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authorVincent Ambo <mail@tazj.in>2022-09-01T20·50+0300
committertazjin <tazjin@tvl.su>2022-09-08T07·59+0000
commit377ba19d75a0354c51d73dd38c4a29feefcc68e4 (patch)
tree75cc9b21752a29c5b6b35db7530540b84bb78642 /.mailmap
parent197fe37daef242596900bcab948d6fc14348f910 (diff)
feat(tvix/eval): ensure all errors always carry a span r/4741
Previously error spans were optional because the information about
code spans was not available at runtime. Now that this information has
been added, the error type will always carry a span.

This change is very invasive all throughout the codebase. This is due
to the fact that many functions that are called *by* the VM expected
to return `EvalResult`, but this no longer works as the span
information is not available to those functions - only to the VM
itself.

To work around this the majority of these functions have been changed
to return `Result<T, ErrorKind>` instead and an accompanying macro in
the VM constructs the "real" error.

Note that this implementatino currently has a bug where errors
occuring within thunks will yield the location at which the thunk was
forced, not the location at which the error occured within the code.
This will be fixed soon, but the commit is large enough as is.

Change-Id: Ib1ecb81a4d09d464a95ea7ea9e589f3bd08d5202
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6408
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
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