[INFO] fetching crate carbon-assembler 1.6.7...
[INFO] checking carbon-assembler-1.6.7 against try#38c2997544af84fe301d600d6896397738163002 for pr-154205-1
[INFO] extracting crate carbon-assembler 1.6.7 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate carbon-assembler 1.6.7
[INFO] finished tweaking crates.io crate carbon-assembler 1.6.7
[INFO] tweaked toml for crates.io crate carbon-assembler 1.6.7 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate carbon-assembler 1.6.7 on toolchain 38c2997544af84fe301d600d6896397738163002
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38c2997544af84fe301d600d6896397738163002" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate carbon-assembler 1.6.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38c2997544af84fe301d600d6896397738163002" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+38c2997544af84fe301d600d6896397738163002" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea08fc5aceb932c48da63edde2547705274d3652194a5ee17a67523044cd9394
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[INFO] running `Command { std: "docker" "rm" "-f" "ea08fc5aceb932c48da63edde2547705274d3652194a5ee17a67523044cd9394", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+38c2997544af84fe301d600d6896397738163002" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b43260fe7e3d98cafaab80610ae56822be3ced861d406b46289e6e63f54fd62
[INFO] running `Command { std: "docker" "start" "-a" "7b43260fe7e3d98cafaab80610ae56822be3ced861d406b46289e6e63f54fd62", kill_on_drop: false }`
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[INFO] [stderr]    Compiling unicode-ident v1.0.8
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[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/frontend/lexer.rs:70:21","p":2,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
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[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"/rustc/38c2997544af84fe301d600d6896397738163002/library/core/src/macros/mod.rs:880:23","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
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[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/main.rs:28:21","p":1,"ph":0,"wa":0,"pa":0,"a":0,"pos":0,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":0,"a_opt":0,"sz_no_dedup":0,"sz_old":0,"sz_opt":0}
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[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/main.rs:42:55","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/frontend/lexer.rs:15:29","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/frontend/lexer.rs:70:21","p":2,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/frontend/parser.rs:19:13","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/frontend/parser.rs:45:16","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/frontend/parser.rs:165:39","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"/rustc/38c2997544af84fe301d600d6896397738163002/library/core/src/panic.rs:94:23","p":1,"ph":0,"wa":0,"pa":0,"a":0,"pos":0,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":0,"a_opt":0,"sz_no_dedup":0,"sz_old":0,"sz_opt":0}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"/rustc/38c2997544af84fe301d600d6896397738163002/library/core/src/macros/mod.rs:880:23","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/frontend/parser.rs:225:13","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/main.rs:28:21","p":1,"ph":0,"wa":0,"pa":0,"a":0,"pos":0,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":0,"a_opt":0,"sz_no_dedup":0,"sz_old":0,"sz_opt":0}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/main.rs:33:33","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/main.rs:40:33","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"carbon_assembler","loc":"src/main.rs:42:55","p":1,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/backend/assembler.rs:99:33
[INFO] [stdout]    |
[INFO] [stdout] 99 | ...                   _ => unreachable!()
[INFO] [stdout]    |                       ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/backend/assembler.rs:99:33
[INFO] [stdout]    |
[INFO] [stdout] 92 | ...                   CarbonOperand::Cond(c) => word |= write_cond(c),
[INFO] [stdout]    |                       ---------------------- matches some of the same values
[INFO] [stdout] 93 | ...                   CarbonOperand::Reg(r) => word |= r,
[INFO] [stdout]    |                       --------------------- matches some of the same values
[INFO] [stdout] 94 | ...                   CarbonOperand::JmpAddr(a) => {
[INFO] [stdout]    |                       ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 98 | ...                   CarbonOperand::Label(_) => (),
[INFO] [stdout]    |                       ----------------------- matches some of the same values
[INFO] [stdout] 99 | ...                   _ => unreachable!()
[INFO] [stdout]    |                       ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/backend/assembler.rs:99:33
[INFO] [stdout]    |
[INFO] [stdout] 99 | ...                   _ => unreachable!()
[INFO] [stdout]    |                       ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/backend/assembler.rs:99:33
[INFO] [stdout]    |
[INFO] [stdout] 92 | ...                   CarbonOperand::Cond(c) => word |= write_cond(c),
[INFO] [stdout]    |                       ---------------------- matches some of the same values
[INFO] [stdout] 93 | ...                   CarbonOperand::Reg(r) => word |= r,
[INFO] [stdout]    |                       --------------------- matches some of the same values
[INFO] [stdout] 94 | ...                   CarbonOperand::JmpAddr(a) => {
[INFO] [stdout]    |                       ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 98 | ...                   CarbonOperand::Label(_) => (),
[INFO] [stdout]    |                       ----------------------- matches some of the same values
[INFO] [stdout] 99 | ...                   _ => unreachable!()
[INFO] [stdout]    |                       ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pos` is never used
[INFO] [stdout]   --> src/frontend/parser.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl TokenBuffer {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn pos(&self) -> usize {
[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 `pos` is never used
[INFO] [stdout]   --> src/frontend/parser.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl TokenBuffer {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn pos(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 50.31s
[INFO] running `Command { std: "docker" "inspect" "7b43260fe7e3d98cafaab80610ae56822be3ced861d406b46289e6e63f54fd62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b43260fe7e3d98cafaab80610ae56822be3ced861d406b46289e6e63f54fd62", kill_on_drop: false }`
[INFO] [stdout] 7b43260fe7e3d98cafaab80610ae56822be3ced861d406b46289e6e63f54fd62