[groovy] do not try to infer rValue within index property assignment (EA-58298)

plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/resolve/processors/SubstitutorComputer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2015 JetBrains s.r.o.
+ * Copyright 2000-2016 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -33,6 +33,7 @@ import org.jetbrains.plugins.groovy.lang.psi.api.statements.branch.GrReturnState
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.branch.GrThrowStatement;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrAssignmentExpression;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.path.GrIndexProperty;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.GrTypeDefinitionBody;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.members.GrGdkMethod;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.members.GrMethod;
@@ -95,7 +96,13 @@ public class SubstitutorComputer {
       }
     }
     else if (parent instanceof GrAssignmentExpression && myPlaceToInferContext.equals(((GrAssignmentExpression)parent).getRValue())) {
-      return ((GrAssignmentExpression)parent).getLValue().getType();
+      GrExpression lValue = ((GrAssignmentExpression)parent).getLValue();
+      if (lValue instanceof GrIndexProperty) {
+        return null;
+      }
+      else {
+        return lValue.getType();
+      }
     }
     else if (parent instanceof GrVariable) {
       return ((GrVariable)parent).getDeclaredType();

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/highlighting/GroovyHighlightingTest.groovy

@@ -1969,6 +1969,24 @@ import groovy.transform.Field
 
 @Field
 def (,<error descr="Identifier expected">)</error>
+'''
+  }
+
+  void 'test no SOE in index property assignment with generic function'() {
+    testHighlighting '''
+class Main {
+
+    static <T> T foo() {}
+
+    static void main(String[] args) {
+        def main = new Main()
+        main[Main] = foo()
+    }
+
+    def putAt(x, String t) {
+        println "Works: $x = $t"
+    }
+}
 '''
   }
 }