[INFO] cloning repository https://github.com/randomdevforyou/rust-random
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/randomdevforyou/rust-random" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frandomdevforyou%2Frust-random", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frandomdevforyou%2Frust-random'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0f845e76aa144b7f45e93d91104058744d870859
[INFO] building randomdevforyou/rust-random against try#334963c956d25708feab489a3816ae63f639355d for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frandomdevforyou%2Frust-random" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/randomdevforyou/rust-random on toolchain 334963c956d25708feab489a3816ae63f639355d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/randomdevforyou/rust-random
[INFO] finished tweaking git repo https://github.com/randomdevforyou/rust-random
[INFO] tweaked toml for git repo https://github.com/randomdevforyou/rust-random written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/randomdevforyou/rust-random 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" "+334963c956d25708feab489a3816ae63f639355d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 69895a6d9c02c34e9b7285343d2a620d502c7589f898cd25282ed5a7734a26eb
[INFO] running `Command { std: "docker" "start" "-a" "69895a6d9c02c34e9b7285343d2a620d502c7589f898cd25282ed5a7734a26eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "69895a6d9c02c34e9b7285343d2a620d502c7589f898cd25282ed5a7734a26eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69895a6d9c02c34e9b7285343d2a620d502c7589f898cd25282ed5a7734a26eb", kill_on_drop: false }`
[INFO] [stdout] 69895a6d9c02c34e9b7285343d2a620d502c7589f898cd25282ed5a7734a26eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b20b17fd9ef3567b7ac3a024e41f7682adfb965d103ee311ad80999ad89d5191
[INFO] running `Command { std: "docker" "start" "-a" "b20b17fd9ef3567b7ac3a024e41f7682adfb965d103ee311ad80999ad89d5191", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling regex-syntax v0.7.2
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[INFO] [stderr]    Compiling regex v1.8.4
[INFO] [stderr]    Compiling rust-random v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `hello_world_string`
[INFO] [stdout]   --> src/strings2.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |     let hello_world_string = hello_string + &world_string; // It takes ownership of hello_string and returns it back    
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_world_string`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_str`
[INFO] [stdout]    --> src/strings2.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |     let new_str = hello_str.push('o');
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_str2`
[INFO] [stdout]    --> src/strings2.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let new_str2 = hello_str.push_str(", World");
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_str2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]    --> src/strings2.rs:111:9
[INFO] [stdout]     |
[INFO] [stdout] 111 |     let first = &hello_str[0..1];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]    --> src/strings2.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |     let second = &hello_str[1..2];
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/problems/cat.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/strings2.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut hello_string = "Hello".to_string();
[INFO] [stdout]    |         ----^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/strings2.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let mut hello_string = "Hello";
[INFO] [stdout]    |         ----^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/strings2.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let mut hello_str = String::from("hello");
[INFO] [stdout]     |         ----^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]  --> src/strings.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let hello = String::from("Hello"); //immutable string
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello_slice`
[INFO] [stdout]   --> src/strings.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let hello_slice = &mut hello[0..5];
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word_slice`
[INFO] [stdout]   --> src/strings.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let word_slice = &mut hello[7..];
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reverse`
[INFO] [stdout]   --> src/strings.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let reverse = hello.chars().rev().collect::<String>();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reverse`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]   --> src/vectors.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let second = v1.get(1).unwrap(); 
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]    --> src/vectors.rs:189:9
[INFO] [stdout]     |
