ICE WASM toolchain not installed. But it is installed

[tifrel]

Code

I am currently experiencing issues when compiling to wasm and have included the commands to reproduce. Due to time limitations, I can currently not narrow it down any further. However I can use nightly-2021-09-17, which fixes the issues for me. Hopefully this can help you find the error:

$ git clone https://github.com/paritytech/substrate
$ cd substrate/primitives/runtime-interface/test-wasm
$ RUST_BACKTRACE=1 cargo build
   Compiling sp-runtime-interface-test-wasm v2.0.0 (/Users/tf/sandbox/substrate/primitives/runtime-interface/test-wasm)
error: failed to run custom build command for `sp-runtime-interface-test-wasm v2.0.0 (/Users/tf/sandbox/substrate/primitives/runtime-interface/test-wasm)`

Caused by:
  process didn't exit successfully: `/Users/tf/sandbox/substrate/target/debug/build/sp-runtime-interface-test-wasm-7a998eaa5eac0220/build-script-build` (exit status: 1)
  --- stderr
  Rust WASM toolchain not installed, please install it!

  Further error information:
  ------------------------------------------------------------
     Compiling wasm-test v1.0.0 (/var/folders/bq/bjccsvc10617dsh30gbv9mm00000gn/T/.tmpTljFvc)
  thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: "Provided allocation has wrong size for slot count 131072"', compiler/rustc_metadata/src/rmeta/decoder.rs:263:29
  stack backtrace:
     0: _rust_begin_unwind
     1: core::panicking::panic_fmt
     2: core::result::unwrap_failed
     3: rustc_metadata::rmeta::decoder::CrateMetadata::new
     4: rustc_metadata::creader::CrateLoader::maybe_resolve_crate
     5: rustc_metadata::creader::CrateLoader::maybe_resolve_crate
     6: rustc_metadata::creader::CrateLoader::process_extern_crate
     7: <rustc_resolve::build_reduced_graph::BuildReducedGraphVisitor as rustc_ast::visit::Visitor>::visit_item
     8: rustc_ast::visit::walk_item
     9: <rustc_resolve::build_reduced_graph::BuildReducedGraphVisitor as rustc_ast::visit::Visitor>::visit_item
    10: rustc_expand::expand::AstFragment::visit_with
    11: rustc_resolve::macros::<impl rustc_expand::base::ResolverExpand for rustc_resolve::Resolver>::visit_ast_fragment_with_placeholders
    12: rustc_expand::expand::MacroExpander::collect_invocations
    13: rustc_expand::expand::MacroExpander::fully_expand_fragment
    14: rustc_expand::expand::MacroExpander::expand_crate
    15: rustc_session::utils::<impl rustc_session::session::Session>::time
    16: rustc_interface::passes::configure_and_expand
    17: rustc_interface::queries::Queries::expansion
    18: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
    19: rustc_span::with_source_map
    20: scoped_tls::ScopedKey<T>::set
  note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

  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 1.57.0-nightly (aa8f2d432 2021-09-18) running on aarch64-apple-darwin

  note: compiler flags: -C embed-bitcode=no -C split-debuginfo=unpacked -C debuginfo=2 -C incremental --crate-type bin

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

  query stack during panic:
  end of query stack
  error: could not compile `wasm-test`
  ------------------------------------------------------------

Note that (as shown below) I have the wasm target installed for both the stable and the nightly toolchain, which cargo claims is not the case.

Meta

$ rustup show
Default host: aarch64-apple-darwin
rustup home:  /Users/tf/.rustup

installed toolchains
--------------------

stable-aarch64-apple-darwin (default)
stable-x86_64-apple-darwin
nightly-aarch64-apple-darwin

installed targets for active toolchain
--------------------------------------

aarch64-apple-darwin
wasm32-unknown-unknown

active toolchain
----------------

stable-aarch64-apple-darwin (default)
rustc 1.55.0 (c8dfcfe04 2021-09-06)

$ rustup +nightly show
# ---- skipped ----

installed targets for active toolchain
--------------------------------------

aarch64-apple-darwin
wasm32-unknown-unknown

active toolchain
----------------

nightly-aarch64-apple-darwin (overridden by +toolchain on the command line)
rustc 1.57.0-nightly (aa8f2d432 2021-09-18)

Error output

See above.

Backtrace

     Compiling wasm-test v1.0.0 (/var/folders/bq/bjccsvc10617dsh30gbv9mm00000gn/T/.tmpTljFvc)
  thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: "Provided allocation has wrong size for slot count 131072"', compiler/rustc_metadata/src/rmeta/decoder.rs:263:29
  stack backtrace:
     0: _rust_begin_unwind
     1: core::panicking::panic_fmt
     2: core::result::unwrap_failed
     3: rustc_metadata::rmeta::decoder::CrateMetadata::new
     4: rustc_metadata::creader::CrateLoader::maybe_resolve_crate
     5: rustc_metadata::creader::CrateLoader::maybe_resolve_crate
     6: rustc_metadata::creader::CrateLoader::process_extern_crate
     7: <rustc_resolve::build_reduced_graph::BuildReducedGraphVisitor as rustc_ast::visit::Visitor>::visit_item
     8: rustc_ast::visit::walk_item
     9: <rustc_resolve::build_reduced_graph::BuildReducedGraphVisitor as rustc_ast::visit::Visitor>::visit_item
    10: rustc_expand::expand::AstFragment::visit_with
    11: rustc_resolve::macros::<impl rustc_expand::base::ResolverExpand for rustc_resolve::Resolver>::visit_ast_fragment_with_placeholders
    12: rustc_expand::expand::MacroExpander::collect_invocations
    13: rustc_expand::expand::MacroExpander::fully_expand_fragment
    14: rustc_expand::expand::MacroExpander::expand_crate
    15: rustc_session::utils::<impl rustc_session::session::Session>::time
    16: rustc_interface::passes::configure_and_expand
    17: rustc_interface::queries::Queries::expansion
    18: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
    19: rustc_span::with_source_map
    20: scoped_tls::ScopedKey<T>::set

[Aaron1011]

This is a duplicate of #89085 - a recent incremental compilation change appears to have broken the host compiler for aarch64-apple-darwin
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