So I m hacking on a rule and I m now stuck at a point where

Question

So I m hacking on a rule and I m now stuck at a point where I see this output ad infinitum ```20 03 30 47 ERROR panic at called `Result unwrap ` on an `Err` value Field `content` was not convertible to type alloc vec Vec lt u8 gt PyErr ptype lt class TypeError gt pvalue Some an integer is required got type str ptraceback None src intrinsics rs 354 20 03 30 47 ERROR Please set RUST BACKTRACE=1 re run and then file a bug at <https github com pantsbuild pants issues> 20 03 30 47 INFO Filesystem changed during run retrying ` rule pants backend experimental jvm goals coursier resolve coursier generate lockfile ` in 500ms ```

bored-art-40741 · Answer

That s with `RUST BACKTRACE=1` already set

hundreds-father-404 · Answer

ctrl c aggressively and or use `ps aux | grep pantsd` `kill 9 lt pid gt `

bored-art-40741 · Answer

Oh I didn t have any issue killing it I just don t know what s causing it

bored-art-40741 · Answer

I m betting it s something in this rule

bored-art-40741 · Answer

``` rule level=LogLevel DEBUG async def digest to file digest request ExtractFileDigest gt FileDigest digest = await Get Digest DigestSubset request digest PathGlobs request file path digest contents = await Get DigestContents Digest digest if len digest contents == 0 raise Exception f ExtractFileDigest request file path not found in request digest elif len digest contents gt 1 raise Exception f ExtractFileDigest Unexpected error request file path found multiple times in request digest file content = digest contents 0 hasher = hashlib sha256 hasher update file content content return FileDigest fingerprint=hasher hexdigest serialized bytes length=len file content content ```

hundreds-father-404 · Answer

FFI error Oh I think you re maybe passing unicode `str` instead of `bytes`

bored-art-40741 · Answer

classic

hundreds-father-404 · Answer

FYI this is the intrinsic rule to go from `CreateDigest gt Digest` with a bad `FileContent` entry

bored-art-40741 · Answer

Sorry I didn t follow that

bored-art-40741 · Answer

This is a rule I wrote as a hacky workaround for <https github com pantsbuild pants issues 11806>

hundreds-father-404 · Answer

Are you calling `await Get Digest CreateDigest ` somewhere The Rust stacktrace is saying that the error is coming from the rule written in Rust an intrinsic rule that goes from CreateDigest to Digest Specifically that rule implemented in Rust is failing because the `CreateDigest` object has a `FileContent` value in it that has a field `content` set as unicode str instead of `bytes` To fix your issue you will need to find that bad `FileContent` and encode the `content`

bored-art-40741 · Answer

ah OK that helps

hundreds-father-404 · Answer

I recommend adding this to `FileContent` ```def post init self if isinstance self content str raise ValueError self ``` This will cause Python to error on the problematic FileContent using Python s dataclass mechanism

bored-art-40741 · Answer

ahhh `json dumps` doesn t return `bytes`

bored-art-40741 · Answer

Of course why would a serializer return you something appropriate for the wire Because Python that s why

hundreds-father-404 · Answer

Prob changed between Py2 and Py3 also hehe