[all-commits] [llvm/llvm-project] 6a6884: [llvm][mustache] Fix UB in ASTNode::render()

[Paul Kirth via All-commits]

  Branch: refs/heads/users/ilovepi/mustache-fix-ub
  Home:   https://github.com/llvm/llvm-project
  Commit: 6a6884105656e36834a257ea4997a780f6db5014
      https://github.com/llvm/llvm-project/commit/6a6884105656e36834a257ea4997a780f6db5014
  Author: Paul Kirth <paulkirth at google.com>
  Date:   2025-05-30 (Fri, 30 May 2025)

  Changed paths:
    M llvm/lib/Support/Mustache.cpp

  Log Message:
  -----------
  [llvm][mustache] Fix UB in ASTNode::render()

The current implementation set a reference to a nullptr, leading to all
kinds of problems. Instead, we can check the various uses to ensure we
don't deref invalid memory, and improve the logic for how contexts are
passed to children, since that was also subtly wrong in some cases.



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