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authorVincent Ambo <mail@tazj.in>2022-08-28T03·07+0300
committertazjin <tazjin@tvl.su>2022-09-06T07·45+0000
commit776120de05fc9f26d1af5da92d8b25ec26648365 (patch)
tree21e04f3aa6575e54d0cf4dd074a9536326502cf6 /tvix/eval/src/tests/tvix_tests/eval-okay-poisoned-scopes.exp
parentccfb971dc54cb77522d70f1ecbf1e9080e7ba0ca (diff)
fix(tvix/eval): instantiate *new* closures from blueprints each time r/4659
The previous closure refactoring introduced a bug in which the same
closure object would get mutated constantly for each instance of a
closure, which is incorrect behaviour.

This commit instead introduces an explicit new Value variant for the
internal "blueprint" that the compiler generates (essentially just the
lambda) and uses this variant to construct the closure at runtime.

If the blueprint ever leaks out to a user somehow that is a critical
bug and tvix-eval will panic.

As a ~treat~ test for this, the fibonacci function is being used as it
is a self-recursive closure (i.e. different instantiations of the same
"blueprint") getting called with different values and it's good to
have it around.

Change-Id: I485de675e9bb0c599ed7d5dc0f001eb34ab4c15f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6323
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Diffstat (limited to 'tvix/eval/src/tests/tvix_tests/eval-okay-poisoned-scopes.exp')
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