[INFO] cloning repository https://github.com/valekar/rust-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/valekar/rust-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvalekar%2Frust-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvalekar%2Frust-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2eeae0ed967ea63e698198235aa39cf767ba7851
[INFO] testing valekar/rust-book against master#ebf0cf75d368c035f4c7e7246d203bd469ee4a51 for pr-137940
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvalekar%2Frust-book" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/valekar/rust-book on toolchain ebf0cf75d368c035f4c7e7246d203bd469ee4a51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/valekar/rust-book
[INFO] finished tweaking git repo https://github.com/valekar/rust-book
[INFO] tweaked toml for git repo https://github.com/valekar/rust-book written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/valekar/rust-book 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" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a08403976d6557cd650fce6885580ae93d0f58ea568d40fc544f3c6bcb448024
[INFO] running `Command { std: "docker" "start" "-a" "a08403976d6557cd650fce6885580ae93d0f58ea568d40fc544f3c6bcb448024", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a08403976d6557cd650fce6885580ae93d0f58ea568d40fc544f3c6bcb448024", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a08403976d6557cd650fce6885580ae93d0f58ea568d40fc544f3c6bcb448024", kill_on_drop: false }`
[INFO] [stdout] a08403976d6557cd650fce6885580ae93d0f58ea568d40fc544f3c6bcb448024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e3df6b27b522e95bdd1bd37de70881f89c3adeec8d496624af8909223c0abb3
[INFO] running `Command { std: "docker" "start" "-a" "4e3df6b27b522e95bdd1bd37de70881f89c3adeec8d496624af8909223c0abb3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling chap-4 v0.1.0 (/opt/rustwide/workdir/chap-4)
[INFO] [stderr]    Compiling chap-3 v0.1.0 (/opt/rustwide/workdir/chap-3)
[INFO] [stderr]    Compiling chap-1 v0.1.0 (/opt/rustwide/workdir/chap-1)
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]   --> chap-4/src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let s3 = &mut s1;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s4`
[INFO] [stdout]   --> chap-4/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let s4 = &mut s1;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling chap-2 v0.1.0 (/opt/rustwide/workdir/chap-2)
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> chap-2/src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/tmp/rustcwlDm2g/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/{librand-18247366df8c24e7.rlib,librand_chacha-2c8dfefb4adf8e2e.rlib,libppv_lite86-88ed22677a4c0286.rlib,librand_core-a04ca4c39e6d27c2.rlib,libgetrandom-ce390af5e79a03d1.rlib,liblibc-e9d52d29bf569687.rlib,libcfg_if-33ef6c02a07f9fec.rlib}.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,libcfg_if-*,liblibc-*,liballoc-*,librustc_std_workspace_core-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lc" "-lm" "-lrt" "-lpthread" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/tmp/rustcwlDm2g/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,-znostart-stop-gc" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/chap_2-99e8a956ee9433a7" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
[INFO] [stdout]           Stack dump:
[INFO] [stdout]           0.    Program arguments: /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/bin/rust-lld -flavor gnu -plugin /usr/lib/gcc/x86_64-linux-gnu/11/liblto_plugin.so -plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper -plugin-opt=-fresolution=/tmp/cciYnjWK.res --build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed -dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -z now -z relro -o /opt/rustwide/target/debug/deps/chap_2-99e8a956ee9433a7 /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/Scrt1.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/11/crtbeginS.o -L/tmp/rustcwlDm2g/raw-dylibs -L/opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib -L/opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld -L/usr/lib/gcc/x86_64-linux-gnu/11 -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/11/../../../../lib -L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/11/../../.. /tmp/rustcwlDm2g/symbols.o /opt/rustwide/target/debug/deps/chap_2-99e8a956ee9433a7.chap_2.2659f7cb87e7cf95-cgu.0.rcgu.o /opt/rustwide/target/debug/deps/chap_2-99e8a956ee9433a7.78h9d45qjxakh3vmqv6z2iv4l.rcgu.o --as-needed -Bstatic /opt/rustwide/target/debug/deps/librand-18247366df8c24e7.rlib /opt/rustwide/target/debug/deps/librand_chacha-2c8dfefb4adf8e2e.rlib /opt/rustwide/target/debug/deps/libppv_lite86-88ed22677a4c0286.rlib /opt/rustwide/target/debug/deps/librand_core-a04ca4c39e6d27c2.rlib /opt/rustwide/target/debug/deps/libgetrandom-ce390af5e79a03d1.rlib /opt/rustwide/target/debug/deps/liblibc-e9d52d29bf569687.rlib /opt/rustwide/target/debug/deps/libcfg_if-33ef6c02a07f9fec.