fix another instance of a potential `null' frame

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/PythonCextBuiltins.java

@@ -355,8 +355,15 @@ Object doI(String typeName) {
     abstract static class PyTuple_New extends PythonUnaryBuiltinNode {
         @Specialization(limit = "getCallSiteInlineCacheMaxDepth()")
         PTuple doGeneric(VirtualFrame frame, Object size,
+                        @Cached("createBinaryProfile()") ConditionProfile gotFrame,
                         @CachedLibrary("size") PythonObjectLibrary lib) {
-            return factory().createTuple(new Object[lib.asIndexWithState(size, PArguments.getThreadState(frame))]);
+            int index;
+            if (gotFrame.profile(frame != null)) {
+                index = lib.asIndexWithState(size, PArguments.getThreadState(frame));
+            } else {
+                index = lib.asIndex(size);
+            }
+            return factory().createTuple(new Object[index]);
         }
     }
 

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/common/SequenceStorageNodes.java

@@ -491,8 +491,8 @@ protected final int normalizeIndex(@SuppressWarnings("unused") VirtualFrame fram
             return idx;
         }
 
-        protected final int normalizeIndex(VirtualFrame frame, long idx, SequenceStorage store) {
-            int intIdx = getLibrary().asIndexWithState(idx, PArguments.getThreadState(frame));
+        protected final int normalizeIndex(@SuppressWarnings("unused") VirtualFrame frame, long idx, SequenceStorage store) {
+            int intIdx = getLibrary().asIndex(idx);
             if (normalizeIndexNode != null) {
                 return normalizeIndexNode.execute(intIdx, getStoreProfile().profile(store).length());
             }

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/function/PArguments.java

@@ -352,6 +352,7 @@ public static PDict getGeneratorFrameLocals(Object[] arguments) {
     }
 
     public static ThreadState getThreadState(VirtualFrame frame) {
+        assert frame != null;
         return new ThreadState(PArguments.getCurrentFrameInfo(frame), PArguments.getException(frame));
     }