StackOverflowError in sort called on numpy array.

[JaroslavTulach]

The numpy example can be extended to invoke arr.sort - then it gets into endless loop in EqualscomplexNode.equalsInteropObjectWithMembers where

selfMember: <builtin-method 'PBuiltinFunction numpy.float64.is_integer at 0x1d7c90cd' of 'PythonAbstractNativeObject(com.oracle.truffle.nfi.NFIPointer@6b22e8eb)' objects> 
otherMember: <builtin-method 'PBuiltinFunction numpy.float64.is_integer at 0x1d7c90cd' of 'PythonAbstractNativeObject(com.oracle.truffle.nfi.NFIPointer@ae713af)' objects>

e.g. comparing PythonAbstractNativeObject is repeated many, many times.

[JaroslavTulach]

Reported to GraalVM guys as

• numpy numbers aren't reported as numbers oracle/graalpython#354

bug.

[JaroslavTulach]

Brutal workaround that converts numpy.float* into Double:

diff --git engine/runtime/src/main/java/org/enso/interpreter/node/expression/builtin/interop/syntax/HostValueToEnsoNode.java engine/runtime/src/main/java/org/enso/interpreter/node/expression/builtin/interop/syntax/HostValueToEnsoNode.java
index 25d58ecd0b..9e6e74b6df 100644
--- engine/runtime/src/main/java/org/enso/interpreter/node/expression/builtin/interop/syntax/HostValueToEnsoNode.java
+++ engine/runtime/src/main/java/org/enso/interpreter/node/expression/builtin/interop/syntax/HostValueToEnsoNode.java
@@ -8,13 +8,17 @@ import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.NeverDefault;
 import com.oracle.truffle.api.dsl.ReportPolymorphism;
 import com.oracle.truffle.api.dsl.Specialization;
+import com.oracle.truffle.api.interop.ArityException;
 import com.oracle.truffle.api.interop.InteropLibrary;
 import com.oracle.truffle.api.interop.TruffleObject;
+import com.oracle.truffle.api.interop.UnknownIdentifierException;
 import com.oracle.truffle.api.interop.UnsupportedMessageException;
+import com.oracle.truffle.api.interop.UnsupportedTypeException;
 import com.oracle.truffle.api.library.CachedLibrary;
 import com.oracle.truffle.api.nodes.Node;
 import org.enso.interpreter.node.expression.builtin.number.utils.ToEnsoNumberNode;
 import org.enso.interpreter.node.expression.foreign.CoerceNothing;
+import org.enso.interpreter.runtime.data.EnsoObject;
 import org.enso.interpreter.runtime.data.text.Text;
 import org.enso.interpreter.runtime.error.WarningsLibrary;
 
@@ -92,6 +96,37 @@ public abstract class HostValueToEnsoNode extends Node {
     return coerceNothing.execute(o);
   }
 
+  @Specialization(guards = "isNumpyFloat(iop, o)")
+  Object doNumpyFloat(
+      TruffleObject o, @Shared("iop") @CachedLibrary(limit = "3") InteropLibrary iop) {
+    try {
+      var n = iop.invokeMember(o, "__float__");
+      if (iop.fitsInDouble(n)) {
+        return iop.asDouble(n);
+      }
+    } catch (UnsupportedMessageException
+        | ArityException
+        | UnknownIdentifierException
+        | UnsupportedTypeException ex) {
+    }
+    return o;
+  }
+
+  static boolean isNumpyFloat(InteropLibrary iop, Object o) {
+    if (o instanceof EnsoObject) {
+      return false;
+    }
+    try {
+      if (iop.hasMetaObject(o)) {
+        var meta = iop.getMetaObject(o);
+        var fqn = iop.asString(iop.getMetaQualifiedName(meta));
+        return fqn.startsWith("numpy.float");
+      }
+    } catch (UnsupportedMessageException ex) {
+    }
+    return false;
+  }
+
   @Fallback
   Object doOther(Object o) {
     return o;