Rustc panicked at 'found unstable fingerprints...

Code

use std::fs::File;
use std::io::Error;

fn main() -> Result<(), Error > {
    let mut f = File::open("d:\\play")?;
    println! ( "{:?}", f.metadata()? );
    Ok(())
}

Error output

thread 'rustc' panicked at 'found unstable fingerprints for predicates_of(core[c0d5]::ops::function::Fn): GenericPredicates { parent: None, predicates: [(Binder(TraitPredicate(<Self as std::ops::FnMut<Args>>)), C:\Users\mmatic\.rustup\toolchains\beta-x86_64-pc-windows-msvc\lib/rustlib/src/rust\library\core\src\ops\function.rs:67:21: 67:32 (#0)), (Binder(TraitPredicate(<Args as std::marker::Sized>)), C:\Users\mmatic\.rustup\toolchains\beta-x86_64-pc-windows-msvc\lib/rustlib/src/rust\library\core\src\ops\function.rs:67:14: 67:18 (#0)), (Binder(TraitPredicate(<Self as std::ops::Fn<Args>>)), C:\Users\mmatic\.rustup\toolchains\beta-x86_64-pc-windows-msvc\lib/rustlib/src/rust\library\core\src\ops\function.rs:67:1: 67:32 (#0))] }', /rustc/9a1dfd2dc5c42a2ee84b4606aa08cdadf8c0ee87\compiler\rustc_query_system\src\query\plumbing.rs:593:5

Backtrace

``` stack backtrace: 0: 0x7fff146f81fe - ::fmt::hfae6ccd854213db1 1: 0x7fff1472334c - core::fmt::write::h44ad4f19d689cef1 2: 0x7fff146ebc58 - ::fmt::hef43a6d5a8368ca5 3: 0x7fff146fc39d - std::panicking::take_hook::h576dd54ad12ab799 4: 0x7fff146fbe69 - std::panicking::take_hook::h576dd54ad12ab799 5: 0x7ffedc6fcc77 - rustc_driver::report_ice::h0e8f32f8e59244df 6: 0x7fff146fcbf5 - std::panicking::rust_panic_with_hook::hb37cfa34adb9ae3b 7: 0x7fff146fc761 - rust_begin_unwind 8: 0x7fff146f8b4f - ::fmt::hfae6ccd854213db1 9: 0x7fff146fc6b9 - rust_begin_unwind 10: 0x7fff14754e5c - std::panicking::begin_panic_fmt::hc213a848dd3c30a4 11: 0x7ffedf2c927c - ::visit_foreign_item::hfd666d4312c2a266 12: 0x7ffedf2ecb84 - ::visit_foreign_item::hfd666d4312c2a266 13: 0x7ffedf521b1b - ::store_diagnostics_for_anon_node::hb5811461be3bf9fd 14: 0x7ffedf17f890 - ::visit_foreign_item::hfd666d4312c2a266 15: 0x7ffedf43fabd - ::try_print_query_stack::hdb6006e63bb98d44 16: 0x7ffee072c302 - rustc_middle::ty::generics::GenericPredicates::instantiate_identity::hd6560ca2219c0438 17: 0x7ffee072bfd7 - rustc_middle::ty::generics::GenericPredicates::instantiate_identity::hd6560ca2219c0438 18: 0x7ffee0346743 - rustc_trait_selection::traits::object_safety::trait_has_sized_self::ha401491b40e947b7 19: 0x7ffee0362402 - ::fmt::h9d30ed7c3b0ddc93 20: 0x7ffee0385ef6 - ::fmt::h09a11af9605709a0 21: 0x7ffee038f27f - ::fmt::h09a11af9605709a0 22: 0x7ffee0ae3122 - serde::private::de::content::Content::unexpected::hcdf7533a6ecf3e66 23: 0x7ffee03a0399 - ::fmt::h8c672a6260f616f4 24: 0x7ffee036ee6c - rustc_trait_selection::traits::impossible_predicates::ha6883a6941a106f9 25: 0x7ffedf3067e7 - ::visit_foreign_item::hfd666d4312c2a266 26: 0x7ffedf507699 - ::store_diagnostics_for_anon_node::hb5811461be3bf9fd 27: 0x7ffedf2e58d3 - ::visit_foreign_item::hfd666d4312c2a266 28: 0x7ffedf51ea23 - ::store_diagnostics_for_anon_node::hb5811461be3bf9fd 29: 0x7ffedf1cbe7e - ::visit_foreign_item::hfd666d4312c2a266 30: 0x7ffedf445cae - ::try_print_query_stack::hdb6006e63bb98d44 31: 0x7ffedf830e68 - ::visit_rvalue::hdbc596ee232d9751 32: 0x7ffedf8355cb - ::visit_impl_item::h80686928bd6f6035 33: 0x7ffedf82ddc3 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h43129fad64ba08dd 34: 0x7ffedf82c748 - rustc_mir::monomorphize::collector::collect_crate_mono_items::h43129fad64ba08dd 35: 0x7ffedfb26f89 - rustc_mir::monomorphize::partitioning::partition::h1924b0707b0b680b 36: 0x7ffedf30978a - ::visit_foreign_item::hfd666d4312c2a266 37: 0x7ffedf507371 - ::store_diagnostics_for_anon_node::hb5811461be3bf9fd 38: 0x7ffedf4765da - ::try_print_query_stack::hdb6006e63bb98d44 39: 0x7ffedf52762b - ::store_diagnostics_for_anon_node::hb5811461be3bf9fd 40: 0x7ffedf26833b - ::visit_foreign_item::hfd666d4312c2a266 41: 0x7ffedf21d0bb - ::visit_foreign_item::hfd666d4312c2a266 42: 0x7ffedf449ec8 - ::try_print_query_stack::hdb6006e63bb98d44 43: 0x7ffedc98f23a - ::codegen_crate::h77287877865bcd4f 44: 0x7ffedc84f6b2 - rustc_interface::passes::BoxedResolver::to_resolver_outputs::h4ec63178a769446e 45: 0x7ffedc85b4e6 - rustc_interface::queries::Queries::ongoing_codegen::hee71184e618ccde0 46: 0x7ffedc715b17 - ::fmt::h143405f70f01b5db 47: 0x7ffedc6ff97c - ::fmt::h5e3ec1c3f42432f1 48: 0x7ffedc716d17 - ::fmt::h143405f70f01b5db 49: 0x7ffedc707084 - rustc_driver::pretty::print_after_hir_lowering::hdbb70a4ca15139bc 50: 0x7ffedc718c6f - ::fmt::h143405f70f01b5db 51: 0x7ffedc73876d - ::fmt::h143405f70f01b5db 52: 0x7fff1470bc9a - std::sys::windows::thread::Thread::new::h58f8eb2e5a02b455 53: 0x7fff8f177034 - BaseThreadInitThunk 54: 0x7fff90e42651 - 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 1.52.0-beta.7 (9a1dfd2dc 2021-04-30) running on x86_64-pc-windows-msvc note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type bin note: some of the compiler flags provided by cargo are hidden query stack during panic: #0 [predicates_of] computing predicates of `std::ops::Fn` #1 [vtable_methods] finding all methods for trait std::ops::Fn #2 [collect_and_partition_mono_items] collect_and_partition_mono_items end of query stack ```

rust-lang / rust

Rustc panicked at 'found unstable fingerprints... #84898

Code

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Error output