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Clippy crashes in iter_overeager_cloned::check #8527

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remoun opened this issue Mar 12, 2022 · 8 comments · Fixed by #8602
Closed

Clippy crashes in iter_overeager_cloned::check #8527

remoun opened this issue Mar 12, 2022 · 8 comments · Fixed by #8602
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@giraffate
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I-ICE Issue: Clippy panicked, giving an Internal Compilation Error (ICE) ❄️

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@remoun
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remoun commented Mar 12, 2022

I ran into an unknown issue that crashes Clippy. I can reliably reproduce this with nightly-2022-02-22 and nightly-2022-03-10

Output:

error: internal compiler error: compiler/rustc_middle/src/ty/normalize_erasing_regions.rs:179:90: Failed to normalize <std::option::Option<&std::option::Option<std::time::Instant>> as std::iter::Iterator>::Item, maybe try to call `try_normalize_erasing_regions` instead

thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1236:9
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_middle::ty::normalize_erasing_regions::NormalizeAfterErasingRegionsFolder as rustc_middle::ty::fold::TypeFolder>::fold_ty
   8: clippy_utils::ty::get_associated_type
   9: clippy_lints::methods::iter_overeager_cloned::check
  10: <clippy_lints::methods::Methods as rustc_lint::passes::LateLintPass>::check_expr
  11: <rustc_lint::late::LateLintPassObjects as rustc_lint::passes::LateLintPass>::check_expr
  12: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  13: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_block
  14: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  15: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_body
  16: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_fn
  17: rustc_hir::intravisit::walk_impl_item::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  18: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_impl_item
  19: rustc_hir::intravisit::walk_impl_item_ref::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  20: rustc_hir::intravisit::walk_item::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  21: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_item
  22: rustc_hir::intravisit::walk_mod::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  23: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_mod
  24: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_item
  25: rustc_hir::intravisit::walk_mod::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  26: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_mod
  27: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_item
  28: rustc_hir::intravisit::walk_mod::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  29: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_mod
  30: rustc_lint::late::late_lint_pass_crate::<rustc_lint::late::LateLintPassObjects>
  31: rustc_lint::late::late_lint_crate::<rustc_lint::BuiltinCombinedLateLintPass>
  32: <rustc_session::session::Session>::time::<(), rustc_lint::late::check_crate<rustc_lint::BuiltinCombinedLateLintPass, rustc_interface::passes::analysis::{closure#5}::{closure#0}::{closure#2}::{closure#0}::{closure#0}>::{closure#0}::{closure#0}>
  33: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#5}::{closure#0}::{closure#2}::{closure#0}>
  34: <core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::passes::analysis::{closure#5}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
  35: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#5}>
  36: rustc_interface::passes::analysis
  37: <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::ErrorGuaranteed>>
  38: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), core::result::Result<(), rustc_errors::ErrorGuaranteed>>>
  39: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
  40: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#3}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
  41: <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::ErrorGuaranteed>>
  42: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
  43: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>
  44: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
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-clippy/issues/new

note: Clippy version: clippy 0.1.61 (458262b 2022-03-09)

query stack during panic:
#0 [analysis] running analysis passes on this crate
end of query stack
The following warnings were emitted during compilation:

warning: Compiling mc-consensus-service for SGX simulation mode

FWIW that 'warning' comes from a custom build script.
@remoun
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remoun commented Mar 12, 2022

This seems similar to #8320

@remoun remoun changed the title Clippy crashes Clippy crashes in iter_overeager_cloned::check Mar 12, 2022
@remoun remoun mentioned this issue Mar 12, 2022
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@matthiaskrgr matthiaskrgr added the I-ICE Issue: Clippy panicked, giving an Internal Compilation Error (ICE) ❄️ label Mar 12, 2022
@matthiaskrgr
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Looks like clippy trips over a rustc ice here
https://github.com/rust-lang/rust/issues?q=is%3Aissue+is%3Aopen+%22Failed+to+normalize%22

@giraffate
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It might be a duplicate of rust-lang/rust#93946.

@giraffate giraffate mentioned this issue Mar 14, 2022
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@goffrie
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goffrie commented Mar 28, 2022

Here is a reproducer:

fn cloned_flatten(x: Option<&Option<String>>) -> Option<String> {
    x.cloned().flatten()
}

The issue is that iter_overeager_cloned assumes that any expression it's called on implements Iterator (it uses get_iterator_item_ty which makes that assumption, per its doc comment, although the comments at the callsite suggest otherwise). However, it's called on any expression of the form X.cloned().flatten() (and a few other patterns as well) which is matched textually, so there's no guarantee that X is really an iterator.

@giraffate
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Thanks! I'll prepare the fix for this.

