[Bug]: googlemock's own unit tests invoke Undefined Behavior #4846

Describe the issue

The documentation states:

Important note: gMock requires expectations to be set before the mock functions are called, otherwise the behavior is undefined. Do not alternate between calls to EXPECT_CALL() and calls to the mock functions, and do not set any expectations on a mock after passing the mock to an API.

However, googlemock's own unit tests are violating this requirement, thus invoking Undefined Behavior:

https://github.com/google/googletest/blob/main/googlemock/test/gmock-actions_test.cc#L1472
https://github.com/google/googletest/blob/main/googlemock/test/gmock-actions_test.cc#L1867
https://github.com/google/googletest/blob/main/googlemock/test/gmock-actions_test.cc#L1907
https://github.com/google/googletest/blob/main/googlemock/test/gmock-matchers-arithmetic_test.cc#L1189
https://github.com/google/googletest/blob/main/googlemock/test/gmock-matchers-comparisons_test.cc#L1060
https://github.com/google/googletest/blob/main/googlemock/test/gmock-matchers-containers_test.cc#L1648
https://github.com/google/googletest/blob/main/googlemock/test/gmock-matchers-containers_test.cc#L1776
https://github.com/google/googletest/blob/main/googlemock/test/gmock-matchers-containers_test.cc#L2107
https://github.com/google/googletest/blob/main/googlemock/test/gmock-spec-builders_test.cc#L305
https://github.com/google/googletest/blob/main/googlemock/test/gmock-spec-builders_test.cc#L2422

There are two alternatives moving forward:

• Fixing the tests.
• Making this behavior well-defined, i.e. removing the parts of the documentation that say this is undefined behavior.

Steps to reproduce the problem

N/A

What version of GoogleTest are you using?

trunk

What operating system and version are you using?

N/A

What compiler and version are you using?

N/A

What build system are you using?

N/A

Additional context

No response