| commit | 24ed98d3fa2de85505d7bd5b9a7c4485bb2105fb | [log] [tgz] |
|---|---|---|
| author | Mark Schaller <mschaller@google.com> | Wed Oct 21 17:47:51 2015 +0000 |
| committer | Kristina Chodorow <kchodorow@google.com> | Thu Oct 22 15:15:24 2015 +0000 |
| tree | 844ac0c7b2f5ef8f68e75c29f3c31cdb6e60852b | |
| parent | 6266229e4a4e4cc7f096a2a087fe691fdc2743a7 [diff] |
Retain first error message during transitive traversal Previously, a TransitiveTraversalFunction computed a value that contained an exception only if the exception resulted from a failure to load the function's immediate target. If the target had transitive dependencies on other targets, those other targets would be loaded, but any errors resulting from loading those targets would not be retained. SkyQueryEnvironment impromperly used a SkyFrame mechanism (which was solely intended to ensure equivalent semantics between keep-going and no-keep-going evaluations) to discover errors in the set of transitive children of TransitiveTraversal nodes. In order to transition SkyQueryEnvironment away from that mechanism, this CL changes TransitiveTraversalFunction to remember the first error message encountered while loading its target and its transitive dependencies. By remembering just the error message as a string, and not the full exception object, this also helps TransitiveTraversalValue have more consistent equality semantics for change-pruning. -- MOS_MIGRATED_REVID=105977182
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