[INFO] cloning repository https://github.com/peakchen90/rust-ffi-demo [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/peakchen90/rust-ffi-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeakchen90%2Frust-ffi-demo", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeakchen90%2Frust-ffi-demo'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5ad35c0bf2c24db97e49c5a7f0373243a0ab1ba4 [INFO] building peakchen90/rust-ffi-demo against master#a29f341a8ac4e9325a5e37027b4215f50a76d06f for pr-101929 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeakchen90%2Frust-ffi-demo" "/workspace/builds/worker-6/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/peakchen90/rust-ffi-demo on toolchain a29f341a8ac4e9325a5e37027b4215f50a76d06f [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a29f341a8ac4e9325a5e37027b4215f50a76d06f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] removed /workspace/builds/worker-6/source/.cargo/config [INFO] started tweaking git repo https://github.com/peakchen90/rust-ffi-demo [INFO] finished tweaking git repo https://github.com/peakchen90/rust-ffi-demo [INFO] tweaked toml for git repo https://github.com/peakchen90/rust-ffi-demo written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/peakchen90/rust-ffi-demo already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a29f341a8ac4e9325a5e37027b4215f50a76d06f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded dunce v0.1.1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:e92e462e59ac3446a933540fd361ddeb5362c86f92d432d6a560a917a465022e" "/opt/rustwide/cargo-home/bin/cargo" "+a29f341a8ac4e9325a5e37027b4215f50a76d06f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 49884b02445477f3c7136b7d34975d25ae8c933d426bdf5c9516b340ee6adb52 [INFO] running `Command { std: "docker" "start" "-a" "49884b02445477f3c7136b7d34975d25ae8c933d426bdf5c9516b340ee6adb52", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "49884b02445477f3c7136b7d34975d25ae8c933d426bdf5c9516b340ee6adb52", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "49884b02445477f3c7136b7d34975d25ae8c933d426bdf5c9516b340ee6adb52", kill_on_drop: false }` [INFO] [stdout] 49884b02445477f3c7136b7d34975d25ae8c933d426bdf5c9516b340ee6adb52 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:e92e462e59ac3446a933540fd361ddeb5362c86f92d432d6a560a917a465022e" "/opt/rustwide/cargo-home/bin/cargo" "+a29f341a8ac4e9325a5e37027b4215f50a76d06f" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 17efbd08663a9c0d178366a272d396348470bf16bd2a23585c4e334f257aaffa [INFO] running `Command { std: "docker" "start" "-a" "17efbd08663a9c0d178366a272d396348470bf16bd2a23585c4e334f257aaffa", kill_on_drop: false }` [INFO] [stderr] Compiling dunce v0.1.1 [INFO] [stderr] Compiling libc v0.2.106 [INFO] [stderr] Compiling cc v1.0.71 [INFO] [stderr] Compiling rust-ffi-demo v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `CStr` [INFO] [stdout] --> src/main.rs:3:16 [INFO] [stdout] | [INFO] [stdout] 3 | use std::ffi::{CStr, CString}; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: getting the inner pointer of a temporary `CString` [INFO] [stdout] --> src/main.rs:23:47 [INFO] [stdout] | [INFO] [stdout] 23 | CString::new("abc.json").unwrap().as_ptr(), [INFO] [stdout] | --------------------------------- ^^^^^^ this pointer will be invalid [INFO] [stdout] | | [INFO] [stdout] | this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(temporary_cstring_as_ptr)]` on by default [INFO] [stdout] = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned [INFO] [stdout] = help: for more information, see https://doc.rust-lang.org/reference/destructors.html [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: linking with `cc` failed: exit status: 1 [INFO] [stdout] | [INFO] [stdout] = note: "cc" "-m64" "/tmp/rustc6RATvz/symbols.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.rust_ffi_demo.de41f9c8-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077.1h2brb5epuzjiy06.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/workdir/lib" "-L" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-ljson" "-Wl,-Bdynamic" "-lc++" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/liblibc-e25dc6607bf088db.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-3dd5f78c3b43746e.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e13cbb326bcd01a4.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-13ac6af5403a52c8.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-a7b8febdd2acb289.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-343513f0726f71ed.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-8f833d900bfb98aa.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-e97a7960ca6216c8.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-fb8c561e8c8eb24d.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-a45121889bb564ec.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-f943c2d34bd4b56d.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-72ce2aaa649404e0.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-ac5d08ad5339e92e.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-dacfda262d5656fb.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-e2056a834ba0712c.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-a60649c148c6e2db.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-3e961d059b9bcde7.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-20f26f875d0170e2.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-522518611024dce5.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-05898138a596088a.rlib" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-5b83a1df856cf582.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/a29f341a8ac4e9325a5e37027b4215f50a76d06f/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/rust_ffi_demo-619ea7715409f077" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs" [INFO] [stdout] = note: /usr/bin/ld: cannot find -lc++ [INFO] [stdout] collect2: error: ld returned 1 exit status [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error; 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rust-ffi-demo` due to 2 previous errors; 2 warnings emitted [INFO] running `Command { std: "docker" "inspect" "17efbd08663a9c0d178366a272d396348470bf16bd2a23585c4e334f257aaffa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "17efbd08663a9c0d178366a272d396348470bf16bd2a23585c4e334f257aaffa", kill_on_drop: false }` [INFO] [stdout] 17efbd08663a9c0d178366a272d396348470bf16bd2a23585c4e334f257aaffa