could not compile `rocket`

[Dosan015]

Code

#[macro_use] extern crate rocket;

#[get("/")]
fn index() -> &'static str {
    "Hello, world!"
}

#[launch]
fn rocket() -> _ {
    rocket::build().mount("/", routes![index])
}

Meta

rustc --version --verbose:

rustc 1.60.0-nightly (e646f3d2a 2022-02-10)
binary: rustc
commit-hash: e646f3d2a9541952310778288854943678738ea9
commit-date: 2022-02-10
host: x86_64-unknown-linux-gnu
release: 1.60.0-nightly
LLVM version: 13.0.0

Error output

error: internal compiler error: encountered ambiguity selecting `Binder(<response::stream::reader::ReaderStream<impl futures::Stream<Item = response::stream::raw_sse::RawLinedEvent>> as std::convert::From<impl futures::Stream<Item = response::stream::raw_sse::RawLinedEvent>>>, [])` during codegen, presuming due to overflow or prior type error
  |
  = note: delayed at compiler/rustc_trait_selection/src/traits/codegen.rs:54:32

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:1176:13
stack backtrace:
   0:     0x7f91c62e7b7c - std::backtrace_rs::backtrace::libunwind::trace::hb4a65d880d51cc8a
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f91c62e7b7c - std::backtrace_rs::backtrace::trace_unsynchronized::h7869122ac9e9e614
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f91c62e7b7c - std::sys_common::backtrace::_print_fmt::h9fff32a009da8160
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7f91c62e7b7c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h08e4d8f078954af6
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7f91c634925c - core::fmt::write::he3a8c04c34cff473
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/core/src/fmt/mod.rs:1190:17
   5:     0x7f91c62d7ea8 - std::io::Write::write_fmt::h885fc3922042c55b
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/io/mod.rs:1657:15
   6:     0x7f91c62ebaf7 - std::sys_common::backtrace::_print::h491ea87d9bc93a80
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7f91c62ebaf7 - std::sys_common::backtrace::print::h172aa49b889b9de8
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7f91c62ebaf7 - std::panicking::default_hook::{{closure}}::h4b688a609ed3ca6c
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/panicking.rs:295:22
   9:     0x7f91c62eb7bf - std::panicking::default_hook::hcea89d8776676158
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/panicking.rs:314:9
  10:     0x7f91c6a79461 - rustc_driver[c1c4e25928df51ee]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7f91afe986c3 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hf5ca22e53410b8e5
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/alloc/src/boxed.rs:1868:9
  12:     0x7f91aff75c5c - proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}}::{{closure}}::hd34938b0721e2f9e
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/proc_macro/src/bridge/client.rs:319:21
  13:     0x7f91afea0ef0 - std::panicking::update_hook::{{closure}}::h59b588e0872d5493
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/panicking.rs:258:41
  14:     0x7f91c62ec3d5 - std::panicking::rust_panic_with_hook::hca08b43f72502df8
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/panicking.rs:702:17
  15:     0x7f91c62ec087 - std::panicking::begin_panic_handler::{{closure}}::hdf2d4b6030b5dc90
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/panicking.rs:588:13
  16:     0x7f91c62e8024 - std::sys_common::backtrace::__rust_end_short_backtrace::hf3c1e0f8da5136c0
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/sys_common/backtrace.rs:138:18
  17:     0x7f91c62ebd89 - rust_begin_unwind
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/panicking.rs:584:5
  18:     0x7f91c62b3d13 - core::panicking::panic_fmt::hbb5a63c753f090ac
