[INFO] updating cached repository gf4t47/rust_os
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gf4t47/rust_os
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gf4t47/rust_os" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/gf4t47/rust_os"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/gf4t47/rust_os'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gf4t47/rust_os" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/gf4t47/rust_os"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/gf4t47/rust_os'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7bbafe15c5bb6ad747f8ed8ba6caff8f853b3483
[INFO] sha for GitHub repo gf4t47/rust_os: 7bbafe15c5bb6ad747f8ed8ba6caff8f853b3483
[INFO] validating manifest of gf4t47/rust_os on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gf4t47/rust_os on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gf4t47/rust_os
[INFO] finished frobbing gf4t47/rust_os
[INFO] frobbed toml for gf4t47/rust_os written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/gf4t47/rust_os/Cargo.toml
[INFO] started frobbing gf4t47/rust_os
[INFO] finished frobbing gf4t47/rust_os
[INFO] frobbed toml for gf4t47/rust_os written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/gf4t47/rust_os/Cargo.toml
[INFO] crate gf4t47/rust_os has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing gf4t47/rust_os against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/gf4t47/rust_os:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] 71fee322671319c4eb24e5f975f8a40a7d89c0ac0cb078d174c0e35cfe53ef28
[INFO] running `"docker" "start" "-a" "71fee322671319c4eb24e5f975f8a40a7d89c0ac0cb078d174c0e35cfe53ef28"`
[INFO] [stderr]    Compiling usize_conversions v0.2.0
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling ux v0.1.2
[INFO] [stderr]    Compiling cpuio v0.2.0
[INFO] [stderr]    Compiling volatile v0.2.5
[INFO] [stderr]    Compiling pic8259_simple v0.1.1
[INFO] [stderr]    Compiling x86_64 v0.2.14
[INFO] [stderr]    Compiling uart_16550 v0.1.0
[INFO] [stderr]    Compiling rust_os v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/rust_os-0822681374441e98.rust_os.6makdgfr-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/rust_os-0822681374441e98.rust_os.6makdgfr-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/rust_os-0822681374441e98.rust_os.6makdgfr-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/rust_os-0822681374441e98.rust_os.6makdgfr-cgu.3.rcgu.o" "-o" "/opt/crater/target/debug/deps/rust_os-0822681374441e98" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/librust_os-5bc55da9efc95970.rlib" "/opt/crater/target/debug/deps/liblazy_static-1ceae46d3d54a464.rlib" "/opt/crater/target/debug/deps/libpic8259_simple-88aaf2a058a1da89.rlib" "/opt/crater/target/debug/deps/libcpuio-5bde1a851a6fbdd3.rlib" "/opt/crater/target/debug/deps/libuart_16550-8bb01a712bbe4147.rlib" "/opt/crater/target/debug/deps/libx86_64-0e4abbc13bd53168.rlib" "/opt/crater/target/debug/deps/libux-80ee57f6e9477291.rlib" "/opt/crater/target/debug/deps/libusize_conversions-d8bd59a0349841cb.rlib" "/opt/crater/target/debug/deps/libbit_field-6c331ed94e0165fc.rlib" "/opt/crater/target/debug/deps/libbitflags-ef069935de2e041e.rlib" "/opt/crater/target/debug/deps/libvolatile-9cfaa79a0ef81653.rlib" "/opt/crater/target/debug/deps/libspin-dff17b74aa8cf263.rlib" "/opt/crater/target/debug/deps/libbootloader_precompiled-90791db33c8fe1fe.rlib" "/opt/crater/target/debug/deps/libos_bootinfo-c2d05c0bd24423c5.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-39348c626a7cd664.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-a98540404781e6a7.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-f0f63061644276a5.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/rust_os-0822681374441e98.rust_os.6makdgfr-cgu.1.rcgu.o: In function `_start':
[INFO] [stderr]           /opt/crater/workdir/src/main.rs:16: multiple definition of `_start'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x12): undefined reference to `__libc_csu_fini'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x19): undefined reference to `__libc_csu_init'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x20): undefined reference to `main'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x26): undefined reference to `__libc_start_main'
