ci: Re-enable ESP-IDF check

Author: taiki-e

.github/workflows/ci.yml

@@ -72,10 +72,6 @@ jobs:
           RUSTFLAGS: ${{ env.RUSTFLAGS }} --cfg polling_test_epoll_pipe
         if: startsWith(matrix.os, 'ubuntu')
       - run: cargo hack build --feature-powerset --no-dev-deps
-      # TODO: broken due to https://github.com/rust-lang/rust/pull/119026.
-      # - name: Check selected Tier 3 targets
-      #   if: startsWith(matrix.rust, 'nightly') && matrix.os == 'ubuntu-latest'
-      #   run: cargo check -Z build-std --target=riscv32imc-esp-espidf
       - name: Clone async-io
         run: git clone https://github.com/smol-rs/async-io.git
         # The async-io Cargo.toml already has a patch section at the bottom, so we
@@ -126,19 +122,22 @@ jobs:
         rustup target add x86_64-unknown-illumos
         cargo build --target x86_64-unknown-illumos
     - name: Redox
-      if: startsWith(matrix.rust, 'nightly') && matrix.os == 'ubuntu-latest'
+      if: startsWith(matrix.rust, 'nightly') && startsWith(matrix.os, 'ubuntu')
       run: |
         rustup target add x86_64-unknown-redox
         cargo check --target x86_64-unknown-redox
     - name: HermitOS
-      if: startsWith(matrix.rust, 'nightly') && matrix.os == 'ubuntu-latest'
+      if: startsWith(matrix.rust, 'nightly') && startsWith(matrix.os, 'ubuntu')
       run: cargo check -Z build-std --target x86_64-unknown-hermit
     - name: Check haiku
-      if: startsWith(matrix.rust, 'nightly') && matrix.os == 'ubuntu-latest'
+      if: startsWith(matrix.rust, 'nightly') && startsWith(matrix.os, 'ubuntu')
       run: cargo check -Z build-std --target x86_64-unknown-haiku
     - name: Check vita
-      if: startsWith(matrix.rust, 'nightly') && matrix.os == 'ubuntu-latest'
+      if: startsWith(matrix.rust, 'nightly') && startsWith(matrix.os, 'ubuntu')
       run: cargo check -Z build-std --target armv7-sony-vita-newlibeabihf
+    - name: Check ESP-IDF
+      if: startsWith(matrix.rust, 'nightly') && startsWith(matrix.os, 'ubuntu')
+      run: cargo check -Z build-std --target riscv32imc-esp-espidf
 
   wine:
     runs-on: ubuntu-22.04