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/core/src/panicking.rs:143:14
  19:     0x7f91c7b5beac - core[fa794259d154aa11]::panicking::panic_display::<&str>
  20:     0x7f91c91d8d5d - <rustc_errors[855a887cc3ed9e2e]::HandlerInner>::flush_delayed
  21:     0x7f91c91d721d - <rustc_errors[855a887cc3ed9e2e]::HandlerInner as core[fa794259d154aa11]::ops::drop::Drop>::drop
  22:     0x7f91c88fe4c6 - core[fa794259d154aa11]::ptr::drop_in_place::<rustc_session[c7afb65815eaf95d]::parse::ParseSess>
  23:     0x7f91c8900cfa - <alloc[3e5e74730c8aadd3]::rc::Rc<rustc_session[c7afb65815eaf95d]::session::Session> as core[fa794259d154aa11]::ops::drop::Drop>::drop
  24:     0x7f91c88e598c - core[fa794259d154aa11]::ptr::drop_in_place::<rustc_interface[757d9d568b28c175]::interface::Compiler>
  25:     0x7f91c88eea6a - rustc_interface[757d9d568b28c175]::interface::create_compiler_and_run::<core[fa794259d154aa11]::result::Result<(), rustc_errors[855a887cc3ed9e2e]::ErrorReported>, rustc_driver[c1c4e25928df51ee]::run_compiler::{closure#1}>
  26:     0x7f91c88d157b - <scoped_tls[28c23cd987957e09]::ScopedKey<rustc_span[19937ed525521566]::SessionGlobals>>::set::<rustc_interface[757d9d568b28c175]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[757d9d568b28c175]::interface::run_compiler<core[fa794259d154aa11]::result::Result<(), rustc_errors[855a887cc3ed9e2e]::ErrorReported>, rustc_driver[c1c4e25928df51ee]::run_compiler::{closure#1}>::{closure#0}, core[fa794259d154aa11]::result::Result<(), rustc_errors[855a887cc3ed9e2e]::ErrorReported>>::{closure#0}::{closure#0}, core[fa794259d154aa11]::result::Result<(), rustc_errors[855a887cc3ed9e2e]::ErrorReported>>
  27:     0x7f91c8908675 - std[90db525a6f5ba74e]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[757d9d568b28c175]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[757d9d568b28c175]::interface::run_compiler<core[fa794259d154aa11]::result::Result<(), rustc_errors[855a887cc3ed9e2e]::ErrorReported>, rustc_driver[c1c4e25928df51ee]::run_compiler::{closure#1}>::{closure#0}, core[fa794259d154aa11]::result::Result<(), rustc_errors[855a887cc3ed9e2e]::ErrorReported>>::{closure#0}, core[fa794259d154aa11]::result::Result<(), rustc_errors[855a887cc3ed9e2e]::ErrorReported>>
  28:     0x7f91c8906d79 - <<std[90db525a6f5ba74e]::thread::Builder>::spawn_unchecked_<rustc_interface[757d9d568b28c175]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[757d9d568b28c175]::interface::run_compiler<core[fa794259d154aa11]::result::Result<(), rustc_errors[855a887cc3ed9e2e]::ErrorReported>, rustc_driver[c1c4e25928df51ee]::run_compiler::{closure#1}>::{closure#0}, core[fa794259d154aa11]::result::Result<(), rustc_errors[855a887cc3ed9e2e]::ErrorReported>>::{closure#0}, core[fa794259d154aa11]::result::Result<(), rustc_errors[855a887cc3ed9e2e]::ErrorReported>>::{closure#1} as core[fa794259d154aa11]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  29:     0x7f91c62f7e23 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::haee003b45429b010
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/alloc/src/boxed.rs:1854:9
  30:     0x7f91c62f7e23 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1ab610143d2ab06b
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/alloc/src/boxed.rs:1854:9
  31:     0x7f91c62f7e23 - std::sys::unix::thread::Thread::new::thread_start::h7a28367fea04484f
                               at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/sys/unix/thread.rs:108:17
  32:     0x7f91c5e346db - start_thread
  33:     0x7f91c595588f - __clone
  34:                0x0 - <unknown>

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.60.0-nightly (e646f3d2a 2022-02-10) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
error: could not compile `rocket`

