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llvm-project/llvm/test/Assembler/invalid-mdnode-badref.ll

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IR: Update references to temporaries before deleting During `MDNode::deleteTemporary()`, call `replaceAllUsesWith(nullptr)` to update all tracking references to `nullptr`. This fixes PR22280, where inverted destruction order between tracking references and the temporaries themselves caused a use-after-free in `LLParser`. An alternative fix would be to add an assertion that there are no users, and continue to fix inverted destruction order in clients (like `LLParser`), but instead I decided to make getting-teardown-right easy. (If someone disagrees let me know.) llvm-svn: 226866
2015-01-23 05:36:45 +08:00
; RUN: not llvm-as < %s -disable-output 2>&1 | FileCheck %s
!named = !{!0}
; CHECK: [[@LINE+1]]:14: error: use of undefined metadata '!1'
!0 = !{!0, !1}