@giraffate giraffate self-assigned this Mar 29, 2022
@giraffate giraffate mentioned this issue Mar 29, 2022
Merged
@bors bors closed this as completed in c0a5693 Mar 30, 2022
@b-ncMN
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b-ncMN commented Apr 4, 2022

Has there been a regression on this ?
Issue seems to happen again on nightly-2022-03-29 | clippy 0.1.61 (ee915c3 2022-03-28) | rustc 1.61.0-nightly (ee915c34e 2022-03-28)
all the way to rustc 1.61.0-nightly / clippy 0.1.61 (eb82fac 2022-04-01), I have not tested this on more recent builds

error: internal compiler error: compiler/rustc_middle/src/ty/normalize_erasing_regions.rs:179:90: Failed to normalize <std::option::Option<&std::option::Option<usize>> as std::iter::Iterator>::Item, maybe try to call `try_normalize_erasing_regions` instead

thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1279:9
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_middle::ty::normalize_erasing_regions::NormalizeAfterErasingRegionsFolder as rustc_middle::ty::fold::TypeFolder>::fold_ty
   8: clippy_utils::ty::get_associated_type
   9: clippy_lints::methods::iter_overeager_cloned::check
  10: <clippy_lints::methods::Methods as rustc_lint::passes::LateLintPass>::check_expr
  11: <rustc_lint::late::LateLintPassObjects as rustc_lint::passes::LateLintPass>::check_expr
  12: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  13: rustc_hir::intravisit::walk_expr::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  14: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  15: rustc_hir::intravisit::walk_block::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  16: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_block
  17: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  18: rustc_hir::intravisit::walk_expr::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  19: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  20: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_block
  21: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  22: rustc_hir::intravisit::walk_expr::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  23: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  24: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_block
  25: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  26: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_body
  27: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_fn
  28: rustc_hir::intravisit::walk_expr::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  29: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  30: rustc_hir::intravisit::walk_expr::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  31: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  32: rustc_hir::intravisit::walk_block::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  33: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_block
  34: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  35: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_body
  36: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_fn
  37: rustc_hir::intravisit::walk_expr::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  38: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  39: rustc_hir::intravisit::walk_expr::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  40: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  41: rustc_hir::intravisit::walk_block::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  42: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_block
  43: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  44: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_body
  45: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_fn
  46: rustc_hir::intravisit::walk_expr::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  47: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  48: rustc_hir::intravisit::walk_expr::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  49: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  50: rustc_hir::intravisit::walk_block::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  51: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_block
  52: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_expr
  53: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_body
  54: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_fn
  55: rustc_hir::intravisit::walk_impl_item::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  56: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_impl_item
  57: rustc_hir::intravisit::walk_impl_item_ref::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  58: rustc_hir::intravisit::walk_item::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  59: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_item
  60: rustc_hir::intravisit::walk_mod::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  61: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_mod
  62: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_nested_item
  63: rustc_hir::intravisit::walk_mod::<rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects>>
  64: <rustc_lint::late::LateContextAndPass<rustc_lint::late::LateLintPassObjects> as rustc_hir::intravisit::Visitor>::visit_mod
  65: rustc_lint::late::late_lint_pass_crate::<rustc_lint::late::LateLintPassObjects>
  66: rustc_lint::late::late_lint_crate::<rustc_lint::BuiltinCombinedLateLintPass>
  67: <rustc_session::session::Session>::time::<(), rustc_lint::late::check_crate<rustc_lint::BuiltinCombinedLateLintPass, rustc_interface::passes::analysis::{closure#5}::{closure#0}::{closure#2}::{closure#0}::{closure#0}>::{closure#0}::{closure#0}>
  68: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#5}::{closure#0}::{closure#2}::{closure#0}>
  69: <core::panic::unwind_safe::AssertUnwindSafe<rustc_interface::passes::analysis::{closure#5}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
  70: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#5}>
  71: rustc_interface::passes::analysis
  72: <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::ErrorGuaranteed>>
  73: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), core::result::Result<(), rustc_errors::ErrorGuaranteed>>>
  74: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
  75: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#3}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
  76: <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::ErrorGuaranteed>>
  77: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
  78: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>
  79: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
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-clippy/issues/new
note: Clippy version: clippy 0.1.61 (eb82fac 2022-04-01)
query stack during panic:
#0 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error

error: could not compile `veloren-world` due to previous error
Process finished with exit code 101

@goffrie
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goffrie commented Apr 4, 2022 via email

@giraffate giraffate mentioned this issue Apr 8, 2022
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@fanninpm
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fanninpm commented Apr 8, 2022 •
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#8658, #8659, #8661, and #8662 seem to indicate that this ICE has unfortunately slipped into the latest stable (v1.60.0).

@Jarcho Jarcho mentioned this issue May 19, 2022
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@Miragecore Miragecore mentioned this issue Jun 11, 2022
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I-ICE Issue: Clippy panicked, giving an Internal Compilation Error (ICE) ❄️
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Fix ICE for iter_overeager_cloned giraffate/rust-clippy
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@remoun @matthiaskrgr @goffrie @giraffate @fanninpm @b-ncMN