ice: `Mismatched open/close delims`

[matthiaskrgr]

File: /tmp/im/4E62E62441812AD57206CF6AE50F4E62991CAC86A8E1D805B18CC629F7D6C5AA.rs

auto-reduced (treereduce-rust):

macro_rules! make_struct {
    ($name:ident) => {
        #[derive(Debug)]
        struct Foo {
            #[cfg]
            field: fn(T::B($id1), T::B($id2)),
        }
    };
}

make_struct!(param_name);

original:

// check-pass

macro_rules! make_struct {
    ($name:ident) => {
        #[derive(Debug)]
        struct Foo {
            #[cfg(not(FALSE))]
            field: fn(T::B($id1), T::B($id2))
        }
    }
}

make_struct!(param_name);

fn main() {}

Version information

rustc 1.75.0-nightly (64368d027 2023-10-15)
binary: rustc
commit-hash: 64368d0279c41699fffd7980304488d65a42ba32
commit-date: 2023-10-15
host: x86_64-unknown-linux-gnu
release: 1.75.0-nightly
LLVM version: 17.0.2

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

error: expected pattern, found `$`
  --> /tmp/im/4E62E62441812AD57206CF6AE50F4E62991CAC86A8E1D805B18CC629F7D6C5AA.rs:8:28
   |
8  |             field: fn(T::B($id1), T::B($id2))
   |                            ^^^^ expected pattern
...
13 | make_struct!(param_name);
   | ------------------------ in this macro invocation
   |
   = note: this error originates in the macro `make_struct` (in Nightly builds, run with -Z macro-backtrace for more info)

error: expected `:`, found `::`
  --> /tmp/im/4E62E62441812AD57206CF6AE50F4E62991CAC86A8E1D805B18CC629F7D6C5AA.rs:8:36
   |
6  |         struct Foo {
   |                --- while parsing this struct
7  |             #[cfg(not(FALSE))]
8  |             field: fn(T::B($id1), T::B($id2))
   |                                    ^^ expected `:`
...
13 | make_struct!(param_name);
   | ------------------------ in this macro invocation
   |
   = note: this error originates in the macro `make_struct` (in Nightly builds, run with -Z macro-backtrace for more info)

