travis: Run unit tests --with-sanitizers=undefined #14036
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From the build log:
doesn't seem to be using clang at all.
fad8afa travis: Run unit tests --with-sanitizers=undefined (MarcoFalke) 0d00fd5 depends: allow CC/CXX to be overridden during configure (Cory Fields) Pull request description: See issue #12691 Tree-SHA512: 0772e8e037411cb4664270945a0fc9c0c1ed24eeaf5308460baee707868f7b700d8e740a6babb1d02bc818a8a4b71d9e33601ab2cc850ff315755fcf3d79d29e