[INFO] fetching crate stutter 0.1.0...
[INFO] testing stutter-0.1.0 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate stutter 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate stutter 0.1.0
[INFO] finished tweaking crates.io crate stutter 0.1.0
[INFO] tweaked toml for crates.io crate stutter 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate stutter 0.1.0 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "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" "+caccb4d0368bd918ef6668af8e13834d07040417" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63cd0f57f86ab60b9b6d3fd9f05dac6d0c207706bf9fda16682f88ccfd6a0be8
[INFO] running `Command { std: "docker" "start" "-a" "63cd0f57f86ab60b9b6d3fd9f05dac6d0c207706bf9fda16682f88ccfd6a0be8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63cd0f57f86ab60b9b6d3fd9f05dac6d0c207706bf9fda16682f88ccfd6a0be8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63cd0f57f86ab60b9b6d3fd9f05dac6d0c207706bf9fda16682f88ccfd6a0be8", kill_on_drop: false }`
[INFO] [stdout] 63cd0f57f86ab60b9b6d3fd9f05dac6d0c207706bf9fda16682f88ccfd6a0be8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dcc4696f88d2fa2b70cc585b96e0ac56a228d94f03c4cc1b7555ff802b28cbc0
[INFO] running `Command { std: "docker" "start" "-a" "dcc4696f88d2fa2b70cc585b96e0ac56a228d94f03c4cc1b7555ff802b28cbc0", kill_on_drop: false }`
[INFO] [stderr]    Compiling stutter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "dcc4696f88d2fa2b70cc585b96e0ac56a228d94f03c4cc1b7555ff802b28cbc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcc4696f88d2fa2b70cc585b96e0ac56a228d94f03c4cc1b7555ff802b28cbc0", kill_on_drop: false }`
[INFO] [stdout] dcc4696f88d2fa2b70cc585b96e0ac56a228d94f03c4cc1b7555ff802b28cbc0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 341d26c114bc27510c0fbd2f3e9800fa91a7259cfba6fe334eaf2e27564e394c
[INFO] running `Command { std: "docker" "start" "-a" "341d26c114bc27510c0fbd2f3e9800fa91a7259cfba6fe334eaf2e27564e394c", kill_on_drop: false }`
[INFO] [stderr]    Compiling stutter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> tests/expr.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     for i in 0..n {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `BoolLiteral`, `Variable`, `Add`, and `Sub` are never constructed
[INFO] [stdout]   --> tests/expr.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | enum Expr {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout]  8 |     IntLiteral(i64),
[INFO] [stdout]  9 |     BoolLiteral(bool),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 10 |     Variable(String),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 11 |     Add(Box<Expr>, Box<Expr>),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 12 |     Sub(Box<Expr>, Box<Expr>),
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set` is never used
[INFO] [stdout]   --> tests/expr.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Environment {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn set(&mut self, var: String, value: Value) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "341d26c114bc27510c0fbd2f3e9800fa91a7259cfba6fe334eaf2e27564e394c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "341d26c114bc27510c0fbd2f3e9800fa91a7259cfba6fe334eaf2e27564e394c", kill_on_drop: false }`
[INFO] [stdout] 341d26c114bc27510c0fbd2f3e9800fa91a7259cfba6fe334eaf2e27564e394c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9c95a951bcf545ae969841b96c5a6596395eb1d13a4f9d3c250139d6848f1b77
[INFO] running `Command { std: "docker" "start" "-a" "9c95a951bcf545ae969841b96c5a6596395eb1d13a4f9d3c250139d6848f1b77", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> tests/expr.rs:91:9
[INFO] [stderr]    |
[INFO] [stderr] 91 |     for i in 0..n {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variants `BoolLiteral`, `Variable`, `Add`, and `Sub` are never constructed
[INFO] [stderr]   --> tests/expr.rs:9:5
[INFO] [stderr]    |
[INFO] [stderr]  7 | enum Expr {
[INFO] [stderr]    |      ---- variants in this enum
[INFO] [stderr]  8 |     IntLiteral(i64),
[INFO] [stderr]  9 |     BoolLiteral(bool),
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 10 |     Variable(String),
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 11 |     Add(Box<Expr>, Box<Expr>),
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 12 |     Sub(Box<Expr>, Box<Expr>),
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `set` is never used
[INFO] [stderr]   --> tests/expr.rs:40:12
[INFO] [stderr]    |
[INFO] [stderr] 32 | impl Environment {
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 40 |     pub fn set(&mut self, var: String, value: Value) {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `stutter` (test "expr") generated 3 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/stutter-6dc3ca3101a805ec)
[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/expr.rs (/opt/rustwide/target/debug/deps/expr-eca0a6b33b987924)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_step_01 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stutter
[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] running `Command { std: "docker" "inspect" "9c95a951bcf545ae969841b96c5a6596395eb1d13a4f9d3c250139d6848f1b77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c95a951bcf545ae969841b96c5a6596395eb1d13a4f9d3c250139d6848f1b77", kill_on_drop: false }`
[INFO] [stdout] 9c95a951bcf545ae969841b96c5a6596395eb1d13a4f9d3c250139d6848f1b77