TypeInferenceUnification error when unpacking two pairs

[m-kus]

I get TypeInferenceUnification error when trying to run the following program:

fn main() {
    let (a, b): (u32, u32) = (0, 1);
    assert!(jet::eq_32(a, 0));

    let (c, d): (u32, u32) = (2, 3);
    assert!(jet::eq_32(c, 2));
    assert!(jet::eq_32(d, 3));
}

This does not reproduce in BitMachine (I suppose because it does not run type checking?) but only when using https://github.com/BlockstreamResearch/rust-simplicity/blob/33b043f9a153f0d7be82dee8fbd61179ad63b888/simplicity-sys/src/tests/mod.rs#L113 (which calls the same code as Elements node under the hood).

When I'm trying to disassemble I get:

Error: failed to decode program: failed to apply bound1to existing bound2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (2^64 × (... × ...))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))): comp combinator: left target = right source

[uncomputable]

Interesting. I couldn't reproduce the error on the Simfony IDE, but that website is running an older version. I will try the latest version next.

[m-kus]

Ok thanks! I'm using this cli tool, in case it might be handy:

cargo install --git https://github.com/keep-starknet-strange/stark-symphony --rev d552969f2c64ce9fa80dc6a45bab17a4f6204bc9 simfony-cli

Then to build & run:

simfony run main.simf
simfony build main.simf --output-format simpl

[uncomputable]

I could reproduce the error using your stark-symphony crate.

This bug might be related to issues on Windows (BlockstreamResearch/rust-simplicity#274) or issues with values (BlockstreamResearch/rust-simplicity#275).

I am debugging and I will publish a new version of Simfony once I'm done. I will include a unit test with your program to prevent future regression.