| Issue |
140519
|
| Summary |
Clang 20 breaks deduction for function templates with variadic template template arguments used in the return type
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
viccie30
|
A [test in Catch2](https://github.com/catchorg/Catch2/blob/74fcff6e5b190fb833a231b7f7c1829e3c3ac54d/tests/SelfTest/UsageTests/Misc.tests.cpp#L387-L389) fails to build since Clang 20. I have reduced the issue to the difference in the treatment of the deduction of variadic template template arguments. You can see the issue on Godbolt: https://godbolt.org/z/4s8f6PzMa.
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