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The following testcase is miscompiled, because a RAW_DATA_CST tree node is shared by multiple CONSTRUCTORs and when the braced_list_to_string function changes one to extend the RAW_DATA_CST over the single preceding and single succeeding INTEGER_CST, it changes the RAW_DATA_CST in the other CONSTRUCTOR where the elts around it are still present. Fixed by tweaking a copy of it instead, like we handle it in other spots. 2025-10-22 Jakub Jelinek <jakub@redhat.com> PR c++/122302 * c-common.cc (braced_list_to_string): Call copy_node on RAW_DATA_CST before changing RAW_DATA_POINTER and RAW_DATA_LENGTH on it. * g++.dg/cpp0x/pr122302.C: New test. * g++.dg/cpp/embed-27.C: New test.
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