ascent crash while trying to write image to non existent directory

[cyrush]

We think that using:

image_prefix: "mydir/mypng"

Where mydir doesn't exist, lead to a crash.

We should error, not crash.

[emily-howell]

This does hit a Conduit warning in the ascent_png_encoder.cpp (

ascent/src/libs/png_utils/ascent_png_encoder.cpp

Line 336 in 4b93212

CONDUIT_WARN("Error saving PNG buffer to file: " << filename);

)

It reads "Error saving PNG buffer to file:{path_to_file}"

I tested this with both an absolute path and a relative path and it hits the same error.

Is the desired behavior that the "mydir" get created? Or that the error is more specific?