Pull Request validation tests

Undefine allocation function for C extension class

Failed in 14m 50s
:ruby: 2.6.expeditor/buildkite/run_linux_tests.sh
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Ran in 35s
:ruby: 2.6.expeditor/buildkite/run_linux_tests.sh
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Ran in 1m 13s
:ruby: 3.0.expeditor/buildkite/run_linux_tests.sh
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:ruby: 3.0.expeditor/buildkite/run_linux_tests.sh
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Total Job Run Time: 21m 29s