Backtrace

0: rust_begin_unwind
             at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/panicking.rs:584:5
   1: core::panicking::panic_fmt
             at /rustc/e646f3d2a9541952310778288854943678738ea9/library/core/src/panicking.rs:143:14
   2: core::panicking::panic_display::<&str>
   3: <rustc_errors::HandlerInner>::flush_delayed
   4: <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop
   5: core::ptr::drop_in_place::<rustc_session::parse::ParseSess>
   6: <alloc::rc::Rc<rustc_session::session::Session> as core::ops::drop::Drop>::drop
   7: core::ptr::drop_in_place::<rustc_interface::interface::Compiler>
   8: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>
   9: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[Scarjit]

Reproduceable on Windows

Code

#[macro_use] extern crate rocket;

#[get("/")]
fn index() -> &'static str {
    "Hello, world!"
}

#[rocket::main]
async fn main()  {
    rocket::build().mount("/", routes![index]);
}

[dependencies]
rocket = "0.5.0-rc.1"

Meta

rustc --version --verbose:

rustc 1.60.0-nightly (e646f3d2a 2022-02-10)
binary: rustc
commit-hash: e646f3d2a9541952310778288854943678738ea9
commit-date: 2022-02-10
host: x86_64-pc-windows-msvc
release: 1.60.0-nightly
LLVM version: 13.0.0

Error output

error: internal compiler error: encountered ambiguity selecting `Binder(<response::stream::reader::ReaderStream<impl futures::Stream<Item = response::stream::raw_sse::RawLinedEvent>> as std::convert::From<impl futures::Stream<Item = response::stream::raw_sse::RawLinedEvent>>>, [])` during codegen, presuming due to overflow or prior type error
  |
  = note: delayed at compiler\rustc_trait_selection\src\traits\codegen.rs:54:32

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler\rustc_errors\src\lib.rs:1176:13

Backtrace

stack backtrace:
   0:     0x7ffded817d30 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he09221c2d444dfe1
   1:     0x7ffded84779a - core::fmt::write::h7c00eda1e723c654
   2:     0x7ffded809059 - <std::io::IoSlice as core::fmt::Debug>::fmt::h793e0aeaf1fec88d
   3:     0x7ffded81b4a2 - std::panicking::default_hook::h608d4dde448f0c29
   4:     0x7ffded81b063 - std::panicking::default_hook::h608d4dde448f0c29
   5:     0x7ffdd649ec09 - <rustc_driver[416e5eba3e41cb3]::args::Error as core[984dcdc6a6b66ef3]::fmt::Debug>::fmt
   6:     0x7ffded81bdd2 - std::panicking::rust_panic_with_hook::h1b80c96e85e80f64
   7:     0x7ffded81bb1d - <std::panicking::begin_panic_handler::StrPanicPayload as core::panic::BoxMeUp>::get::hba826596c7be7c9e
   8:     0x7ffded818687 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he09221c2d444dfe1
   9:     0x7ffded81b799 - rust_begin_unwind
  10:     0x7ffded87a985 - core::panicking::panic_fmt::h987a325189bd1697
  11:     0x7ffddabfc7e7 - <rustc_errors[c29ebb7dd1d8d943]::ErrorReported as core[984dcdc6a6b66ef3]::fmt::Debug>::fmt
  12:     0x7ffddabf94b8 - <rustc_errors[c29ebb7dd1d8d943]::HandlerInner>::delay_as_bug
  13:     0x7ffddabf49c2 - <rustc_errors[c29ebb7dd1d8d943]::HandlerInner as core[984dcdc6a6b66ef3]::ops::drop::Drop>::drop
  14:     0x7ffdd6497224 - <rustc_driver[416e5eba3e41cb3]::args::Error as core[984dcdc6a6b66ef3]::fmt::Debug>::fmt
  15:     0x7ffdd649b427 - <rustc_driver[416e5eba3e41cb3]::args::Error as core[984dcdc6a6b66ef3]::fmt::Debug>::fmt
  16:     0x7ffdd64339dd - <rustc_middle[36d3a5273b30a1f]::ty::SymbolName as core[984dcdc6a6b66ef3]::fmt::Debug>::fmt
  17:     0x7ffdd6437ff0 - <rustc_driver[416e5eba3e41cb3]::args::Error as core[984dcdc6a6b66ef3]::fmt::Debug>::fmt
  18:     0x7ffdd642d53a - <rustc_codegen_ssa[71a279e59bdb6602]::back::linker::MsvcLinker as rustc_codegen_ssa[71a279e59bdb6602]::back::linker::Linker>::optimize
  19:     0x7ffdd640e383 - <rustc_codegen_ssa[71a279e59bdb6602]::back::linker::MsvcLinker as rustc_codegen_ssa[71a279e59bdb6602]::back::linker::Linker>::optimize
  20:     0x7ffdd64b5138 - rustc_driver[416e5eba3e41cb3]::pretty::print_after_hir_lowering
  21:     0x7ffded82c73c - std::sys::windows::thread::Thread::new::h5fb28379b94c9474
  22:     0x7ffe7f1854e0 - BaseThreadInitThunk
  23:     0x7ffe7fee485b - RtlUserThreadStart

