Guard against ALL THE THINGS!

mesonbuild/mesonlib.py

@@ -160,12 +160,15 @@ def version_compare(vstr1, vstr2):
     return cmpop(varr1, varr2)
 
 def default_libdir():
-    pc = subprocess.Popen(['dpkg-architecture', '-qDEB_HOST_MULTIARCH'],
-                          stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
-    (stdo, _) = pc.communicate()
-    if pc.returncode == 0:
-        archpath = stdo.decode().strip()
-        return 'lib/' + archpath
+    try:
+        pc = subprocess.Popen(['dpkg-architecture', '-qDEB_HOST_MULTIARCH'],
+                              stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
+        (stdo, _) = pc.communicate()
+        if pc.returncode == 0:
+            archpath = stdo.decode().strip()
+            return 'lib/' + archpath
+    except Exception:
+        pass
     if os.path.isdir('/usr/lib64'):
         return 'lib64'
     return 'lib'