miri ICEs on too large types where rustc just errors

[matthiaskrgr]

fn main() {
    let _fat: [u8; (1<<61)+(1<<31)] = //~ ERROR too big for the current architecture
        [0; (1u64<<61) as usize +(1u64<<31) as usize];
}

rustc: "I see what you did there":smirk:

error: values of the type `[u8; 2305843011361177600]` are too big for the current architecture
 --> src/main.rs:2:9
  |
2 |     let _fat: [u8; (1<<61)+(1<<31)] = //~ ERROR too big for the current architecture
  |         ^^^^

error: aborting due to previous error

miri: 😱

error: internal compiler error: src/tools/miri/src/diagnostics.rs:190:21: This error should be impossible in Miri: values of the type `[u8; 2305843011361177600]` are too big for the current architecture

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/compiler/rustc_errors/src/lib.rs:1313:9
stack backtrace:
   0:     0x7fc5dae9dfcd - std::backtrace_rs::backtrace::libunwind::trace::h008bfa4d47668920
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fc5dae9dfcd - std::backtrace_rs::backtrace::trace_unsynchronized::h27b8baa167def365
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fc5dae9dfcd - std::sys_common::backtrace::_print_fmt::h14cfba2b17ab0c8e
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7fc5dae9dfcd - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hcc0f07ba1953872c
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7fc5daef9d4c - core::fmt::write::heefc9b0106ff4b26
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/core/src/fmt/mod.rs:1194:17
   5:     0x7fc5dae8f6c1 - std::io::Write::write_fmt::h17f586ea6872643e
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/io/mod.rs:1655:15
   6:     0x7fc5daea0ce5 - std::sys_common::backtrace::_print::h1d24983408f9dcb5
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7fc5daea0ce5 - std::sys_common::backtrace::print::h3dfa044f75ad3854
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7fc5daea0ce5 - std::panicking::default_hook::{{closure}}::h0d1e2fd3193b7c66
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/panicking.rs:295:22
   9:     0x7fc5daea0959 - std::panicking::default_hook::ha7798f571e103017
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/panicking.rs:314:9
  10:     0x7fc5db6ce721 - rustc_driver[24333cd5cdbff7]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7fc5daea14b6 - std::panicking::rust_panic_with_hook::hd4ae5780d84eaeb3
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/panicking.rs:702:17
  12:     0x7fc5dc76d211 - std[e3663ace07a47676]::panicking::begin_panic::<rustc_errors[444e5733760837c]::ExplicitBug>::{closure#0}
  13:     0x7fc5dc76cb26 - std[e3663ace07a47676]::sys_common::backtrace::__rust_end_short_backtrace::<std[e3663ace07a47676]::panicking::begin_panic<rustc_errors[444e5733760837c]::ExplicitBug>::{closure#0}, !>
  14:     0x7fc5dc6c7b5f - std[e3663ace07a47676]::panicking::begin_panic::<rustc_errors[444e5733760837c]::ExplicitBug>
  15:     0x7fc5dc681726 - std[e3663ace07a47676]::panic::panic_any::<rustc_errors[444e5733760837c]::ExplicitBug>
  16:     0x7fc5dc67adc5 - <rustc_errors[444e5733760837c]::HandlerInner>::bug::<&alloc[3a33fef0fcfbda16]::string::String>
  17:     0x7fc5dc67a7d0 - <rustc_errors[444e5733760837c]::Handler>::bug::<&alloc[3a33fef0fcfbda16]::string::String>
  18:     0x7fc5dc77376d - rustc_middle[78f77a4b50da5456]::ty::context::tls::with_opt::<rustc_middle[78f77a4b50da5456]::util::bug::opt_span_bug_fmt<rustc_span[ae3b8a4be6f596eb]::span_encoding::Span>::{closure#0}, ()>
  19:     0x7fc5dc773946 - rustc_middle[78f77a4b50da5456]::util::bug::opt_span_bug_fmt::<rustc_span[ae3b8a4be6f596eb]::span_encoding::Span>
  20:     0x7fc5dc7738b3 - rustc_middle[78f77a4b50da5456]::util::bug::bug_fmt
  21:     0x55c3e7af314d - miri[7adf390157a6bbd]::diagnostics::report_error
