Closed
Description
Code
use std::ops::Add;
struct Point<T> {
x: T,
y: T,
}
impl<'a, T> Add for &'a Point<T>
where
for<'x> &'x T: Add<Output = T>,
{
type Output = Point<T>;
fn add(self, rhs: Self) -> Self::Output {
Point {
x: &self.x + &rhs.x,
y: &self.y + &rhs.y,
}
}
}
fn add<T, U>(x: T, y: T) -> T
where
T: From<U>,
for<'x> &'x T: Add<Output = U>,
{
T::from(&x + &y)
}
fn main() {
let x = 2;
let y = 3;
//let a = add(x, y); // E0275
let b = add::<i32>(x, y); // ICE
//let c = add::<i32, i32>(x, y); // works
}
Meta
rustc --version --verbose
:
rustc 1.59.0-beta.7 (f58f0dfd7 2022-02-11)
binary: rustc
commit-hash: f58f0dfd7261dba0cafc25273d8158b6965c7695
commit-date: 2022-02-11
host: x86_64-unknown-linux-gnu
release: 1.59.0-beta.7
LLVM version: 13.0.0
Error output
error[E0107]: this function takes 2 generic arguments but 1 generic argument was supplied
--> src/main.rs:32:13
|
32 | let b = add::<i32>(x, y); // ICE
| ^^^ --- supplied 1 generic argument
| |
| expected 2 generic arguments
|
note: function defined here, with 2 generic parameters: `T`, `U`
--> src/main.rs:20:4
|
20 | fn add<T, U>(x: T, y: T) -> T
| ^^^ - -
help: add missing generic argument
|
32 | let b = add::<i32, U>(x, y); // ICE
| +++
error: internal compiler error: compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs:855:17: ErrorReporting Overflow should not reach `report_selection_err` call
thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1169:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
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 1.59.0-beta.7 (f58f0dfd7 2022-02-11) running on x86_64-unknown-linux-gnu
note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental -C target-cpu=native --crate-type bin
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [typeck] type-checking `main`
#1 [typeck_item_bodies] type-checking all item bodies
end of query stack
For more information about this error, try `rustc --explain E0107`.
error: could not compile `report-bug` due to previous error
Backtrace
error[E0107]: this function takes 2 generic arguments but 1 generic argument was supplied
--> src/main.rs:32:13
|
32 | let b = add::<i32>(x, y); // ICE
| ^^^ --- supplied 1 generic argument
| |
| expected 2 generic arguments
|
note: function defined here, with 2 generic parameters: `T`, `U`
--> src/main.rs:20:4
|
20 | fn add<T, U>(x: T, y: T) -> T
| ^^^ - -
help: add missing generic argument
|
32 | let b = add::<i32, U>(x, y); // ICE
| +++
error: internal compiler error: compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs:855:17: ErrorReporting Overflow should not reach `report_selection_err` call
thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1169:9
stack backtrace:
0: std::panicking::begin_panic::<rustc_errors::ExplicitBug>
1: std::panic::panic_any::<rustc_errors::ExplicitBug>
2: <rustc_errors::HandlerInner>::bug
3: <rustc_errors::Handler>::bug
4: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, ()>
5: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>
6: rustc_middle::util::bug::bug_fmt
7: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtExt>::report_selection_error
8: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
9: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtExt>::report_fulfillment_errors
10: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_call
11: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
12: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
13: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_decl
14: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_stmt
15: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_with_expected
16: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
17: rustc_typeck::check::check::check_fn
18: <rustc_infer::infer::InferCtxtBuilder>::enter::<&rustc_middle::ty::context::TypeckResults, <rustc_typeck::check::inherited::InheritedBuilder>::enter<rustc_typeck::check::typeck_with_fallback<rustc_typeck::check::typeck::{closure#0}>::{closure#1}, &rustc_middle::ty::context::TypeckResults>::{closure#0}>
19: rustc_typeck::check::typeck
20: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId, &rustc_middle::ty::context::TypeckResults>
21: rustc_data_structures::stack::ensure_sufficient_stack::<(&rustc_middle::ty::context::TypeckResults, rustc_query_system::dep_graph::graph::DepNodeIndex), rustc_query_system::query::plumbing::execute_job<rustc_query_impl::plumbing::QueryCtxt, rustc_span::def_id::LocalDefId, &rustc_middle::ty::context::TypeckResults>::{closure#3}>
22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalDefId, &rustc_middle::ty::context::TypeckResults>>
23: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck
24: <rustc_middle::hir::map::Map>::par_body_owners::<rustc_typeck::check::typeck_item_bodies::{closure#0}>
25: rustc_typeck::check::typeck_item_bodies
26: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), ()>
27: rustc_data_structures::stack::ensure_sufficient_stack::<((), rustc_query_system::dep_graph::graph::DepNodeIndex), rustc_query_system::query::plumbing::execute_job<rustc_query_impl::plumbing::QueryCtxt, (), ()>::{closure#3}>
28: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), ()>>
29: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
30: <rustc_session::session::Session>::time::<(), rustc_typeck::check_crate::{closure#7}>
31: rustc_typeck::check_crate
32: rustc_interface::passes::analysis
33: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), core::result::Result<(), rustc_errors::ErrorReported>>
34: rustc_data_structures::stack::ensure_sufficient_stack::<(core::result::Result<(), rustc_errors::ErrorReported>, rustc_query_system::dep_graph::graph::DepNodeIndex), rustc_query_system::query::plumbing::execute_job<rustc_query_impl::plumbing::QueryCtxt, (), core::result::Result<(), rustc_errors::ErrorReported>>::{closure#3}>
35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), core::result::Result<(), rustc_errors::ErrorReported>>>
36: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
37: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorReported>>
38: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorReported>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
39: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>
40: <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.
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 1.59.0-beta.7 (f58f0dfd7 2022-02-11) running on x86_64-unknown-linux-gnu
note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental -C target-cpu=native --crate-type bin
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [typeck] type-checking `main`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack
For more information about this error, try `rustc --explain E0107`.
error: could not compile `report-bug` due to previous error