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[images] check if temporary file is readable. Refs #257
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@ -1654,7 +1654,7 @@ tp_open(struct type_query *type_query)
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if (url) {
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char *filename = check_url_tempfiles(url);
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if (filename) {
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if (filename && file_can_read(filename)) {
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char *handler = subst_file(type_query->external_handler, filename, filename);
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if (handler) {
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