Blame SOURCES/httpd-2.4.6-r1775832.patch

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--- a/modules/filters/mod_ext_filter.c 2016/12/23 12:35:43 1775831
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+++ b/modules/filters/mod_ext_filter.c 2016/12/23 12:36:26 1775832
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@@ -757,6 +757,13 @@
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             break;
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         }
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+        if (AP_BUCKET_IS_ERROR(b)) {
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+            apr_bucket *cpy;
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+            apr_bucket_copy(b, &cpy);
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+            APR_BRIGADE_INSERT_TAIL(bb_tmp, cpy);
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+            break;
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+        }
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+
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         rv = apr_bucket_read(b, &data, &len, APR_BLOCK_READ);
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         if (rv != APR_SUCCESS) {
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             ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01463) "apr_bucket_read()");