[groovy] check name before trying to resolve LHS of assignment

plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/psi/impl/statements/expressions/GrAssignmentExpressionImpl.java

@@ -130,9 +130,9 @@ public class GrAssignmentExpressionImpl extends GrOperatorExpressionImpl impleme
                                        @NotNull GroovyFileImpl file,
                                        @NotNull GrExpression lValue) {
     if (!(lValue instanceof GrReferenceExpression)) return true;
+
     final GrReferenceExpression lReference = (GrReferenceExpression)lValue;
     if (lReference.isQualified()) return true;
-    if (lReference != place && lReference.resolve() != null && !(lReference.resolve() instanceof GrBindingVariable)) return true;
 
     final String name = lReference.getReferenceName();
     if (name == null) return true;
@@ -140,6 +140,7 @@ public class GrAssignmentExpressionImpl extends GrOperatorExpressionImpl impleme
     String hintName = ResolveUtil.getNameHint(processor);
     if (hintName != null && !name.equals(hintName)) return true;
 
+    if (lReference != place && lReference.resolve() != null && !(lReference.resolve() instanceof GrBindingVariable)) return true;
     final ConcurrentMap<String, GrBindingVariable> bindings = file.getBindings();
     GrBindingVariable variable = bindings.get(name);
     if (variable == null) {

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/GroovyStressPerformanceTest.groovy

@@ -33,8 +33,10 @@ import org.jetbrains.plugins.groovy.codeInspection.unusedDef.UnusedDefInspection
 import org.jetbrains.plugins.groovy.dsl.GroovyDslFileIndex
 import org.jetbrains.plugins.groovy.lang.psi.GrReferenceElement
 import org.jetbrains.plugins.groovy.lang.psi.GroovyFile
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.members.GrMethod
 import org.jetbrains.plugins.groovy.lang.psi.impl.GroovyPsiManager
+import org.jetbrains.plugins.groovy.lang.psi.impl.synthetic.GrBindingVariable
 import org.jetbrains.plugins.groovy.util.Slow
 import org.jetbrains.plugins.groovy.util.TestUtils
 
@@ -548,4 +550,16 @@ def a = new Node()
       assert reference.resolve() != null
     }
   }
+
+  void "test do not resolve LHS and RHS of assignment when name doesn't match"() {
+    def text = new StringBuilder("a0 = 1\n")
+    def n = 1000
+    for (i in 1..n) {
+      text.append "a$i = a${i - 1}\n"
+    }
+    text.append "a$n"
+    def file = (GroovyFile)fixture.configureByText('_.groovy', text.toString())
+    def last = (GrReferenceExpression)file.statements.last()
+    assert last.resolve() instanceof GrBindingVariable
+  }
 }