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-bef9ff2a661ad41c.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-853362b97afc2f85.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-e23f881d85955200.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-a49c48c72917b7fd.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-3ca1e42d18edf654.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-a781adec4bf6a44b.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-2968ce6079bb1f71.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-206136408988573f.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-054c4e8a42992d63.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-7b1b7572bf2bef56.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-b1741068faf841b8.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler2-f0b81b684679327b.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-a0b3d4c96ac57d57.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-c93a46af375896b2.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-c6beddec4685a323.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-96fab14884229a11.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-186a023b8864be69.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-74a8d2c13eeedc93.rlib /opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-b294c1429f78dd04.rlib -Bdynamic -lc -lm -lrt -lpthread -lgcc_s -lutil -lrt -lpthread -lm -ldl -lc -znostart-stop-gc --eh-frame-hdr -z noexecstack --gc-sections -z relro -z now /usr/lib/gcc/x86_64-linux-gnu/11/crtendS.o /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/crtn.o
[INFO] [stdout]            #0 0x000074ed118db4f7 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/libLLVM.so.20.1-rust-1.87.0-nightly+0x56db4f7)
[INFO] [stdout]            #1 0x000074ed118db90c SignalHandler(int) (/opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/libLLVM.so.20.1-rust-1.87.0-nightly+0x56db90c)
[INFO] [stdout]            #2 0x000074ed15e55520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
[INFO] [stdout]            #3 0x00005fb098768a9a void lld::elf::writeResult<llvm::object::ELFType<(llvm::endianness)1, true> >(lld::elf::Ctx&) (/opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/bin/rust-lld+0x557a9a)
[INFO] [stdout]            #4 0x00005fb098581f23 void lld::elf::LinkerDriver::link<llvm::object::ELFType<(llvm::endianness)1, true> >(llvm::opt::InputArgList&) Driver.cpp:0:0
[INFO] [stdout]            #5 0x00005fb09855fbfa lld::elf::LinkerDriver::linkerMain(llvm::ArrayRef<char const*>) Driver.cpp:0:0
[INFO] [stdout]            #6 0x00005fb09855b014 lld::elf::link(llvm::ArrayRef<char const*>, llvm::raw_ostream&, llvm::raw_ostream&, bool, bool) (/opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/bin/rust-lld+0x34a014)
[INFO] [stdout]            #7 0x00005fb098469fb6 lld::unsafeLldMain(llvm::ArrayRef<char const*>, llvm::raw_ostream&, llvm::raw_ostream&, llvm::ArrayRef<lld::DriverDef>, bool) (/opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/bin/rust-lld+0x258fb6)
[INFO] [stdout]            #8 0x00005fb098469000 lld_main(int, char**, llvm::ToolContext const&) (/opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/bin/rust-lld+0x258000)
[INFO] [stdout]            #9 0x00005fb0984696b1 main (/opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/bin/rust-lld+0x2586b1)
[INFO] [stdout]           #10 0x000074ed15e3cd90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
[INFO] [stdout]           #11 0x000074ed15e3ce40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
[INFO] [stdout]           #12 0x00005fb0982ebc69 _start (/opt/rustwide/rustup-home/toolchains/ebf0cf75d368c035f4c7e7246d203bd469ee4a51/lib/rustlib/x86_64-unknown-linux-gnu/bin/rust-lld+0xdac69)
[INFO] [stdout]           collect2: fatal error: ld terminated with signal 7 [Bus error], core dumped
[INFO] [stdout]           compilation terminated.
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chap-2` (bin "chap-2") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "4e3df6b27b522e95bdd1bd37de70881f89c3adeec8d496624af8909223c0abb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e3df6b27b522e95bdd1bd37de70881f89c3adeec8d496624af8909223c0abb3", kill_on_drop: false }`
[INFO] [stdout] 4e3df6b27b522e95bdd1bd37de70881f89c3adeec8d496624af8909223c0abb3