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[clang-tidy] bugprone-use-after-move false positive with forwarding class member #236015
Description
The following code:
#include <utility>
struct Obj
{
int a;
int b;
};
void binaryF(int a, int b)
{}
template<typename... Args>
void fun(Args&&... args)
{
(binaryF(args.a, std::forward<Args>(args).b), ...);
}
void f()
{
fun(Obj{1, 2}, Obj{3, 4});
}Would trigger bugprone-use-after-move because the check thinks that args is used after being forwarded. But it is not it is never forwarded (consumed), only its member is so using args.a is perfectly safe. Godbolt: https://godbolt.org/z/efMKEoE47
Activity
llvmorg-github-actions commentedon Oct 27, 2026
@llvm/issue-subscribers-clang-tidy
Author: Evgeniy Shcherbina (ixSci)
Details
The following code: ```cpp #include <utility> struct Obj { int a; int b; };void binaryF(int a, int b)
{}
template<typename... Args>
void fun(Args&&... args)
{
(binaryF(args.a, std::forward<Args>(args).b), ...);
}
void f()
{
fun(Obj{1, 2}, Obj{3, 4});
}
yashaggarwal85d commentedon Oct 27, 2026
Raised a PR for a potential fix for this issue. Thanks