GB0012

Graph-Break Type

Short name describing what triggered the graph break

Attempted to read undefined local variable (implicit)

Values or code snippet captured at the break point

LOAD_FAST {name}

Explanation of why the graph break was triggered

Could not find an implicit local variable with name {name}

Hints on how to resolve the graph break

This happens in dict/list comprehensions
Dynamo has detected that tracing the code will result in an error when running in eager. Please double check that your code doesn’t contain a similar error when actually running eager/uncompiled.