[INFO] fetching crate xwasm-utils 0.6.2...
[INFO] testing xwasm-utils-0.6.2 against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] extracting crate xwasm-utils 0.6.2 into /workspace/builds/worker-109/source
[INFO] validating manifest of crates.io crate xwasm-utils 0.6.2 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 xwasm-utils 0.6.2
[INFO] finished tweaking crates.io crate xwasm-utils 0.6.2
[INFO] tweaked toml for crates.io crate xwasm-utils 0.6.2 written to /workspace/builds/worker-109/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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] f609e7e64b0f17488e0647c7f47de08b9f7e39234170dde0c2de2f02212c933f
[INFO] running `Command { std: "docker" "start" "-a" "f609e7e64b0f17488e0647c7f47de08b9f7e39234170dde0c2de2f02212c933f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f609e7e64b0f17488e0647c7f47de08b9f7e39234170dde0c2de2f02212c933f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f609e7e64b0f17488e0647c7f47de08b9f7e39234170dde0c2de2f02212c933f", kill_on_drop: false }`
[INFO] [stdout] f609e7e64b0f17488e0647c7f47de08b9f7e39234170dde0c2de2f02212c933f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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] 664d59f12d8098e7d601a8f9b655d6917c3397ca4e92181ac05d3e6086a8f70b
[INFO] running `Command { std: "docker" "start" "-a" "664d59f12d8098e7d601a8f9b655d6917c3397ca4e92181ac05d3e6086a8f70b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling xwasm v0.31.3
[INFO] [stderr]    Compiling xwasm-utils v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ref_list.rs:199:7
[INFO] [stdout]     |
[INFO] [stdout] 199 |         for mut entry in self.items.iter_mut() {
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/ref_list.rs:212:8
[INFO] [stdout]     |
[INFO] [stdout] 212 |             let mut detached = self.items.remove(*idx - total_removed);
[INFO] [stdout]     |                 ----^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stack_height/mod.rs:236:9
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 let mut opcodes = func_body.code_mut();
[INFO] [stdout]     |                     ----^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/optimizer.rs:32:2
[INFO] [stdout]    |
[INFO] [stdout] 32 |     mem::replace(module, module_temp);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/optimizer.rs:283:8
[INFO] [stdout]     |
[INFO] [stdout] 283 | ...                   mem::replace(func_name.names_mut(), updated_map);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/optimizer.rs:295:8
[INFO] [stdout]     |
[INFO] [stdout] 295 | ...                   mem::replace(local_name.local_names_mut(), updated_map);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.68s
[INFO] running `Command { std: "docker" "inspect" "664d59f12d8098e7d601a8f9b655d6917c3397ca4e92181ac05d3e6086a8f70b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "664d59f12d8098e7d601a8f9b655d6917c3397ca4e92181ac05d3e6086a8f70b", kill_on_drop: false }`
[INFO] [stdout] 664d59f12d8098e7d601a8f9b655d6917c3397ca4e92181ac05d3e6086a8f70b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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] d799c071d2b4548cffebe862596867ab92e79a08b009109edb2dc2da35cbefa3
[INFO] running `Command { std: "docker" "start" "-a" "d799c071d2b4548cffebe862596867ab92e79a08b009109edb2dc2da35cbefa3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling unindent v0.1.7
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ref_list.rs:199:7
[INFO] [stdout]     |
[INFO] [stdout] 199 |         for mut entry in self.items.iter_mut() {
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/ref_list.rs:212:8
[INFO] [stdout]     |
[INFO] [stdout] 212 |             let mut detached = self.items.remove(*idx - total_removed);
[INFO] [stdout]     |                 ----^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/stack_height/mod.rs:236:9
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 let mut opcodes = func_body.code_mut();
[INFO] [stdout]     |                     ----^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/optimizer.rs:32:2
[INFO] [stdout]    |
[INFO] [stdout] 32 |     mem::replace(module, module_temp);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/optimizer.rs:283:8
[INFO] [stdout]     |
[INFO] [stdout] 283 | ...                   mem::replace(func_name.names_mut(), updated_map);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/optimizer.rs:295:8
[INFO] [stdout]     |
[INFO] [stdout] 295 | ...                   mem::replace(local_name.local_names_mut(), updated_map);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cmake v0.1.46
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling wabt-sys v0.1.4
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]    Compiling indoc-impl v0.3.6
[INFO] [stderr]    Compiling indoc v0.3.6
[INFO] [stderr] error: could not compile `serde_derive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde_derive /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_derive-1.0.130/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' -C metadata=b23f09836f877a67 -C extra-filename=-b23f09836f877a67 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-9dbaaf035d6d15d1.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-0bcba2a61b67309f.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-3b220f1659e9fbe9.rlib --extern proc_macro --cap-lints allow --cap-lints=forbid --cfg underscore_consts --cfg ptr_addr_of` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d799c071d2b4548cffebe862596867ab92e79a08b009109edb2dc2da35cbefa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d799c071d2b4548cffebe862596867ab92e79a08b009109edb2dc2da35cbefa3", kill_on_drop: false }`
[INFO] [stdout] d799c071d2b4548cffebe862596867ab92e79a08b009109edb2dc2da35cbefa3