-
In an attempt to catch bugs involving using undef values, replace undef literals by values likely to cause crashes or test failures. We do this only when validating since it is a deoptimization. This depends on D1857 to catch such bugs in the RTS (such as #11487). Test Plan: Did a build with ``` BuildFlavour = quick-llvm SRC_HC_OPTS_STAGE1 = -fllvm-fill-undef-with-garbage ``` The build crashed when running ghc-stage2, as expected. Reviewers: austin, bgamari Reviewed By: bgamari Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1858
d50609e8