Saving and loading projection kind of array element type in bytecode.

runtime/src/org/jetbrains/jet/rt/signature/JetSignatureAdapter.java

@@ -75,7 +75,7 @@ public class JetSignatureAdapter implements JetSignatureVisitor {
     }
 
     @Override
-    public JetSignatureVisitor visitArrayType(boolean nullable) {
+    public JetSignatureVisitor visitArrayType(boolean nullable, JetSignatureVariance wildcard) {
         return this;
     }
 

runtime/src/org/jetbrains/jet/rt/signature/JetSignatureExceptionsAdapter.java

@@ -78,7 +78,7 @@ public class JetSignatureExceptionsAdapter implements JetSignatureVisitor {
     }
 
     @Override
-    public JetSignatureVisitor visitArrayType(boolean nullable) {
+    public JetSignatureVisitor visitArrayType(boolean nullable, JetSignatureVariance wildcard) {
         throw new IllegalStateException();
     }
 

runtime/src/org/jetbrains/jet/rt/signature/JetSignatureReader.java

@@ -172,7 +172,13 @@ public class JetSignatureReader {
                 return pos;
 
             case '[':
-                return parseType(signature, pos, v.visitArrayType(nullable));
+                switch (c = signature.charAt(pos)) {
+                    case '+':
+                    case '-':
+                        return parseType(signature, pos + 1, v.visitArrayType(nullable, JetSignatureVariance.parseVariance(c)));
+                    default:
+                        return parseType(signature, pos, v.visitArrayType(nullable, JetSignatureVariance.INVARIANT));
+                }
 
             case 'T':
                 end = signature.indexOf(';', pos);

runtime/src/org/jetbrains/jet/rt/signature/JetSignatureVisitor.java

@@ -123,7 +123,7 @@ public interface JetSignatureVisitor {
      * @return a non null visitor to visit the signature of the array element
      *         type.
      */
-    JetSignatureVisitor visitArrayType(boolean nullable);
+    JetSignatureVisitor visitArrayType(boolean nullable, JetSignatureVariance wildcard);
 
     /**
      * Starts the visit of a signature corresponding to a class or interface

runtime/src/org/jetbrains/jet/rt/signature/JetSignatureWriter.java

@@ -157,9 +157,12 @@ public class JetSignatureWriter implements JetSignatureVisitor {
     }
 
     @Override
-    public JetSignatureWriter visitArrayType(boolean nullable) {
+    public JetSignatureWriter visitArrayType(boolean nullable, JetSignatureVariance wildcard) {
         visitNullabe(nullable);
         buf.append('[');
+        if (wildcard != JetSignatureVariance.INVARIANT) {
+            buf.append(wildcard.getC());
+        }
         return this;
     }
 
@@ -195,7 +198,7 @@ public class JetSignatureWriter implements JetSignatureVisitor {
             ++argumentStack;
             buf.append('<');
         }
-        if (variance.getC() != '=') {
+        if (variance != JetSignatureVariance.INVARIANT) {
             buf.append(variance.getC());
         }
         return this;