[INFO] fetching crate assume 0.5.0...
[INFO] checking assume-0.5.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate assume 0.5.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate assume 0.5.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate assume 0.5.0
[INFO] finished tweaking crates.io crate assume 0.5.0
[INFO] tweaked toml for crates.io crate assume 0.5.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3aa67be0e5602696524bce35e2a1b4448db6085fddee770c778bcd681da4b08c
[INFO] running `Command { std: "docker" "start" "-a" "3aa67be0e5602696524bce35e2a1b4448db6085fddee770c778bcd681da4b08c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3aa67be0e5602696524bce35e2a1b4448db6085fddee770c778bcd681da4b08c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3aa67be0e5602696524bce35e2a1b4448db6085fddee770c778bcd681da4b08c", kill_on_drop: false }`
[INFO] [stdout] 3aa67be0e5602696524bce35e2a1b4448db6085fddee770c778bcd681da4b08c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 379a3067a45cb48675d83c4ddf78e57768398b586b69d7afe346b32ee6af9867
[INFO] running `Command { std: "docker" "start" "-a" "379a3067a45cb48675d83c4ddf78e57768398b586b69d7afe346b32ee6af9867", kill_on_drop: false }`
[INFO] [stderr]     Checking assume v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] running `Command { std: "docker" "inspect" "379a3067a45cb48675d83c4ddf78e57768398b586b69d7afe346b32ee6af9867", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "379a3067a45cb48675d83c4ddf78e57768398b586b69d7afe346b32ee6af9867", kill_on_drop: false }`
[INFO] [stdout] 379a3067a45cb48675d83c4ddf78e57768398b586b69d7afe346b32ee6af9867
[INFO] checking assume-0.5.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate assume 0.5.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate assume 0.5.0 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate assume 0.5.0
[INFO] finished tweaking crates.io crate assume 0.5.0
[INFO] tweaked toml for crates.io crate assume 0.5.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cbbf8bcfb5e921432993e8886945323a5b652e4c5490e128738e8df7328ae154
[INFO] running `Command { std: "docker" "start" "-a" "cbbf8bcfb5e921432993e8886945323a5b652e4c5490e128738e8df7328ae154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cbbf8bcfb5e921432993e8886945323a5b652e4c5490e128738e8df7328ae154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbbf8bcfb5e921432993e8886945323a5b652e4c5490e128738e8df7328ae154", kill_on_drop: false }`
[INFO] [stdout] cbbf8bcfb5e921432993e8886945323a5b652e4c5490e128738e8df7328ae154
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba6314951a179f810a234d3441ccf98128c0985cf8fcd8b00adb16035e7385d3
[INFO] running `Command { std: "docker" "start" "-a" "ba6314951a179f810a234d3441ccf98128c0985cf8fcd8b00adb16035e7385d3", kill_on_drop: false }`
[INFO] [stderr]     Checking assume v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> src/lib.rs:190:13
[INFO] [stdout]     |
[INFO] [stdout] 190 | /             unsafe {
[INFO] [stdout] 191 | |                 $crate::__private::unreachable_unchecked()
[INFO] [stdout] 192 | |             }
[INFO] [stdout]     | |_____________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 284 |           assume!(unsafe: @unreachable);
[INFO] [stdout]     |           ----------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `$crate::__assume_impl` which comes from the expansion of the macro `assume` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> src/lib.rs:190:13
[INFO] [stdout]     |
[INFO] [stdout] 190 | /             unsafe {
[INFO] [stdout] 191 | |                 $crate::__private::unreachable_unchecked()
[INFO] [stdout] 192 | |             }
[INFO] [stdout]     | |_____________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 291 |           assume!(unsafe: @unreachable, "oh no");
[INFO] [stdout]     |           -------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `$crate::__assume_impl` which comes from the expansion of the macro `assume` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> src/lib.rs:190:13
[INFO] [stdout]     |
[INFO] [stdout] 190 | /             unsafe {
[INFO] [stdout] 191 | |                 $crate::__private::unreachable_unchecked()
[INFO] [stdout] 192 | |             }
[INFO] [stdout]     | |_____________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 298 |           assume!(unsafe: @unreachable, "oh no, a {}", "problem");
[INFO] [stdout]     |           ------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `$crate::__assume_impl` which comes from the expansion of the macro `assume` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `assume` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "ba6314951a179f810a234d3441ccf98128c0985cf8fcd8b00adb16035e7385d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba6314951a179f810a234d3441ccf98128c0985cf8fcd8b00adb16035e7385d3", kill_on_drop: false }`
[INFO] [stdout] ba6314951a179f810a234d3441ccf98128c0985cf8fcd8b00adb16035e7385d3