  22:     0x55c3e7af9ae3 - miri[7adf390157a6bbd]::eval::eval_entry
  23:     0x55c3e7a6585b - <rustc_interface[e01f10fbcfbe47c5]::passes::QueryContext>::enter::<<miri[3f3a2e771ed60824]::MiriCompilerCalls as rustc_driver[24333cd5cdbff7]::Callbacks>::after_analysis::{closure#0}, ()>
  24:     0x55c3e7a684ce - <miri[3f3a2e771ed60824]::MiriCompilerCalls as rustc_driver[24333cd5cdbff7]::Callbacks>::after_analysis
  25:     0x7fc5dd712f75 - <rustc_interface[e01f10fbcfbe47c5]::interface::Compiler>::enter::<rustc_driver[24333cd5cdbff7]::run_compiler::{closure#1}::{closure#2}, core[373cc1b435eedd77]::result::Result<core[373cc1b435eedd77]::option::Option<rustc_interface[e01f10fbcfbe47c5]::queries::Linker>, rustc_errors[444e5733760837c]::ErrorGuaranteed>>
  26:     0x7fc5dd73c73f - rustc_span[ae3b8a4be6f596eb]::with_source_map::<core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>, rustc_interface[e01f10fbcfbe47c5]::interface::create_compiler_and_run<core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>, rustc_driver[24333cd5cdbff7]::run_compiler::{closure#1}>::{closure#1}>
  27:     0x7fc5dd727234 - rustc_interface[e01f10fbcfbe47c5]::interface::create_compiler_and_run::<core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>, rustc_driver[24333cd5cdbff7]::run_compiler::{closure#1}>
  28:     0x7fc5dd710292 - <scoped_tls[8d6377a96f770454]::ScopedKey<rustc_span[ae3b8a4be6f596eb]::SessionGlobals>>::set::<rustc_interface[e01f10fbcfbe47c5]::interface::run_compiler<core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>, rustc_driver[24333cd5cdbff7]::run_compiler::{closure#1}>::{closure#0}, core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>>
  29:     0x7fc5dd7370af - std[e3663ace07a47676]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[e01f10fbcfbe47c5]::util::run_in_thread_pool_with_globals<rustc_interface[e01f10fbcfbe47c5]::interface::run_compiler<core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>, rustc_driver[24333cd5cdbff7]::run_compiler::{closure#1}>::{closure#0}, core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>>::{closure#0}, core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>>
  30:     0x7fc5dd7296a9 - <<std[e3663ace07a47676]::thread::Builder>::spawn_unchecked_<rustc_interface[e01f10fbcfbe47c5]::util::run_in_thread_pool_with_globals<rustc_interface[e01f10fbcfbe47c5]::interface::run_compiler<core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>, rustc_driver[24333cd5cdbff7]::run_compiler::{closure#1}>::{closure#0}, core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>>::{closure#0}, core[373cc1b435eedd77]::result::Result<(), rustc_errors[444e5733760837c]::ErrorGuaranteed>>::{closure#1} as core[373cc1b435eedd77]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  31:     0x7fc5daeab403 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::haef26bcd4f755601
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/alloc/src/boxed.rs:1866:9
  32:     0x7fc5daeab403 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3a96fd989239d901
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/alloc/src/boxed.rs:1866:9
  33:     0x7fc5daeab403 - std::sys::unix::thread::Thread::new::thread_start::h13804fa7b9eb440b
                               at /rustc/082e4ca49770ebc9cb0ee616f3726a67471be8cb/library/std/src/sys/unix/thread.rs:108:17
  34:     0x7fc5dac835c2 - start_thread
  35:     0x7fc5dad08584 - __clone
  36:                0x0 - <unknown>

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 1.62.0-nightly (082e4ca49 2022-04-26) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C debuginfo=2 -C incremental -C target-cpu=native

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

query stack during panic:
end of query stack
error: aborting due to previous error

Maybe miri could handle these more gracefully, or just bail as rustc does? 🙃