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rust_os`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/test_basic_boot-268b1f32c0068e9d.test_basic_boot.btwwrw3s-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/test_basic_boot-268b1f32c0068e9d.test_basic_boot.btwwrw3s-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/test_basic_boot-268b1f32c0068e9d.test_basic_boot.btwwrw3s-cgu.2.rcgu.o" "-o" "/opt/crater/target/debug/deps/test_basic_boot-268b1f32c0068e9d" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/librust_os-5bc55da9efc95970.rlib" "/opt/crater/target/debug/deps/liblazy_static-1ceae46d3d54a464.rlib" "/opt/crater/target/debug/deps/libpic8259_simple-88aaf2a058a1da89.rlib" "/opt/crater/target/debug/deps/libcpuio-5bde1a851a6fbdd3.rlib" "/opt/crater/target/debug/deps/libuart_16550-8bb01a712bbe4147.rlib" "/opt/crater/target/debug/deps/libx86_64-0e4abbc13bd53168.rlib" "/opt/crater/target/debug/deps/libux-80ee57f6e9477291.rlib" "/opt/crater/target/debug/deps/libusize_conversions-d8bd59a0349841cb.rlib" "/opt/crater/target/debug/deps/libbit_field-6c331ed94e0165fc.rlib" "/opt/crater/target/debug/deps/libbitflags-ef069935de2e041e.rlib" "/opt/crater/target/debug/deps/libvolatile-9cfaa79a0ef81653.rlib" "/opt/crater/target/debug/deps/libspin-dff17b74aa8cf263.rlib" "/opt/crater/target/debug/deps/libbootloader_precompiled-90791db33c8fe1fe.rlib" "/opt/crater/target/debug/deps/libos_bootinfo-c2d05c0bd24423c5.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-39348c626a7cd664.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-a98540404781e6a7.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-f0f63061644276a5.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/test_basic_boot-268b1f32c0068e9d.test_basic_boot.btwwrw3s-cgu.0.rcgu.o: In function `_start':
[INFO] [stderr]           /opt/crater/workdir/src/bin/test-basic-boot.rs:16: multiple definition of `_start'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x12): undefined reference to `__libc_csu_fini'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x19): undefined reference to `__libc_csu_init'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x20): undefined reference to `main'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x26): undefined reference to `__libc_start_main'
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rust_os`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/test_exception_breakpoint-6d9961ef80aac82f.test_exception_breakpoint.eizds2ab-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-6d9961ef80aac82f.test_exception_breakpoint.eizds2ab-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-6d9961ef80aac82f.test_exception_breakpoint.eizds2ab-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-6d9961ef80aac82f.test_exception_breakpoint.eizds2ab-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-6d9961ef80aac82f.test_exception_breakpoint.eizds2ab-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-6d9961ef80aac82f.test_exception_breakpoint.eizds2ab-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-6d9961ef80aac82f.test_exception_breakpoint.eizds2ab-cgu.6.rcgu.o" "-o" "/opt/crater/target/debug/deps/test_exception_breakpoint-6d9961ef80aac82f" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/librust_os-5bc55da9efc95970.rlib" "/opt/crater/target/debug/deps/liblazy_static-1ceae46d3d54a464.rlib" "/opt/crater/target/debug/deps/libpic8259_simple-88aaf2a058a1da89.rlib" "/opt/crater/target/debug/deps/libcpuio-5bde1a851a6fbdd3.rlib" "/opt/crater/target/debug/deps/libuart_16550-8bb01a712bbe4147.rlib" "/opt/crater/target/debug/deps/libx86_64-0e4abbc13bd53168.rlib" "/opt/crater/target/debug/deps/libux-80ee57f6e9477291.rlib" "/opt/crater/target/debug/deps/libusize_conversions-d8bd59a0349841cb.rlib" "/opt/crater/target/debug/deps/libbit_field-6c331ed94e0165fc.rlib" "/opt/crater/target/debug/deps/libbitflags-ef069935de2e041e.rlib" "/opt/crater/target/debug/deps/libvolatile-9cfaa79a0ef81653.rlib" "/opt/crater/target/debug/deps/libspin-dff17b74aa8cf263.rlib" "/opt/crater/target/debug/deps/libbootloader_precompiled-90791db33c8fe1fe.rlib" "/opt/crater/target/debug/deps/libos_bootinfo-c2d05c0bd24423c5.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-39348c626a7cd664.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-a98540404781e6a7.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-f0f63061644276a5.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/test_exception_breakpoint-6d9961ef80aac82f.test_exception_breakpoint.eizds2ab-cgu.1.rcgu.o: In function `_start':
[INFO] [stderr]           /opt/crater/workdir/src/bin/test-exception-breakpoint.rs:20: multiple definition of `_start'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x12): undefined reference to `__libc_csu_fini'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x19): undefined reference to `__libc_csu_init'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x20): undefined reference to `main'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x26): undefined reference to `__libc_start_main'
