Assertion failure on Auto-Scheduling

[DerZc]

The following program triggers an assertion failure:

.decl A(x:float)
.decl B(x: unsigned)
.decl res(a:float)
.output res 

A(-1).
B(1).

res(a) :- B(x), A(a).

This is the command:

souffle test.dl -p profile --emit-statistics
souffle -c test.dl --auto-schedule=profile -o binary

The second command triggers the assertion failure:

souffle: /tmp/souffle/src/ast2ram/utility/SipsMetric.cpp:134: virtual std::vector<long unsigned int> souffle::ast::SelingerProfileSipsMetric::getReordering(const souffle::ast::Clause*, const std::vector<std::__cxx11::basic_string<char> >&) const: Assertion `profileUseAnalysis->hasAutoSchedulerStats() && "Must have stats in order to auto-schedule!"' failed.
Aborted

If I remove the B(x) in the rule, then there is no assertion failure, but still get the message failed to execute binary.
The souffle version is 0ad4109

[fangyi-zhou]

I've attempted to fix the auto-scheduler in #2421. There has been a few commits refactoring the auto-scheduler and the refactoring is likely the cause of these errors. If you need to use the auto-scheduler, the easiest way is to revert the refactoring commits manually.