[INFO] fetching crate wasmer-compiler-singlepass 1.0.0-alpha5...
[INFO] checking wasmer-compiler-singlepass-1.0.0-alpha5 against master#7f5a42b073dc2bee2aa625052eb066ee07072048 for pr-78991
[INFO] extracting crate wasmer-compiler-singlepass 1.0.0-alpha5 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate wasmer-compiler-singlepass 1.0.0-alpha5 on toolchain 7f5a42b073dc2bee2aa625052eb066ee07072048
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wasmer-compiler-singlepass 1.0.0-alpha5
[INFO] finished tweaking crates.io crate wasmer-compiler-singlepass 1.0.0-alpha5
[INFO] tweaked toml for crates.io crate wasmer-compiler-singlepass 1.0.0-alpha5 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e781cddc3c0b046b2287706f0c02cc32d1bac59e12eb455f450b7e02b491666
[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" "5e781cddc3c0b046b2287706f0c02cc32d1bac59e12eb455f450b7e02b491666", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e781cddc3c0b046b2287706f0c02cc32d1bac59e12eb455f450b7e02b491666", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e781cddc3c0b046b2287706f0c02cc32d1bac59e12eb455f450b7e02b491666", kill_on_drop: false }`
[INFO] [stdout] 5e781cddc3c0b046b2287706f0c02cc32d1bac59e12eb455f450b7e02b491666
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c57b024ae1f4bdf4d81bb287c51ef13f654e1790fb03f3e1af01697d3dc5cfc
[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" "8c57b024ae1f4bdf4d81bb287c51ef13f654e1790fb03f3e1af01697d3dc5cfc", kill_on_drop: false }`
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking wasmer-compiler v1.0.0-alpha5
[INFO] [stderr]     Checking crossbeam-epoch v0.9.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling dynasm v1.0.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking dynasmrt v1.0.0
[INFO] [stderr]     Checking wasmer-compiler-singlepass v1.0.0-alpha5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]     --> src/codegen_x64.rs:5233:29
[INFO] [stdout]      |
[INFO] [stdout] 5226 |                 while let Some(fp) = self.fp_stack.last() {
[INFO] [stdout]      |                                      ------------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 5233 |                             self.canonicalize_nan(
[INFO] [stdout]      |                             ^^^^ mutable borrow occurs here
[INFO] [stdout] 5234 |                                 fp.canonicalization.unwrap().to_size(),
[INFO] [stdout]      |                                 ------------------- immutable borrow later used here
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]      = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]      = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]     --> src/codegen_x64.rs:5132:29
[INFO] [stdout]      |
[INFO] [stdout] 5125 |                 while let Some(fp) = self.fp_stack.last() {
[INFO] [stdout]      |                                      ------------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 5132 |                             self.canonicalize_nan(
[INFO] [stdout]      |                             ^^^^ mutable borrow occurs here
[INFO] [stdout] 5133 |                                 fp.canonicalization.unwrap().to_size(),
[INFO] [stdout]      |                                 ------------------- immutable borrow later used here
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]      = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]     --> src/codegen_x64.rs:5233:29
[INFO] [stdout]      |
[INFO] [stdout] 5226 |                 while let Some(fp) = self.fp_stack.last() {
[INFO] [stdout]      |                                      ------------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 5233 |                             self.canonicalize_nan(
[INFO] [stdout]      |                             ^^^^ mutable borrow occurs here
[INFO] [stdout] 5234 |                                 fp.canonicalization.unwrap().to_size(),
[INFO] [stdout]      |                                 ------------------- immutable borrow later used here
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]      = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]      = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]     --> src/codegen_x64.rs:5132:29
[INFO] [stdout]      |
[INFO] [stdout] 5125 |                 while let Some(fp) = self.fp_stack.last() {
[INFO] [stdout]      |                                      ------------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 5132 |                             self.canonicalize_nan(
[INFO] [stdout]      |                             ^^^^ mutable borrow occurs here
[INFO] [stdout] 5133 |                                 fp.canonicalization.unwrap().to_size(),
[INFO] [stdout]      |                                 ------------------- immutable borrow later used here
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]      = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.18s
[INFO] running `Command { std: "docker" "inspect" "8c57b024ae1f4bdf4d81bb287c51ef13f654e1790fb03f3e1af01697d3dc5cfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c57b024ae1f4bdf4d81bb287c51ef13f654e1790fb03f3e1af01697d3dc5cfc", kill_on_drop: false }`
[INFO] [stdout] 8c57b024ae1f4bdf4d81bb287c51ef13f654e1790fb03f3e1af01697d3dc5cfc