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"Essential initialization failed" when running example with --features freeze-stdlib #4292
Description
I'm getting the following when running any example as such:
cargo run --example hello_embed --features freeze-stdlib
thread 'main' panicked at 'essential initialization failed; run with RUST_BACKTRACE=1 to see Python backtrace', vm/src/vm/mod.rs:283:30
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Is this intended? Why? When and how should I use freeze-stdlib?
Activity
DimitrisJim commentedon Nov 23, 2022
Nothing has been added as frozen since
hello_embedrunswithout_stdlib. In cases where you'd like to freeze the non-native modules you'd usewith_initand callvm.add_frozen(rustpython_pylib::frozen_stdlib())in it.DimitrisJim commentedon Nov 23, 2022
Note that in this case, the
codecsmodule couldn't be loaded, if you run it after settingRUST_BACKTRACEyou'll see the import error.jimmiebtlr commentedon Nov 27, 2022
How did you resolve the codecs error? I'm seeing that error when using some of the examples, however the python code actually seems to run still.