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rust_os`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/test_panic-385d4750af6c6021.test_panic.8nha56t9-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/test_panic-385d4750af6c6021.test_panic.8nha56t9-cgu.1.rcgu.o" "-o" "/opt/crater/target/debug/deps/test_panic-385d4750af6c6021" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/librust_os-5bc55da9efc95970.rlib" "/opt/crater/target/debug/deps/liblazy_static-1ceae46d3d54a464.rlib" "/opt/crater/target/debug/deps/libpic8259_simple-88aaf2a058a1da89.rlib" "/opt/crater/target/debug/deps/libcpuio-5bde1a851a6fbdd3.rlib" "/opt/crater/target/debug/deps/libuart_16550-8bb01a712bbe4147.rlib" "/opt/crater/target/debug/deps/libx86_64-0e4abbc13bd53168.rlib" "/opt/crater/target/debug/deps/libux-80ee57f6e9477291.rlib" "/opt/crater/target/debug/deps/libusize_conversions-d8bd59a0349841cb.rlib" "/opt/crater/target/debug/deps/libbit_field-6c331ed94e0165fc.rlib" "/opt/crater/target/debug/deps/libbitflags-ef069935de2e041e.rlib" "/opt/crater/target/debug/deps/libvolatile-9cfaa79a0ef81653.rlib" "/opt/crater/target/debug/deps/libspin-dff17b74aa8cf263.rlib" "/opt/crater/target/debug/deps/libbootloader_precompiled-90791db33c8fe1fe.rlib" "/opt/crater/target/debug/deps/libos_bootinfo-c2d05c0bd24423c5.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-39348c626a7cd664.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-a98540404781e6a7.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-f0f63061644276a5.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/test_panic-385d4750af6c6021.test_panic.8nha56t9-cgu.0.rcgu.o: In function `_start':
[INFO] [stderr]           /opt/crater/workdir/src/bin/test-panic.rs:13: multiple definition of `_start'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x12): undefined reference to `__libc_csu_fini'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x19): undefined reference to `__libc_csu_init'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x20): undefined reference to `main'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x26): undefined reference to `__libc_start_main'
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rust_os`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-2577f468114626db.test_exception_double_fault_stack_overflow.za1nq8hb-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-2577f468114626db.test_exception_double_fault_stack_overflow.za1nq8hb-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-2577f468114626db.test_exception_double_fault_stack_overflow.za1nq8hb-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-2577f468114626db.test_exception_double_fault_stack_overflow.za1nq8hb-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-2577f468114626db.test_exception_double_fault_stack_overflow.za1nq8hb-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-2577f468114626db.test_exception_double_fault_stack_overflow.za1nq8hb-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-2577f468114626db.test_exception_double_fault_stack_overflow.za1nq8hb-cgu.6.rcgu.o" "-o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-2577f468114626db" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/librust_os-5bc55da9efc95970.rlib" "/opt/crater/target/debug/deps/liblazy_static-1ceae46d3d54a464.rlib" "/opt/crater/target/debug/deps/libpic8259_simple-88aaf2a058a1da89.rlib" "/opt/crater/target/debug/deps/libcpuio-5bde1a851a6fbdd3.rlib" "/opt/crater/target/debug/deps/libuart_16550-8bb01a712bbe4147.rlib" "/opt/crater/target/debug/deps/libx86_64-0e4abbc13bd53168.rlib" "/opt/crater/target/debug/deps/libux-80ee57f6e9477291.rlib" "/opt/crater/target/debug/deps/libusize_conversions-d8bd59a0349841cb.rlib" "/opt/crater/target/debug/deps/libbit_field-6c331ed94e0165fc.rlib" "/opt/crater/target/debug/deps/libbitflags-ef069935de2e041e.rlib" "/opt/crater/target/debug/deps/libvolatile-9cfaa79a0ef81653.rlib" "/opt/crater/target/debug/deps/libspin-dff17b74aa8cf263.rlib" "/opt/crater/target/debug/deps/libbootloader_precompiled-90791db33c8fe1fe.rlib" "/opt/crater/target/debug/deps/libos_bootinfo-c2d05c0bd24423c5.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-39348c626a7cd664.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-a98540404781e6a7.rlib" "/opt/crater/rustup-home/toolchains/7fea0229842e79db1159ea58ad9a653b288efee9-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-f0f63061644276a5.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-2577f468114626db.test_exception_double_fault_stack_overflow.za1nq8hb-cgu.0.rcgu.o: In function `_start':
[INFO] [stderr]           /opt/crater/workdir/src/bin/test-exception-double-fault-stack-overflow.rs:18: multiple definition of `_start'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o:(.text+0x0): first defined here
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x12): undefined reference to `__libc_csu_fini'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x19): undefined reference to `__libc_csu_init'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x20): undefined reference to `main'
[INFO] [stderr]           /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':
[INFO] [stderr]           (.text+0x26): undefined reference to `__libc_start_main'
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rust_os`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "71fee322671319c4eb24e5f975f8a40a7d89c0ac0cb078d174c0e35cfe53ef28"`
[INFO] running `"docker" "rm" "-f" "71fee322671319c4eb24e5f975f8a40a7d89c0ac0cb078d174c0e35cfe53ef28"`
[INFO] [stdout] 71fee322671319c4eb24e5f975f8a40a7d89c0ac0cb078d174c0e35cfe53ef28