Blame SOURCES/libxml2-python3-unicode-errors.patch

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Index: libxml2-2.9.5/python/libxml.c
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===================================================================
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--- libxml2-2.9.5.orig/python/libxml.c
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+++ libxml2-2.9.5/python/libxml.c
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@@ -1620,6 +1620,7 @@ libxml_xmlErrorFuncHandler(ATTRIBUTE_UNU
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     PyObject *message;
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     PyObject *result;
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     char str[1000];
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+    unsigned char *ptr = (unsigned char *)str;
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 #ifdef DEBUG_ERROR
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     printf("libxml_xmlErrorFuncHandler(%p, %s, ...) called\n", ctx, msg);
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@@ -1636,12 +1637,20 @@ libxml_xmlErrorFuncHandler(ATTRIBUTE_UNU
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 	    str[999] = 0;
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         va_end(ap);
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+#if PY_MAJOR_VERSION >= 3
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+        /* Ensure the error string doesn't start at UTF8 continuation. */
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+        while (*ptr && (*ptr & 0xc0) == 0x80)
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+            ptr++;
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+#endif
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+
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         list = PyTuple_New(2);
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         PyTuple_SetItem(list, 0, libxml_xmlPythonErrorFuncCtxt);
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         Py_XINCREF(libxml_xmlPythonErrorFuncCtxt);
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-        message = libxml_charPtrConstWrap(str);
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+        message = libxml_charPtrConstWrap(ptr);
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         PyTuple_SetItem(list, 1, message);
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         result = PyEval_CallObject(libxml_xmlPythonErrorFuncHandler, list);
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+        /* Forget any errors caused in the error handler. */
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+        PyErr_Clear();
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         Py_XDECREF(list);
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         Py_XDECREF(result);
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     }