fix windows please

Author: ciaranra

.github/workflows/python-test.yml

@@ -116,6 +116,9 @@ jobs:
         # Also ensure LLVM bin is in PATH
         $llvmBinDir = Join-Path -Path $env:LLVM_SYS_140_PREFIX -ChildPath "bin"
         if (Test-Path $llvmBinDir) {
+          # Update PATH for current session (so pytest can find llvm-as)
+          $env:PATH = "$llvmBinDir;$env:PATH"
+          # Update PATH for future steps
           "$llvmBinDir" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
           Write-Host "Added LLVM bin to PATH: $llvmBinDir"
         }

python/quantum-pecos/tests/guppy/test_hugr_compilation.py

@@ -128,12 +128,15 @@ def test_llvm_ir_format_validation(self) -> None:
         try:
             # Find llvm-as - check PATH first, then use pecos-llvm-utils
             llvm_as_path = shutil.which("llvm-as")
+            print(f"DEBUG: llvm-as in PATH: {llvm_as_path}")
 
             if not llvm_as_path:
                 # Use pecos-llvm-utils to find the tool
                 cargo_path = shutil.which("cargo")
+                print(f"DEBUG: cargo found at: {cargo_path}")
                 if cargo_path:
                     try:
+                        print("DEBUG: Running cargo to find llvm-as...")
                         result = subprocess.run(
                             [
                                 cargo_path,
@@ -151,13 +154,20 @@ def test_llvm_ir_format_validation(self) -> None:
                             capture_output=True,
                             text=True,
                             check=False,
-                            timeout=30,
+                            timeout=120,  # Increased from 30s to account for compilation time on CI
                         )
+                        print(f"DEBUG: cargo returncode: {result.returncode}")
+                        print(f"DEBUG: cargo stdout: {result.stdout[:200]}")
+                        print(f"DEBUG: cargo stderr: {result.stderr[:200]}")
                         if result.returncode == 0 and result.stdout.strip():
                             llvm_as_path = result.stdout.strip()
-                    except (subprocess.TimeoutExpired, Exception):  # noqa: S110
-                        # Silently fall through to failure case - error will be reported below
-                        pass
+                            print(f"DEBUG: llvm-as found at: {llvm_as_path}")
+                    except subprocess.TimeoutExpired as e:
+                        print(f"DEBUG: cargo command timed out after {e.timeout}s")
+                    except Exception as e:
+                        print(f"DEBUG: cargo command failed with exception: {e}")
+                else:
+                    print("DEBUG: cargo not found in PATH")
 
             if llvm_as_path:
                 # Validate with llvm-as