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.60.0-nightly (e646f3d2a 2022-02-10) running on x86_64-pc-windows-msvc

note: compiler flags: --crate-type rlib -C embed-bitcode=no -C debuginfo=2

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
error: could not compile `rocket`

[chris-morgan]

I just hit this building Conduit (having just updated rustc nightly).

    Updating crates.io index
    Updating git repository `https://github.com/timokoesters/reqwest`
    Updating git repository `https://github.com/ruma/ruma`
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  Downloaded futures-task v0.3.19
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  Downloaded minimal-lexical v0.2.1
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  Downloaded indexmap v1.8.0
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  Downloaded serde_yaml v0.8.23
  Downloaded mio v0.7.14
  Downloaded os_str_bytes v6.0.0
  Downloaded nom v7.1.0
  Downloaded hmac v0.11.0
  Downloaded bindgen v0.59.2
  Downloaded tracing-subscriber v0.2.25
  Downloaded once_cell v1.9.0
  Downloaded futures-core v0.3.19
  Downloaded getrandom v0.2.4
  Downloaded futures-util v0.3.19
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  Downloaded rusqlite v0.25.4
  Downloaded 116 crates (16.3 MB) in 2.49s (largest was `librocksdb-sys` at 8.1 MB)
   Compiling proc-macro2 v1.0.36
   Compiling unicode-xid v0.2.2
   Compiling syn v1.0.86
   Compiling version_check v0.9.4
   Compiling libc v0.2.113
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error: internal compiler error: encountered ambiguity selecting `Binder(<response::stream::reader::ReaderStream<impl futures::Stream<Item = response::stream::raw_sse::RawLinedEvent>> as std::convert::From<impl futures::Stream<Item = response::stream::raw_sse::RawLinedEvent>>>, [])` during codegen, presuming due to overflow or prior type error
  |
  = note: delayed at compiler/rustc_trait_selection/src/traits/codegen.rs:54:32

thread 'rustc' panicked at 'no errors encountered even though `delay_span_bug` issued', compiler/rustc_errors/src/lib.rs:1176:13
stack backtrace:
   0: rust_begin_unwind
             at /rustc/e646f3d2a9541952310778288854943678738ea9/library/std/src/panicking.rs:584:5
   1: core::panicking::panic_fmt
             at /rustc/e646f3d2a9541952310778288854943678738ea9/library/core/src/panicking.rs:143:14
   2: core::panicking::panic_display::<&str>
   3: <rustc_errors::HandlerInner>::flush_delayed
   4: <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop
   5: core::ptr::drop_in_place::<rustc_session::parse::ParseSess>
   6: <alloc::rc::Rc<rustc_session::session::Session> as core::ops::drop::Drop>::drop
   7: core::ptr::drop_in_place::<rustc_interface::interface::Compiler>
   8: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>
   9: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.60.0-nightly (e646f3d2a 2022-02-10) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C opt-level=3 -C linker-plugin-lto -C codegen-units=32

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
error: could not compile `rocket`
warning: build failed, waiting for other jobs to finish...
error: build failed

[ehuss]

Thanks for the reports, closing as a duplicate of #93831.