interpreter: Fix missing featuer check (fixes #9425)

4 files changed, 24 insertions, 0 deletions

diff --git a/mesonbuild/interpreter/primitives/array.py b/mesonbuild/interpreter/primitives/array.py
index 566dff9..f2f458d 100644
--- a/mesonbuild/interpreter/primitives/array.py
+++ b/mesonbuild/interpreter/primitives/array.py
@@ -12,12 +12,14 @@ from ...interpreterbase import (
     noPosargs,
     noArgsFlattening,
     typed_pos_args,
+    FeatureNew,
 
     TYPE_var,
     TYPE_kwargs,
 
     InvalidArguments,
 )
+from ...mparser import PlusAssignmentNode
 
 if T.TYPE_CHECKING:
     # Object holders need the actual interpreter
@@ -92,6 +94,8 @@ class ArrayHolder(ObjectHolder[T.List[TYPE_var]], IterableObject):
     @typed_operator(MesonOperator.PLUS, object)
     def op_plus(self, other: TYPE_var) -> T.List[TYPE_var]:
         if not isinstance(other, list):
+            if not isinstance(self.current_node, PlusAssignmentNode):
+                FeatureNew.single_use('list.<plus>', '0.60.0', self.subproject, 'The right hand operand was not a list.')
             other = [other]
         return self.held_object + other
 
diff --git a/mesonbuild/interpreterbase/interpreterbase.py b/mesonbuild/interpreterbase/interpreterbase.py
index bc21951..555db3c 100644
--- a/mesonbuild/interpreterbase/interpreterbase.py
+++ b/mesonbuild/interpreterbase/interpreterbase.py
@@ -303,6 +303,7 @@ class InterpreterBase:
         if operator in (MesonOperator.IN, MesonOperator.NOT_IN):
             val1, val2 = val2, val1
 
+        val1.current_node = node
         return self._holderify(val1.operator_call(operator, _unholder(val2)))
 
     def evaluate_andstatement(self, cur: mparser.AndNode) -> InterpreterObject:
@@ -333,6 +334,7 @@ class InterpreterBase:
         v = self.evaluate_statement(cur.value)
         if isinstance(v, Disabler):
             return v
+        v.current_node = cur
         return self._holderify(v.operator_call(MesonOperator.UMINUS, None))
 
     def evaluate_arithmeticstatement(self, cur: mparser.ArithmeticNode) -> InterpreterObject:
@@ -350,6 +352,7 @@ class InterpreterBase:
             'div': MesonOperator.DIV,
             'mod': MesonOperator.MOD,
         }
+        l.current_node = cur
         res = l.operator_call(mapping[cur.operation], _unholder(r))
         return self._holderify(res)
 
@@ -358,6 +361,7 @@ class InterpreterBase:
         result = self.evaluate_statement(node.condition)
         if isinstance(result, Disabler):
             return result
+        result.current_node = node
         result_bool = result.operator_call(MesonOperator.BOOL, None)
         if result_bool:
             return self.evaluate_statement(node.trueblock)
@@ -420,6 +424,7 @@ class InterpreterBase:
         # Remember that all variables are immutable. We must always create a
         # full new variable and then assign it.
         old_variable = self.get_variable(varname)
+        old_variable.current_node = node
         new_value = self._holderify(old_variable.operator_call(MesonOperator.PLUS, _unholder(addition)))
         self.set_variable(varname, new_value)
 
@@ -432,6 +437,7 @@ class InterpreterBase:
 
         if iobject is None:
             raise InterpreterException('Tried to evaluate indexing on None')
+        iobject.current_node = node
         return self._holderify(iobject.operator_call(MesonOperator.INDEX, index))
 
     def function_call(self, node: mparser.FunctionNode) -> T.Optional[InterpreterObject]:
diff --git a/test cases/warning/6 list add/meson.build b/test cases/warning/6 list add/meson.build
new file mode 100644
index 0000000..94b7eab
--- /dev/null
+++ b/test cases/warning/6 list add/meson.build
@@ -0,0 +1,7 @@
+project('test list add', meson_version: '>=0.59.0')
+
+l1 = [1, 2, 3]
+l2 = l1 + 4
+l2 += 5
+
+message(l2)
diff --git a/test cases/warning/6 list add/test.json b/test cases/warning/6 list add/test.json
new file mode 100644
index 0000000..35c4567
--- /dev/null
+++ b/test cases/warning/6 list add/test.json
@@ -0,0 +1,7 @@
+{
+  "stdout": [
+    {
+      "line": "WARNING: Project targeting '>=0.59.0' but tried to use feature introduced in '0.60.0': list.<plus>. The right hand operand was not a list."
+    }
+  ]
+}