[INFO] updating cached repository https://github.com/ckaran/pyo3_issue_report_341 [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] d8116c36f759932a933e5ffc44b710a7415155d6 [INFO] checking ckaran/pyo3_issue_report_341 against try#e60d9e09c55855f5a848fde8ad83e13131a5b241 for pr-68350 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fckaran%2Fpyo3_issue_report_341" "/workspace/builds/worker-2/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/ckaran/pyo3_issue_report_341 on toolchain e60d9e09c55855f5a848fde8ad83e13131a5b241 [INFO] running `"/workspace/cargo-home/bin/cargo" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/ckaran/pyo3_issue_report_341 [INFO] finished tweaking git repo https://github.com/ckaran/pyo3_issue_report_341 [INFO] tweaked toml for git repo https://github.com/ckaran/pyo3_issue_report_341 written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate git repo https://github.com/ckaran/pyo3_issue_report_341 already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Updating crates.io index [INFO] [stderr] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this [INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag. [INFO] the lockfile is outdated, regenerating it [INFO] running `"/workspace/cargo-home/bin/cargo" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/workspace/cargo-home/bin/cargo" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e60d9e09c55855f5a848fde8ad83e13131a5b241" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 6da8a93a2e303be86abefb9a1fa89a6a989318bb6fc1648be4948882dd0ab56a [INFO] running `"docker" "start" "-a" "6da8a93a2e303be86abefb9a1fa89a6a989318bb6fc1648be4948882dd0ab56a"` [INFO] [stderr] Compiling proc-macro-hack-impl v0.4.2 [INFO] [stderr] Compiling regex-syntax v0.6.13 [INFO] [stderr] Compiling byteorder v1.3.2 [INFO] [stderr] Checking spin v0.4.10 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling thread_local v1.0.1 [INFO] [stderr] Compiling memchr v2.3.0 [INFO] [stderr] Compiling pyo3-derive-backend v0.6.0-alpha.1 [INFO] [stderr] Compiling proptest-derive v0.1.2 [INFO] [stderr] Compiling aho-corasick v0.7.6 [INFO] [stderr] Checking rusty-fork v0.2.2 [INFO] [stderr] error: Fallback to `!` may introduce undefined behavior [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-derive-0.1.2/src/derive.rs:378:9 [INFO] [stderr] | [INFO] [stderr] 378 | error::uninhabited_enum_variants_uninhabited(ctx)?; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] note: the type parameter T here was inferred to `!` [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-derive-0.1.2/src/derive.rs:378:9 [INFO] [stderr] | [INFO] [stderr] 378 | error::uninhabited_enum_variants_uninhabited(ctx)?; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] note: (type parameter defined here) [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-derive-0.1.2/src/error.rs:224:23 [INFO] [stderr] | [INFO] [stderr] 224 | pub fn $error(ctx: Ctx) -> DeriveResult { [INFO] [stderr] | ^ [INFO] [stderr] ... [INFO] [stderr] 294 | / fatal!( [INFO] [stderr] 295 | | uninhabited_enum_variants_uninhabited, [INFO] [stderr] 296 | | E0005, [INFO] [stderr] 297 | | "The enum you are deriving `Arbitrary` for is uninhabited since all its \ [INFO] [stderr] 298 | | variants are uninhabited. \ [INFO] [stderr] 299 | | An uninhabited type is by definition impossible to generate." [INFO] [stderr] 300 | | ); [INFO] [stderr] | |__- in this macro invocation [INFO] [stderr] note: ... due to this expression evaluating to `!` [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-derive-0.1.2/src/derive.rs:378:58 [INFO] [stderr] | [INFO] [stderr] 378 | error::uninhabited_enum_variants_uninhabited(ctx)?; [INFO] [stderr] | ^ [INFO] [stderr] = note: If you want the `!` type to be used here, add explicit type annotations [INFO] [stderr] [INFO] [stderr] error: Fallback to `!` may introduce undefined behavior [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-derive-0.1.2/src/derive.rs:373:9 [INFO] [stderr] | [INFO] [stderr] 373 | error::uninhabited_enum_with_no_variants(ctx)?; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] note: the type parameter T here was inferred to `!` [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-derive-0.1.2/src/derive.rs:373:9 [INFO] [stderr] | [INFO] [stderr] 373 | error::uninhabited_enum_with_no_variants(ctx)?; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] note: (type parameter defined here) [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-derive-0.1.2/src/error.rs:224:23 [INFO] [stderr] | [INFO] [stderr] 224 | pub fn $error(ctx: Ctx) -> DeriveResult { [INFO] [stderr] | ^ [INFO] [stderr] ... [INFO] [stderr] 282 | / fatal!( [INFO] [stderr] 283 | | uninhabited_enum_with_no_variants, [INFO] [stderr] 284 | | E0004, [INFO] [stderr] 285 | | "The enum you are deriving `Arbitrary` for is uninhabited since it has no \ [INFO] [stderr] 286 | | variants. An example of such an `enum` is: `enum Void {}`. \ [INFO] [stderr] 287 | | An uninhabited type is by definition impossible to generate." [INFO] [stderr] 288 | | ); [INFO] [stderr] | |__- in this macro invocation [INFO] [stderr] note: ... due to this expression evaluating to `!` [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-derive-0.1.2/src/derive.rs:373:54 [INFO] [stderr] | [INFO] [stderr] 373 | error::uninhabited_enum_with_no_variants(ctx)?; [INFO] [stderr] | ^ [INFO] [stderr] = note: If you want the `!` type to be used here, add explicit type annotations [INFO] [stderr] [INFO] [stderr] Compiling proc-macro-hack v0.4.2 [INFO] [stderr] error: aborting due to 2 previous errors [INFO] [stderr] [INFO] [stderr] error: could not compile `proptest-derive`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "6da8a93a2e303be86abefb9a1fa89a6a989318bb6fc1648be4948882dd0ab56a"` [INFO] running `"docker" "rm" "-f" "6da8a93a2e303be86abefb9a1fa89a6a989318bb6fc1648be4948882dd0ab56a"` [INFO] [stdout] 6da8a93a2e303be86abefb9a1fa89a6a989318bb6fc1648be4948882dd0ab56a