[INFO] fetching crate passerine 0.6.1...
[INFO] checking passerine-0.6.1 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate passerine 0.6.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate passerine 0.6.1 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate passerine 0.6.1
[INFO] finished tweaking crates.io crate passerine 0.6.1
[INFO] tweaked toml for crates.io crate passerine 0.6.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af017e7589c311f7bf48c830c498bcc908e653309bbf71d77e9cd28091126d15
[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" "af017e7589c311f7bf48c830c498bcc908e653309bbf71d77e9cd28091126d15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af017e7589c311f7bf48c830c498bcc908e653309bbf71d77e9cd28091126d15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af017e7589c311f7bf48c830c498bcc908e653309bbf71d77e9cd28091126d15", kill_on_drop: false }`
[INFO] [stdout] af017e7589c311f7bf48c830c498bcc908e653309bbf71d77e9cd28091126d15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c0967776892c99e25bcc59c350524e02392a924405bec9a6e660d55b724f41a
[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" "2c0967776892c99e25bcc59c350524e02392a924405bec9a6e660d55b724f41a", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking passerine v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Hash`, `Hasher`
[INFO] [stdout]  --> src/common/data.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::{Hash, Hasher};
[INFO] [stdout]   |                 ^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error`, `Formatter`
[INFO] [stdout]  --> src/common/data.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::{Debug, Error, Formatter};
[INFO] [stdout]   |                       ^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/common/data.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> src/common/data.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::common::data::Data`
[INFO] [stdout]  --> src/compiler/parse.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::common::data::Data;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::vm::local::Local`
[INFO] [stdout]  --> src/compiler/parse.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::vm::local::Local;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Hash`, `Hasher`
[INFO] [stdout]  --> src/common/data.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::{Hash, Hasher};
[INFO] [stdout]   |                 ^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error`, `Formatter`
[INFO] [stdout]  --> src/common/data.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::{Debug, Error, Formatter};
[INFO] [stdout]   |                       ^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/common/data.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> src/common/data.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::common::data::Data`
[INFO] [stdout]  --> src/compiler/parse.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::common::data::Data;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::vm::local::Local`
[INFO] [stdout]  --> src/compiler/parse.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::vm::local::Local;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end_col`
[INFO] [stdout]    --> src/common/span.rs:132:50
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let ((start_line, start_col), (end_line, end_col)) = match self.line_indicies() {
[INFO] [stdout]     |                                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_end_col`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end_col`
[INFO] [stdout]    --> src/common/span.rs:132:50
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let ((start_line, start_col), (end_line, end_col)) = match self.line_indicies() {
[INFO] [stdout]     |                                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_end_col`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]   --> src/vm/vm.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn next(&mut self)                           { self.ip += 1; }
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `terminate`
[INFO] [stdout]   --> src/vm/vm.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn terminate(&mut self) -> Result<(), Trace> { self.ip = self.chunk.code.len(); Ok(()) }
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `done`
[INFO] [stdout]   --> src/vm/vm.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn done(&mut self)      -> Result<(), Trace> { self.next(); Ok(()) }
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_byte`
[INFO] [stdout]   --> src/vm/vm.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn peek_byte(&mut self) -> u8                { self.chunk.code[self.ip] }
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_byte`
[INFO] [stdout]   --> src/vm/vm.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn next_byte(&mut self) -> u8                { self.done().unwrap(); self.peek_byte() }
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_number`
[INFO] [stdout]   --> src/vm/vm.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn next_number(&mut self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_local`
[INFO] [stdout]   --> src/vm/vm.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn find_local(&mut self, local: &Local) -> Option<usize> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `local_index`
[INFO] [stdout]   --> src/vm/vm.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn local_index(&mut self) -> (Local, Option<usize>) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `step`
[INFO] [stdout]   --> src/vm/vm.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn step(&mut self) -> Result<(), Trace> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]    --> src/vm/vm.rs:103:8
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn run(&mut self, chunk: Chunk) -> Result<(), Trace> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `con`
[INFO] [stdout]    --> src/vm/vm.rs:134:8
[INFO] [stdout]     |
[INFO] [stdout] 134 |     fn con(&mut self) -> Result<(), Trace> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `save`
[INFO] [stdout]    --> src/vm/vm.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn save(&mut self) -> Result<(), Trace> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `load`
[INFO] [stdout]    --> src/vm/vm.rs:168:8
[INFO] [stdout]     |
[INFO] [stdout] 168 |     fn load(&mut self) -> Result<(), Trace> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `clear`
[INFO] [stdout]    --> src/vm/vm.rs:185:8
[INFO] [stdout]     |
[INFO] [stdout] 185 |     fn clear(&mut self) -> Result<(), Trace> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `call`
[INFO] [stdout]    --> src/vm/vm.rs:198:8
[INFO] [stdout]     |
[INFO] [stdout] 198 |     fn call(&mut self) -> Result<(), Trace> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `return_val`
[INFO] [stdout]    --> src/vm/vm.rs:223:8
[INFO] [stdout]     |
[INFO] [stdout] 223 |     fn return_val(&mut self) -> Result<(), Trace> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Local`
[INFO] [stdout]   --> src/vm/stack.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Local { local: Local, data: Data },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Data`
[INFO] [stdout]   --> src/vm/stack.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Data(Tagged),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `error`
[INFO] [stdout]   --> src/vm/trace.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn error(kind: &str, message: &str, spans: Vec<Span>) -> Trace {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_byte`
[INFO] [stdout]   --> src/vm/vm.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn next_byte(&mut self) -> u8                { self.done().unwrap(); self.peek_byte() }
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `Command { std: "docker" "inspect" "2c0967776892c99e25bcc59c350524e02392a924405bec9a6e660d55b724f41a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c0967776892c99e25bcc59c350524e02392a924405bec9a6e660d55b724f41a", kill_on_drop: false }`
[INFO] [stdout] 2c0967776892c99e25bcc59c350524e02392a924405bec9a6e660d55b724f41a