ci: compare rustc version, CARGO_HOME, PWD between build and test

Author: xdustinface

.github/workflows/build-and-test.yml

@@ -30,17 +30,18 @@ jobs:
           cache-all-crates: true
       - name: Debug cache state (before build)
         run: |
-          echo "=== target/ directory ==="
-          ls -la target/ 2>/dev/null | head -20 || echo "No target dir"
+          echo "=== RUSTC VERSION ==="
+          rustc --version
+          rustc --version --verbose | grep host
+          echo "=== CARGO_HOME ==="
+          echo $CARGO_HOME
+          echo "=== PWD ==="
+          pwd
           echo "=== fingerprint count ==="
           ls target/debug/.fingerprint/ 2>/dev/null | wc -l || echo "No fingerprints"
           echo "=== COMPILED ARTIFACTS (deps/) ==="
           ls target/debug/deps/ 2>/dev/null | wc -l || echo "No deps dir"
           ls target/debug/deps/libmemchr* 2>/dev/null || echo "No memchr artifacts"
-          echo "=== registry/src ==="
-          ls ~/.cargo/registry/src/ 2>/dev/null | head -5 || echo "No registry src"
-          echo "=== memchr source file timestamp ==="
-          ls -la ~/.cargo/registry/src/*/memchr-*/src/lib.rs 2>/dev/null || echo "No memchr src"
         shell: bash
       - name: Build workspace
         run: cargo test --workspace --all-features --no-run ${{ inputs.exclude-crates && format('--exclude {0}', inputs.exclude-crates) || '' }}
@@ -75,17 +76,18 @@ jobs:
           cache-all-crates: true
       - name: Debug cache state (after cache restore)
         run: |
-          echo "=== target/ directory ==="
-          ls -la target/ 2>/dev/null | head -20 || echo "No target dir"
+          echo "=== RUSTC VERSION ==="
+          rustc --version
+          rustc --version --verbose | grep host
+          echo "=== CARGO_HOME ==="
+          echo $CARGO_HOME
+          echo "=== PWD ==="
+          pwd
           echo "=== fingerprint count ==="
           ls target/debug/.fingerprint/ 2>/dev/null | wc -l || echo "No fingerprints"
           echo "=== COMPILED ARTIFACTS (deps/) ==="
           ls target/debug/deps/ 2>/dev/null | wc -l || echo "No deps dir"
           ls target/debug/deps/libmemchr* 2>/dev/null || echo "No memchr artifacts"
-          echo "=== registry/src ==="
-          ls ~/.cargo/registry/src/ 2>/dev/null | head -5 || echo "No registry src"
-          echo "=== memchr source file timestamp ==="
-          ls -la ~/.cargo/registry/src/*/memchr-*/src/lib.rs 2>/dev/null || echo "No memchr src"
         shell: bash
       - uses: actions/setup-python@v5
         with: