Running clang-format 21.1.1 on the following which was indented using clang-format 19:

void MyClass::operator()() { namespace1::util::scope_guard const markExecuted([this] { isExecuted_ = true; }); SomeAPI::operator()(); }

using _clang-format:

--- BasedOnStyle: Google IndentWidth: 4 ColumnLimit: 100 AlignConsecutiveDeclarations: Consecutive ...

results in the incorrect splitting of "SomeAPI::" from the "operator()();"

void MyClass::operator()() { namespace1::util::scope_guard const markExecuted([this] { isExecuted_ = true; }); SomeAPI:: operator()(); }

clang-format 19 does not do this splitting.

Note, I'm upgrading from clang-format 19 to 21 and I did not try 20, so not sure when the behavior regressed.