don't infer purity for constructors

java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/PurityInference.java

@@ -34,7 +34,7 @@ import java.util.List;
 public class PurityInference {
 
   public static boolean inferPurity(@NotNull final PsiMethod method) {
-    if (method instanceof PsiCompiledElement || method.getReturnType() == PsiType.VOID || method.getBody() == null) {
+    if (method instanceof PsiCompiledElement || method.getReturnType() == PsiType.VOID || method.getBody() == null || method.isConstructor()) {
       return false;
     }
 

java/java-tests/testSrc/com/intellij/codeInspection/PurityInferenceFromSourceTest.groovy

@@ -129,6 +129,13 @@ int smthPure() { return 3; }
 """
   }
 
+  public void "test don't analyze constructors"() {
+    assertPure false, """
+public Foo() {
+}
+"""
+  }
+
   private void assertPure(boolean expected, String classBody) {
     def clazz = myFixture.addClass("final class Foo { $classBody }")
     assert expected == PurityInference.inferPurity(clazz.methods[0])