thread 'rustc' panicked at compiler/rustc_parse/src/parser/attr_wrapper.rs:409:17:
assertion `left == right` failed: Mismatched open/close delims: open=Brace close=/tmp/im/4E62E62441812AD57206CF6AE50F4E62991CAC86A8E1D805B18CC629F7D6C5AA.rs:8:45: 8:46 (#4)
  left: Brace
 right: Parenthesis
stack backtrace:
   0:     0x7ffbcab628ec - std::backtrace_rs::backtrace::libunwind::trace::h07ab3bc21cf862ce
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7ffbcab628ec - std::backtrace_rs::backtrace::trace_unsynchronized::h5ca72d50ab1b2eeb
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7ffbcab628ec - std::sys_common::backtrace::_print_fmt::hb9f77b89692d6d73
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7ffbcab628ec - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h48fe59c0b4f194df
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7ffbcabca370 - core::fmt::rt::Argument::fmt::h576d5accdc6c04cd
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/core/src/fmt/rt.rs:142:9
   5:     0x7ffbcabca370 - core::fmt::write::h8fce9012b8f77a61
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/core/src/fmt/mod.rs:1117:17
   6:     0x7ffbcab55baf - std::io::Write::write_fmt::he75f9b8a4bb09750
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/io/mod.rs:1762:15
   7:     0x7ffbcab626d4 - std::sys_common::backtrace::_print::h5888ddb340763531
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7ffbcab626d4 - std::sys_common::backtrace::print::hd04b6456bfa7442a
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7ffbcab65507 - std::panicking::default_hook::{{closure}}::hf663a73e245092af
  10:     0x7ffbcab6524a - std::panicking::default_hook::ha6afd4cd28754d7b
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/panicking.rs:292:9
  11:     0x7ffbcd718bda - std[41c1d254b4d8ee37]::panicking::update_hook::<alloc[df3d2ae1c63c0059]::boxed::Box<rustc_driver_impl[fdf22ace854e8ad3]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7ffbcab65ca8 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h829c11900fb8a8ac
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/alloc/src/boxed.rs:2021:9
  13:     0x7ffbcab65ca8 - std::panicking::rust_panic_with_hook::hc84ea4df24f6431b
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/panicking.rs:735:13
  14:     0x7ffbcab65a01 - std::panicking::begin_panic_handler::{{closure}}::h45a88c37641f7e07
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/panicking.rs:609:13
  15:     0x7ffbcab62e06 - std::sys_common::backtrace::__rust_end_short_backtrace::hf5a9ccc085289d9e
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/sys_common/backtrace.rs:170:18
  16:     0x7ffbcab65732 - rust_begin_unwind
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/panicking.rs:597:5
  17:     0x7ffbcabc6995 - core::panicking::panic_fmt::hfd410b1fd7beeb74
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/core/src/panicking.rs:72:14
  18:     0x7ffbcabc6ff1 - core::panicking::assert_failed_inner::h167cf81470035446
  19:     0x7ffbcdd51f77 - core[a979f648d5a1b559]::panicking::assert_failed::<rustc_ast[cc6975eba0fb785]::token::Delimiter, rustc_ast[cc6975eba0fb785]::token::Delimiter>
  20:     0x7ffbcf06f4c5 - <rustc_parse[5d7049d4dc4888fb]::parser::attr_wrapper::LazyAttrTokenStreamImpl as rustc_ast[cc6975eba0fb785]::tokenstream::ToAttrTokenStream>::to_attr_token_stream
  21:     0x7ffbcf502905 - <rustc_builtin_macros[6b4e0a7826f98660]::cfg_eval::CfgEval as rustc_ast[cc6975eba0fb785]::mut_visit::MutVisitor>::flat_map_item
  22:     0x7ffbcf38dce6 - rustc_builtin_macros[6b4e0a7826f98660]::cfg_eval::cfg_eval
  23:     0x7ffbcf38f47d - <rustc_builtin_macros[6b4e0a7826f98660]::derive::Expander as rustc_expand[41330b176b000abf]::base::MultiItemModifier>::expand::{closure#0}
  24:     0x7ffbceff4270 - <rustc_resolve[e104bfe13d185273]::Resolver as rustc_expand[41330b176b000abf]::base::ResolverExpand>::resolve_derives
  25:     0x7ffbceff3f52 - <rustc_builtin_macros[6b4e0a7826f98660]::derive::Expander as rustc_expand[41330b176b000abf]::base::MultiItemModifier>::expand
  26:     0x7ffbcf1abf4d - <rustc_expand[41330b176b000abf]::expand::MacroExpander>::fully_expand_fragment
  27:     0x7ffbcf1aa56e - <rustc_expand[41330b176b000abf]::expand::MacroExpander>::expand_crate
  28:     0x7ffbcf683ce4 - rustc_interface[f7706cd485e32c9a]::passes::resolver_for_lowering
  29:     0x7ffbcf68316b - rustc_query_impl[98cff80e9247e0c0]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[98cff80e9247e0c0]::query_impl::resolver_for_lowering::dynamic_query::{closure#2}::{closure#0}, rustc_middle[b6d0bd77387cd2da]::query::erase::Erased<[u8; 8usize]>>
  30:     0x7ffbcf4abfb3 - rustc_query_system[41316a175d5feef2]::query::plumbing::try_execute_query::<rustc_query_impl[98cff80e9247e0c0]::DynamicConfig<rustc_query_system[41316a175d5feef2]::query::caches::SingleCache<rustc_middle[b6d0bd77387cd2da]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[98cff80e9247e0c0]::plumbing::QueryCtxt, false>
  31:     0x7ffbcf4ab649 - rustc_query_impl[98cff80e9247e0c0]::query_impl::resolver_for_lowering::get_query_non_incr::__rust_end_short_backtrace
  32:     0x7ffbcf4b0d48 - std[41c1d254b4d8ee37]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[f7706cd485e32c9a]::util::run_in_thread_with_globals<rustc_interface[f7706cd485e32c9a]::interface::run_compiler<core[a979f648d5a1b559]::result::Result<(), rustc_span[4150561a1ad8cade]::ErrorGuaranteed>, rustc_driver_impl[fdf22ace854e8ad3]::run_compiler::{closure#1}>::{closure#0}, core[a979f648d5a1b559]::result::Result<(), rustc_span[4150561a1ad8cade]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[a979f648d5a1b559]::result::Result<(), rustc_span[4150561a1ad8cade]::ErrorGuaranteed>>
  33:     0x7ffbcf4b0233 - <<std[41c1d254b4d8ee37]::thread::Builder>::spawn_unchecked_<rustc_interface[f7706cd485e32c9a]::util::run_in_thread_with_globals<rustc_interface[f7706cd485e32c9a]::interface::run_compiler<core[a979f648d5a1b559]::result::Result<(), rustc_span[4150561a1ad8cade]::ErrorGuaranteed>, rustc_driver_impl[fdf22ace854e8ad3]::run_compiler::{closure#1}>::{closure#0}, core[a979f648d5a1b559]::result::Result<(), rustc_span[4150561a1ad8cade]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[a979f648d5a1b559]::result::Result<(), rustc_span[4150561a1ad8cade]::ErrorGuaranteed>>::{closure#1} as core[a979f648d5a1b559]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  34:     0x7ffbcab70c25 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h36be55b332499764
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/alloc/src/boxed.rs:2007:9
  35:     0x7ffbcab70c25 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h82dea3e1c390a3bb
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/alloc/src/boxed.rs:2007:9
  36:     0x7ffbcab70c25 - std::sys::unix::thread::Thread::new::thread_start::h9fb84af69b7425e4
                               at /rustc/64368d0279c41699fffd7980304488d65a42ba32/library/std/src/sys/unix/thread.rs:108:17
  37:     0x7ffbca9139eb - <unknown>
  38:     0x7ffbca9977cc - <unknown>
  39:                0x0 - <unknown>

