Fix Sabre rebuild with nested Var and Stretch (backport #14488)
#14494
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The `empty_dag` helper, used to construct control-flow blocks, in the rebuilder failed to account for `Var` or `Stretch` nodes. We have integration tests in `test/python/compiler/test_transpiler.py` that _in theory_ should have caught this, but in practice failed to because they are accidentally using all-to-all connectivity backends, so Sabre never runs in them. (cherry picked from commit 985bd7a)
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jakelishman
approved these changes
May 28, 2025
Pull Request Test Coverage Report for Build 15305467320Details
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The
empty_daghelper, used to construct control-flow blocks, in the rebuilder failed to account forVarorStretchnodes. We have integration tests intest/python/compiler/test_transpiler.pythat in theory should have caught this, but in practice failed to because they are accidentally using all-to-all connectivity backends, so Sabre never runs in them.Summary
Details and comments
This fixes the test failures that #14484 turned up.
This is an automatic backport of pull request #14488 done by [Mergify](https://mergify.com).