[INFO] cloning repository chyyuu/testos
[INFO] running `"git" "clone" "--bare" "git://github.com/chyyuu/testos.git" "work/cache/sources/gh/chyyuu/testos"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/chyyuu/testos'...
[INFO] running `"git" "clone" "work/cache/sources/gh/chyyuu/testos" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/chyyuu/testos"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/chyyuu/testos'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chyyuu/testos" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/chyyuu/testos"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/chyyuu/testos'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f62fd796c3aee5e023be655533c766643ee84322
[INFO] sha for GitHub repo chyyuu/testos: f62fd796c3aee5e023be655533c766643ee84322
[INFO] validating manifest of chyyuu/testos on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of chyyuu/testos on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing chyyuu/testos
[INFO] finished frobbing chyyuu/testos
[INFO] frobbed toml for chyyuu/testos written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/chyyuu/testos/Cargo.toml
[INFO] started frobbing chyyuu/testos
[INFO] finished frobbing chyyuu/testos
[INFO] frobbed toml for chyyuu/testos written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/chyyuu/testos/Cargo.toml
[INFO] crate chyyuu/testos already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/chyyuu/testos/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing chyyuu/testos against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-0/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/chyyuu/testos:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] 7b92a86f19501640e6cc3bded77d94125ea4c562a972a357d4c1915c5853518c
[INFO] running `"docker" "start" "-a" "7b92a86f19501640e6cc3bded77d94125ea4c562a972a357d4c1915c5853518c"`
[INFO] [stderr]    Compiling os_bootinfo v0.2.1
[INFO] [stderr]    Compiling usize_conversions v0.2.0
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling ux v0.1.3
[INFO] [stderr]    Compiling spin v0.5.0
[INFO] [stderr]    Compiling volatile v0.2.6
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling bootloader_precompiled v0.2.0
[INFO] [stderr]    Compiling x86_64 v0.2.14
[INFO] [stderr]    Compiling uart_16550 v0.1.0
[INFO] [stderr]    Compiling testos v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/vga_buffer.rs:112:21
[INFO] [stderr]     |
[INFO] [stderr] 112 |                 0x20...0x7e | b'\n' => self.write_byte(byte),
[INFO] [stderr]     |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(ellipsis_inclusive_range_patterns)] on by default
[INFO] [stderr] 
[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/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/test_basic_boot-152a0bb4a24f834b.test_basic_boot.cadj9dwg-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/test_basic_boot-152a0bb4a24f834b.test_basic_boot.cadj9dwg-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/test_basic_boot-152a0bb4a24f834b.test_basic_boot.cadj9dwg-cgu.2.rcgu.o" "-o" "/opt/crater/target/debug/deps/test_basic_boot-152a0bb4a24f834b" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libtestos-f2423f7139dc81f0.rlib" "/opt/crater/target/debug/deps/libuart_16550-b2a4a5e3ae961318.rlib" "/opt/crater/target/debug/deps/libx86_64-94fa78cb40e66d90.rlib" "/opt/crater/target/debug/deps/libux-efadc792039eb950.rlib" "/opt/crater/target/debug/deps/libusize_conversions-885df14c24659b2d.rlib" "/opt/crater/target/debug/deps/libbit_field-cd3bb28dc7f4af9e.rlib" "/opt/crater/target/debug/deps/libbitflags-4b832a9310b9b1d2.rlib" "/opt/crater/target/debug/deps/liblazy_static-de701c98ee84ab34.rlib" "/opt/crater/target/debug/deps/libspin-efe68d38fb3a8c35.rlib" "/opt/crater/target/debug/deps/libvolatile-a6274c63e85eedc4.rlib" "/opt/crater/target/debug/deps/libspin-121c099f003ea3e5.rlib" "/opt/crater/target/debug/deps/libbootloader_precompiled-489728d8e2968e5d.rlib" "/opt/crater/target/debug/deps/libos_bootinfo-65924abfed393c40.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2d032fe7d4e1e163.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-622fdce0dc084cba.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-a17fdd0a687135a8.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/test_basic_boot-152a0bb4a24f834b.test_basic_boot.cadj9dwg-cgu.2.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 `testos`.
[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/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libtestos-f2423f7139dc81f0.rlib" "/opt/crater/target/debug/deps/libuart_16550-b2a4a5e3ae961318.rlib" "/opt/crater/target/debug/deps/libx86_64-94fa78cb40e66d90.rlib" "/opt/crater/target/debug/deps/libux-efadc792039eb950.rlib" "/opt/crater/target/debug/deps/libusize_conversions-885df14c24659b2d.rlib" "/opt/crater/target/debug/deps/libbit_field-cd3bb28dc7f4af9e.rlib" "/opt/crater/target/debug/deps/libbitflags-4b832a9310b9b1d2.rlib" "/opt/crater/target/debug/deps/liblazy_static-de701c98ee84ab34.rlib" "/opt/crater/target/debug/deps/libspin-efe68d38fb3a8c35.rlib" "/opt/crater/target/debug/deps/libvolatile-a6274c63e85eedc4.rlib" "/opt/crater/target/debug/deps/libspin-121c099f003ea3e5.rlib" "/opt/crater/target/debug/deps/libbootloader_precompiled-489728d8e2968e5d.rlib" "/opt/crater/target/debug/deps/libos_bootinfo-65924abfed393c40.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2d032fe7d4e1e163.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-622fdce0dc084cba.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-a17fdd0a687135a8.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/test_exception_breakpoint-5564dd4c7b69f74f.test_exception_breakpoint.297l4txc-cgu.7.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 `testos`.