error: 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 1.75.0-nightly (64368d027 2023-10-15) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [resolver_for_lowering] getting the resolver for lowering
end of query stack
error: aborting due to 2 previous errors

[matthiaskrgr]

Regression in nightly-2021-04-12
finding bors merge commits
found 9 bors merge commits in the specified range
commit[0] 2021-04-10: Auto merge of #84016 - Aaron1011:new-preexp-tests, r=petrochenkov
commit[1] 2021-04-10: Auto merge of #84023 - Aaron1011:derive-invoc-order, r=petrochenkov
commit[2] 2021-04-11: Auto merge of #84053 - RalfJung:liballoc-miri, r=Manishearth
commit[3] 2021-04-11: Auto merge of #84071 - nagisa:nixos-patching-fix, r=Mark-Simulacrum
commit[4] 2021-04-11: Auto merge of #83806 - JohnTitor:issue-51446, r=estebank
commit[5] 2021-04-11: Auto merge of #82608 - Aaron1011:feature/final-preexp-tts, r=petrochenkov
commit[6] 2021-04-11: Auto merge of #84063 - LingMan:patch-1, r=nagisa
commit[7] 2021-04-11: Auto merge of #81469 - tweksteen:android_set_message, r=m-ou-se
commit[8] 2021-04-11: Auto merge of #83482 - hyd-dev:uwtable, r=nagisa

[mu001999]

@rustbot claim

[mu001999]

Reduced reproduction:

#[derive(Debug)]
struct Foo {
    #[cfg(all())]
    field: fn(($), $),
}

[mu001999]

@rustbot claim