gdb/

	* python/py-breakpoint.c (bppy_set_condition): New comment.
	* python/py-cmd.c (cmdpy_function): Call also gdbpy_print_stack for
	failed PyUnicode_Decode.
	(cmdpy_completer): Skip element for failed
	python_string_to_host_string.
	(cmdpy_init): Return -1 on failed python_string_to_host_string.
	* python/py-frame.c (frapy_read_var): Extend the function comment.
	* python/py-function.c (fnpy_init): Return -1 on failed
	python_string_to_host_string.
	* python/py-inferior.c (infpy_read_memory, infpy_write_memory): Extend
	the function comment.
	(infpy_search_memory): Extend the function comment.  Remove the
	PyErr_SetString call on already set error state.
	* python/py-param.c (set_parameter_value): Extend the function
	comment.  Return -1 on failed python_string_to_host_string, twice.
	(set_attr): Extend the function comment.
	(compute_enum_values): Extend the function comment.  New variable
	back_to.  Protect self->enumeration by BACK_TO cleanups.  Return 0 on
	failed python_string_to_host_string.
	(get_doc_string): Call gdbpy_print_stack on failed
	python_string_to_host_string.
	(parmpy_init): Extend the function comment.
	* python/py-prettyprint.c (pretty_print_one_value): Likewise.
	(gdbpy_get_display_hint, print_children): Call gdbpy_print_stack on
	failed python_string_to_host_string.
	* python/py-value.c (valpy_new, valpy_getitem, valpy_call)
	(valpy_binop, valpy_richcompare): Extend the function comment.
	* python/python.c
	(struct python_env) <error_type, error_value, error_traceback>: New
	fields.
	(restore_python_env): Handle PyErr_Occurred.  Call PyErr_Restore.
	(ensure_python_env): Call PyErr_Fetch.
	* varobj.c (update_dynamic_varobj_children): Call gdbpy_print_stack on
	failed convert_value_from_python.
	(value_get_print_value): Call gdbpy_print_stack on failed
	python_string_to_target_python_string.

gdb/testsuite/
	* gdb.python/py-error.exp: New file.
	* gdb.python/py-error.py: New file.

1 files changed, 11 insertions, 4 deletions

diff --git a/gdb/python/py-prettyprint.c b/gdb/python/py-prettyprint.c
index 7aa83bc..cc6a346 100644
--- a/gdb/python/py-prettyprint.c
+++ b/gdb/python/py-prettyprint.c
@@ -196,8 +196,8 @@ find_pretty_printer (PyObject *value)
    is returned.  If the function returns Py_NONE that means the pretty
    printer returned the Python None as a value.  Otherwise, if the
    function returns a value,  *OUT_VALUE is set to the value, and NULL
-   is returned.  On error, *OUT_VALUE is set to NULL, and NULL is
-   returned.  */
+   is returned.  On error, *OUT_VALUE is set to NULL, NULL is
+   returned, with a python exception set.  */
 
 static PyObject *
 pretty_print_one_value (PyObject *printer, struct value **out_value)
@@ -243,7 +243,11 @@ gdbpy_get_display_hint (PyObject *printer)
   if (hint)
     {
       if (gdbpy_is_string (hint))
-	result = python_string_to_host_string (hint);
+	{
+	  result = python_string_to_host_string (hint);
+	  if (result == NULL)
+	    gdbpy_print_stack ();
+	}
       Py_DECREF (hint);
     }
   else
@@ -566,7 +570,10 @@ print_children (PyObject *printer, const char *hint,
 	  else
 	    {
 	      output = python_string_to_host_string (py_v);
-	      fputs_filtered (output, stream);
+	      if (!output)
+		gdbpy_print_stack ();
+	      else
+		fputs_filtered (output, stream);
 	      xfree (output);
 	    }
 	}