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PY-46592 Use of function parameter marked as possibly used before assignment

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Create DELETE instructions only for unqualified names, as it seems we don't need other ones at the moment.


Merge-request: IJ-MR-159047
Merged-by: Aleksandr Govenko <aleksandr.govenko@jetbrains.com>

(cherry picked from commit e0d9c636c20facf587cb96d8117e6f5f804b847a)

IJ-MR-159047

GitOrigin-RevId: df8a820d13d2cffba0b24db975b30dfce809a678
This commit is contained in:
Aleksandr.Govenko
2025-04-23 22:31:19 +00:00
committed by intellij-monorepo-bot
parent 0e075b98cb
commit b571f8a1a3
2 changed files with 12 additions and 3 deletions
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6
python/python-psi-impl/src/com/jetbrains/python/codeInsight/controlflow/PyControlFlowBuilder.java
View File

@@ -39,8 +39,6 @@ import org.jetbrains.annotations.Nullable;
import java.util.ArrayList;
import java.util.List;
import static com.jetbrains.python.psi.PyUtil.as;
public class PyControlFlowBuilder extends PyRecursiveElementVisitor {
private final ControlFlowBuilder myBuilder = new ControlFlowBuilder();
@@ -219,11 +217,13 @@ public class PyControlFlowBuilder extends PyRecursiveElementVisitor {
myBuilder.startNode(node);
for (PyExpression target : node.getTargets()) {
if (target instanceof PyReferenceExpression expr) {
myBuilder.addNode(ReadWriteInstruction.newInstruction(myBuilder, target, expr.getName(), ReadWriteInstruction.ACCESS.DELETE));
PyExpression qualifier = expr.getQualifier();
if (qualifier != null) {
qualifier.accept(this);
}
else {
myBuilder.addNode(ReadWriteInstruction.newInstruction(myBuilder, target, expr.getName(), ReadWriteInstruction.ACCESS.DELETE));
}
}
else {
target.accept(this);

9
python/testSrc/com/jetbrains/python/inspections/PyUnboundLocalVariableInspectionTest.java
View File

@@ -319,6 +319,15 @@ public class PyUnboundLocalVariableInspectionTest extends PyInspectionTestCase {
"""
);
}
// PY-46592
public void testUseParameterAfterDeletingAttribute() {
doTestByText("""
def func(foo, bar):
del foo.bar
print(bar) # false positive
""");
}
// PY-4537
public void testReferencedAfterDeletion() {