Improve error message when passing a tuple of non-concrete values as … #7952
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…an axis argument. Previously, we would see the less helpful error: ``` jax._src.errors.TracerIntegerConversionError: The __index__() method was called on the JAX Tracer object Traced<ShapedArray(int32[])>with<DynamicJaxprTrace(level=5/0)> See https://jax.readthedocs.io/en/latest/errors.html#jax.errors.TracerIntegerConversionError ``` Whereas now we see: ``` jax._src.errors.ConcretizationTypeError: Abstract tracer value encountered where concrete value is expected: Traced<ShapedArray(int32[], weak_type=True)>with<DynamicJaxprTrace(level=0/1)> The axis argument must be known statically. While tracing the function h at /Users/phawkins/p/jax/tests/lax_numpy_test.py:3663 for jit, this concrete value was not available in Python because it depends on the value of the argument 'y'. See https://jax.readthedocs.io/en/latest/errors.html#jax.errors.ConcretizationTypeError ```
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…an axis argument.
Previously, we would see the less helpful error:
Whereas now we see: