[INFO] fetching crate istring 0.2.2...
[INFO] testing istring-0.2.2 against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] extracting crate istring 0.2.2 into /workspace/builds/worker-83/source
[INFO] validating manifest of crates.io crate istring 0.2.2 on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate istring 0.2.2
[INFO] finished tweaking crates.io crate istring 0.2.2
[INFO] tweaked toml for crates.io crate istring 0.2.2 written to /workspace/builds/worker-83/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--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-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c70fb0ae4dd39c696e4ef4ca71a02f9755c0bdb4d608efd59e1fabc44922aa0
[INFO] running `Command { std: "docker" "start" "-a" "3c70fb0ae4dd39c696e4ef4ca71a02f9755c0bdb4d608efd59e1fabc44922aa0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c70fb0ae4dd39c696e4ef4ca71a02f9755c0bdb4d608efd59e1fabc44922aa0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c70fb0ae4dd39c696e4ef4ca71a02f9755c0bdb4d608efd59e1fabc44922aa0", kill_on_drop: false }`
[INFO] [stdout] 3c70fb0ae4dd39c696e4ef4ca71a02f9755c0bdb4d608efd59e1fabc44922aa0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc2d6578bba9c8eee45b3686e03423261615dc193ac8513d8328761393d6c113
[INFO] running `Command { std: "docker" "start" "-a" "bc2d6578bba9c8eee45b3686e03423261615dc193ac8513d8328761393d6c113", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling istring v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:136:46
[INFO] [stdout]     |
[INFO] [stdout] 136 |     pub fn with_capacity_in(capacity: usize, mut alloc: A) -> IString<A> {
[INFO] [stdout]     |                                              ----^^^^^
[INFO] [stdout]     |                                              |
[INFO] [stdout]     |                                              help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` 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 0.33s
[INFO] running `Command { std: "docker" "inspect" "bc2d6578bba9c8eee45b3686e03423261615dc193ac8513d8328761393d6c113", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc2d6578bba9c8eee45b3686e03423261615dc193ac8513d8328761393d6c113", kill_on_drop: false }`
[INFO] [stdout] bc2d6578bba9c8eee45b3686e03423261615dc193ac8513d8328761393d6c113
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0387fa6252c08225f8382d9de508a1653256f7db46b6ab3339d140967e7a5e5
[INFO] running `Command { std: "docker" "start" "-a" "d0387fa6252c08225f8382d9de508a1653256f7db46b6ab3339d140967e7a5e5", kill_on_drop: false }`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:136:46
[INFO] [stdout]     |
[INFO] [stdout] 136 |     pub fn with_capacity_in(capacity: usize, mut alloc: A) -> IString<A> {
[INFO] [stdout]     |                                              ----^^^^^
[INFO] [stdout]     |                                              |
[INFO] [stdout]     |                                              help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling istring v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:136:46
[INFO] [stdout]     |
[INFO] [stdout] 136 |     pub fn with_capacity_in(capacity: usize, mut alloc: A) -> IString<A> {
[INFO] [stdout]     |                                              ----^^^^^
[INFO] [stdout]     |                                              |
[INFO] [stdout]     |                                              help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `Command { std: "docker" "inspect" "d0387fa6252c08225f8382d9de508a1653256f7db46b6ab3339d140967e7a5e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0387fa6252c08225f8382d9de508a1653256f7db46b6ab3339d140967e7a5e5", kill_on_drop: false }`
[INFO] [stdout] d0387fa6252c08225f8382d9de508a1653256f7db46b6ab3339d140967e7a5e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-83/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a78178175695e58af966161e007b3fe5f5043b58d80e3102dc74db105ea3f8c9
[INFO] running `Command { std: "docker" "start" "-a" "a78178175695e58af966161e007b3fe5f5043b58d80e3102dc74db105ea3f8c9", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:136:46
[INFO] [stderr]     |
[INFO] [stderr] 136 |     pub fn with_capacity_in(capacity: usize, mut alloc: A) -> IString<A> {
[INFO] [stderr]     |                                              ----^^^^^
[INFO] [stderr]     |                                              |
[INFO] [stderr]     |                                              help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `istring` (lib) generated 1 warning
[INFO] [stderr] warning: `istring` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/istring-c84daacbaebe7acd)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_layout ... 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]      Running tests/misc.rs (/opt/rustwide/target/debug/deps/misc-7a4dfc61f0faddf1)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_misc ... 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]      Running tests/thread.rs (/opt/rustwide/target/debug/deps/thread-30a09e8b90493d21)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_thread ... 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 istring
[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" "a78178175695e58af966161e007b3fe5f5043b58d80e3102dc74db105ea3f8c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a78178175695e58af966161e007b3fe5f5043b58d80e3102dc74db105ea3f8c9", kill_on_drop: false }`
[INFO] [stdout] a78178175695e58af966161e007b3fe5f5043b58d80e3102dc74db105ea3f8c9