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-rw-r--r--mesonbuild/coredata.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/mesonbuild/coredata.py b/mesonbuild/coredata.py
index cf7df5e..d4a91a7 100644
--- a/mesonbuild/coredata.py
+++ b/mesonbuild/coredata.py
@@ -13,6 +13,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
+from . import mlog
import pickle, os, uuid
import sys
from pathlib import PurePath
@@ -148,6 +149,9 @@ class UserArrayOption(UserOption):
newvalue = ast.literal_eval(value)
else:
newvalue = [v.strip() for v in value.split(',')]
+ if len(set(newvalue)) != len(newvalue):
+ mlog.log(mlog.red('DEPRECATION:'), '''Duplicated values in an array type is deprecated.
+This will become a hard error in the future.''')
if not isinstance(newvalue, list):
raise MesonException('"{0}" should be a string array, but it is not'.format(str(newvalue)))
for i in newvalue: