Add missing may_raise decorator

Author: fangerer

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

@@ -725,6 +725,7 @@ abstract static class PyTruffleWriteUnraisable extends PythonBuiltinNode {
         Object run(PBaseException exception, Object object,
                         @Cached WriteUnraisableNode writeUnraisableNode) {
             writeUnraisableNode.execute(null, exception, null, (object instanceof PNone) ? PNone.NONE : object);
+            getContext().setCaughtException(PException.NO_EXCEPTION);
             return PNone.NO_VALUE;
         }
     }

graalpython/lib-graalpython/python_cext.py

@@ -289,6 +289,7 @@ def PyTruffle_Object_LEN(obj):
 
 ##################### BYTES
 
+@may_raise(-1)
 def PyBytes_AsStringCheckEmbeddedNull(obj, encoding):
     if not PyBytes_Check(obj):
         raise TypeError('expected bytes, {!s} found'.format(type(obj)))
@@ -312,6 +313,7 @@ def PyBytes_Concat(original, newpart):
     return original + newpart
 
 
+@may_raise
 def PyBytes_FromFormat(fmt, args):
     formatted = fmt % args
     return formatted.encode()