a3398f1a033d86a919a3c7d95381f", kill_on_drop: false }`
[INFO] [stdout] 800f19038687a98e531fbad6dbcc8b3a472a3398f1a033d86a919a3c7d95381f