[INFO] [stdout] 189 |     let slice = &v15[..];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice2`
[INFO] [stdout]    --> src/vectors.rs:191:9
[INFO] [stdout]     |
[INFO] [stdout] 191 |     let slice2 = &mut v15[..]; 
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vectors.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let mut first = &mut v3[0];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vectors.rs:161:9
[INFO] [stdout]     |
[INFO] [stdout] 161 |     let mut iter = v13.iter_mut();
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vectors.rs:241:9
[INFO] [stdout]     |
[INFO] [stdout] 241 |     let mut v22 = vec![1,2,3,4,5];
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter`
[INFO] [stdout]  --> src/iterator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::iter;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter`
[INFO] [stdout]    --> src/iterator.rs:128:13
[INFO] [stdout]     |
[INFO] [stdout] 128 |     let mut iter = a.iter();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/iterator.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 128 |     let mut iter = a.iter();
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: LC_ALL="C" PATH="/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/rustlib/x86_64-unknown-linux-gnu/bin:/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/rustlib/x86_64-unknown-linux-gnu/bin/self-contained:/opt/rustwide/cargo-home/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" VSLANG="1033" "cc" "-m64" "/tmp/rustc115Qlb/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-d6f1d924b2f4233e.rlib,libpanic_unwind-00eb06e39850f679.rlib,libobject-d0382f11baa011b6.rlib,libmemchr-b7e2e2c1a7e4643d.rlib,libaddr2line-30ced7f1999cfa29.rlib,libgimli-3ee7e14c58e31ebd.rlib,librustc_demangle-a4f649bba77ffcc5.rlib,libstd_detect-c89a3ce7ad7c3dbd.rlib,libhashbrown-e1ce1d3d110c6707.rlib,librustc_std_workspace_alloc-e0604fecbf0f39dc.rlib,libminiz_oxide-0a9c6172f04822cc.rlib,libadler2-14a33f7117abcee7.rlib,libunwind-24c16adbe5e57356.rlib,libcfg_if-d2688d4a5c8e415b.rlib,liblibc-8ff7ba6d97853f27.rlib,liballoc-5c001d095eb077ec.rlib,librustc_std_workspace_core-395a38b8e0851c9b.rlib,libcore-d453bab70303062c.rlib,libcompiler_builtins-dd545221bb4f4734.rlib}" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-B/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/cat-4ecee7229abe9d4f" "-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]            #0 0x000072d132951ba7 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/libLLVM.so.19.1-rust-1.86.0-nightly+0x3f51ba7)
[INFO] [stdout]            #1 0x000072d132951fbc SignalHandler(int) (/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/libLLVM.so.19.1-rust-1.86.0-nightly+0x3f51fbc)
[INFO] [stdout]            #2 0x000072d1369b0520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
[INFO] [stdout]            #3 0x000072d136b0ebd7 (/lib/x86_64-linux-gnu/libc.so.6+0x1a0bd7)
[INFO] [stdout]            #4 0x00005f9dbff16c08 void lld::elf::InputSection::writeTo<llvm::object::ELFType<(llvm::endianness)1, true> >(unsigned char*) (/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/rustlib/x86_64-unknown-linux-gnu/bin/rust-lld+0x3ccc08)
[INFO] [stdout]            #5 0x00005f9dbff647e3 void lld::elf::OutputSection::writeTo<llvm::object::ELFType<(llvm::endianness)1, true> >(unsigned char*, llvm::parallel::TaskGroup&)::'lambda'(unsigned long, unsigned long)::operator()(unsigned long, unsigned long) const OutputSections.cpp:0:0
[INFO] [stdout]            #6 0x000072d1329033e2 std::_Function_handler<void (), llvm::parallel::TaskGroup::spawn(std::function<void ()>, bool)::$_0>::_M_invoke(std::_Any_data const&) (/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/libLLVM.so.19.1-rust-1.86.0-nightly+0x3f033e2)
[INFO] [stdout]            #7 0x000072d13290279a llvm::parallel::detail::(anonymous namespace)::ThreadPoolExecutor::work(llvm::ThreadPoolStrategy, unsigned int) (/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/libLLVM.so.19.1-rust-1.86.0-nightly+0x3f0279a)
[INFO] [stdout]            #8 0x000072d13287dd00 execute_native_thread_routine (/opt/rustwide/rustup-home/toolchains/334963c956d25708feab489a3816ae63f639355d/lib/libLLVM.so.19.1-rust-1.86.0-nightly+0x3e7dd00)
[INFO] [stdout]            #9 0x000072d136a02ac3 (/lib/x86_64-linux-gnu/libc.so.6+0x94ac3)
[INFO] [stdout]           #10 0x000072d136a93a04 __clone (/lib/x86_64-linux-gnu/libc.so.6+0x125a04)
[INFO] [stdout]           rust-lld: error: failed to write output '/opt/rustwide/target/debug/deps/cat-4ecee7229abe9d4f': No such file or directory
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-random` (bin "cat") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "b20b17fd9ef3567b7ac3a024e41f7682adfb965d103ee311ad80999ad89d5191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b20b17fd9ef3567b7ac3a024e41f7682adfb965d103ee311ad80999ad89d5191", kill_on_drop: false }`
[INFO] [stdout] b20b17fd9ef3567b7ac3a024e41f7682adfb965d103ee311ad80999ad89d5191
