[INFO] fetching crate kex 0.2.6...
[INFO] checking kex-0.2.6 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate kex 0.2.6 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate kex 0.2.6
[INFO] finished tweaking crates.io crate kex 0.2.6
[INFO] tweaked toml for crates.io crate kex 0.2.6 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate kex 0.2.6 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate kex 0.2.6 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77e7a48d5f55b67968ad18702ccb46ac9fe6060917c80f74469466bac43133ea
[INFO] running `Command { std: "docker" "start" "-a" "77e7a48d5f55b67968ad18702ccb46ac9fe6060917c80f74469466bac43133ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77e7a48d5f55b67968ad18702ccb46ac9fe6060917c80f74469466bac43133ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77e7a48d5f55b67968ad18702ccb46ac9fe6060917c80f74469466bac43133ea", kill_on_drop: false }`
[INFO] [stdout] 77e7a48d5f55b67968ad18702ccb46ac9fe6060917c80f74469466bac43133ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4cfe154fb8e04a3ea64f7f974396e82873788a899a102f78ae398a05526a1891
[INFO] running `Command { std: "docker" "start" "-a" "4cfe154fb8e04a3ea64f7f974396e82873788a899a102f78ae398a05526a1891", kill_on_drop: false }`
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking ascii v1.1.0
[INFO] [stderr]     Checking kex v0.2.6 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/app/opts.rs:95:29
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let fmt_str = match matches.opt_get_default(ADDR_FORMAT_SHORT_NAME, "h8".to_string()) {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/app/opts.rs:148:29
[INFO] [stdout]     |
[INFO] [stdout] 148 |         let fmt_str = match matches.opt_get_default(BYTE_FORMAT_SHORT_NAME, "h".to_string()) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/app/opts.rs:188:29
[INFO] [stdout]     |
[INFO] [stdout] 188 |           let fmt_str = match matches.opt_get_default(
[INFO] [stdout]     |  _____________________________^
[INFO] [stdout] 189 | |             GROUPPING_SHORT_NAME,
[INFO] [stdout] 190 | |             format!("{DEF_GROUP_SIZE}/{DEF_NGROUPS}"),
[INFO] [stdout] 191 | |         ) {
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/app/opts.rs:95:29
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let fmt_str = match matches.opt_get_default(ADDR_FORMAT_SHORT_NAME, "h8".to_string()) {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/app/opts.rs:148:29
[INFO] [stdout]     |
[INFO] [stdout] 148 |         let fmt_str = match matches.opt_get_default(BYTE_FORMAT_SHORT_NAME, "h".to_string()) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/app/opts.rs:188:29
[INFO] [stdout]     |
[INFO] [stdout] 188 |           let fmt_str = match matches.opt_get_default(
[INFO] [stdout]     |  _____________________________^
[INFO] [stdout] 189 | |             GROUPPING_SHORT_NAME,
[INFO] [stdout] 190 | |             format!("{DEF_GROUP_SIZE}/{DEF_NGROUPS}"),
[INFO] [stdout] 191 | |         ) {
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kex` (bin "kex" test) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `kex` (bin "kex") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "4cfe154fb8e04a3ea64f7f974396e82873788a899a102f78ae398a05526a1891", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cfe154fb8e04a3ea64f7f974396e82873788a899a102f78ae398a05526a1891", kill_on_drop: false }`
[INFO] [stdout] 4cfe154fb8e04a3ea64f7f974396e82873788a899a102f78ae398a05526a1891