more careful replacement of '$' chars in class names

java/java-impl/src/com/intellij/psi/impl/compiled/ClsStubBuilder.java

@@ -49,9 +49,12 @@ import java.text.StringCharacterIterator;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.regex.Pattern;
 
 @SuppressWarnings({"HardCodedStringLiteral"})
 public class ClsStubBuilder {
+  private static final Pattern REGEX_PATTERN = Pattern.compile("(?<=[^\\$])\\${1}(?=[^\\$])");
+
   private ClsStubBuilder() {
   }
 
@@ -677,6 +680,12 @@ public class ClsStubBuilder {
 
   private static String getTypeText(final Type type) {
     final String raw = type.getClassName();
-    return raw.replace('$', '.');
+    // As the '$' char is a valid java identifier and is actively used by bytecode genarators, the problem is
+    // which occurrences of this char should be replaced and which should not.
+    // Heuristic: replace only those $ occurrences that are surrounded non-"$" chars
+    //   (most likely generated by javac to separate inner or anonymoys class name)
+    //   Leading and trailing $ chars should be left unchanged.
+    return raw.contains("$")? REGEX_PATTERN.matcher(raw).replaceAll("\\.") : raw;
   }
+
 }