ObviousNullCheck: exclude constructors

java/java-impl/src/com/intellij/codeInspection/ObviousNullCheckInspection.java

@@ -80,7 +80,7 @@ public class ObviousNullCheckInspection extends AbstractBaseJavaLocalInspectionT
     @Nullable
     static NullCheckParameter fromCall(PsiMethodCallExpression call) {
       PsiMethod method = call.resolveMethod();
-      if (method == null) return null;
+      if (method == null || method.isConstructor()) return null;
       if (!JavaMethodContractUtil.isPure(method)) return null;
       List<? extends MethodContract> contracts = JavaMethodContractUtil.getMethodCallContracts(method, call);
       if (contracts.isEmpty() || contracts.size() > 2) return null;

java/java-tests/testData/inspection/obviousNotNull/ObviousNullCheck.java

@@ -53,4 +53,17 @@ abstract class ObviousNullCheck {
     if(str == null) throw new IllegalArgumentException();
     return str;
   }
+  
+  class X {
+    private String foo;
+    
+    X(String f) {
+      if(f == null) throw new NullPointerException();
+      this.foo = f;
+    }
+    
+    X() {
+      this("");
+    }
+  }
 }