[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/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/testos-e98b80e02ed552d6" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libtestos-f2423f7139dc81f0.rlib" "/opt/crater/target/debug/deps/libuart_16550-b2a4a5e3ae961318.rlib" "/opt/crater/target/debug/deps/libx86_64-94fa78cb40e66d90.rlib" "/opt/crater/target/debug/deps/libux-efadc792039eb950.rlib" "/opt/crater/target/debug/deps/libusize_conversions-885df14c24659b2d.rlib" "/opt/crater/target/debug/deps/libbit_field-cd3bb28dc7f4af9e.rlib" "/opt/crater/target/debug/deps/libbitflags-4b832a9310b9b1d2.rlib" "/opt/crater/target/debug/deps/liblazy_static-de701c98ee84ab34.rlib" "/opt/crater/target/debug/deps/libspin-efe68d38fb3a8c35.rlib" "/opt/crater/target/debug/deps/libvolatile-a6274c63e85eedc4.rlib" "/opt/crater/target/debug/deps/libspin-121c099f003ea3e5.rlib" "/opt/crater/target/debug/deps/libbootloader_precompiled-489728d8e2968e5d.rlib" "/opt/crater/target/debug/deps/libos_bootinfo-65924abfed393c40.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2d032fe7d4e1e163.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-622fdce0dc084cba.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-a17fdd0a687135a8.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/testos-e98b80e02ed552d6.testos.8eeqo9w5-cgu.9.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 `testos`.
[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/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libtestos-f2423f7139dc81f0.rlib" "/opt/crater/target/debug/deps/libuart_16550-b2a4a5e3ae961318.rlib" "/opt/crater/target/debug/deps/libx86_64-94fa78cb40e66d90.rlib" "/opt/crater/target/debug/deps/libux-efadc792039eb950.rlib" "/opt/crater/target/debug/deps/libusize_conversions-885df14c24659b2d.rlib" "/opt/crater/target/debug/deps/libbit_field-cd3bb28dc7f4af9e.rlib" "/opt/crater/target/debug/deps/libbitflags-4b832a9310b9b1d2.rlib" "/opt/crater/target/debug/deps/liblazy_static-de701c98ee84ab34.rlib" "/opt/crater/target/debug/deps/libspin-efe68d38fb3a8c35.rlib" "/opt/crater/target/debug/deps/libvolatile-a6274c63e85eedc4.rlib" "/opt/crater/target/debug/deps/libspin-121c099f003ea3e5.rlib" "/opt/crater/target/debug/deps/libbootloader_precompiled-489728d8e2968e5d.rlib" "/opt/crater/target/debug/deps/libos_bootinfo-65924abfed393c40.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2d032fe7d4e1e163.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-622fdce0dc084cba.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-a17fdd0a687135a8.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/test_exception_double_fault_stack_overflow-f890caf0c6865a73.test_exception_double_fault_stack_overflow.7epgqcz9-cgu.7.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 `testos`.
[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/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/test_panic-e9fb62755f8c5e0d.test_panic.eexbuipy-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/test_panic-e9fb62755f8c5e0d.test_panic.eexbuipy-cgu.1.rcgu.o" "-o" "/opt/crater/target/debug/deps/test_panic-e9fb62755f8c5e0d" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libtestos-f2423f7139dc81f0.rlib" "/opt/crater/target/debug/deps/libuart_16550-b2a4a5e3ae961318.rlib" "/opt/crater/target/debug/deps/libx86_64-94fa78cb40e66d90.rlib" "/opt/crater/target/debug/deps/libux-efadc792039eb950.rlib" "/opt/crater/target/debug/deps/libusize_conversions-885df14c24659b2d.rlib" "/opt/crater/target/debug/deps/libbit_field-cd3bb28dc7f4af9e.rlib" "/opt/crater/target/debug/deps/libbitflags-4b832a9310b9b1d2.rlib" "/opt/crater/target/debug/deps/liblazy_static-de701c98ee84ab34.rlib" "/opt/crater/target/debug/deps/libspin-efe68d38fb3a8c35.rlib" "/opt/crater/target/debug/deps/libvolatile-a6274c63e85eedc4.rlib" "/opt/crater/target/debug/deps/libspin-121c099f003ea3e5.rlib" "/opt/crater/target/debug/deps/libbootloader_precompiled-489728d8e2968e5d.rlib" "/opt/crater/target/debug/deps/libos_bootinfo-65924abfed393c40.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2d032fe7d4e1e163.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-622fdce0dc084cba.rlib" "/opt/crater/rustup-home/toolchains/e212b7d492c96d3837691ba29d32d5f468933fb8-alt/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-a17fdd0a687135a8.rlib" "-Wl,-Bdynamic"
[INFO] [stderr]   = note: /opt/crater/target/debug/deps/test_panic-e9fb62755f8c5e0d.test_panic.eexbuipy-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 `testos`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7b92a86f19501640e6cc3bded77d94125ea4c562a972a357d4c1915c5853518c"`
[INFO] running `"docker" "rm" "-f" "7b92a86f19501640e6cc3bded77d94125ea4c562a972a357d4c1915c5853518c"`
[INFO] [stdout] 7b92a86f19501640e6cc3bded77d94125ea4c562a972a357d4c1915c5853518c