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test(tvix/eval): add test for mutually recursive let bindings

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This test shows that let bindings' dependencies can form a cyclical
graph, so we need to use thunking to break this cycle.

Change-Id: I2a4de71fd7024f3d3d1166154784139a82f39411
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6495
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: sterni <sternenseemann@systemli.org>
This commit is contained in:
sterni 2022-09-06 16:34:10 +02:00 committed by tazjin
parent 240d90aa8a
commit bb1adbb05b
2 changed files with 15 additions and 0 deletions
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1
tvix/eval/src/tests/tvix_tests/eval-okay-mutually-recursive-let-binding.exp Normal file
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@ -0,0 +1 @@
{ a = 1; b = 2; c = 3; }

14
tvix/eval/src/tests/tvix_tests/eval-okay-mutually-recursive-let-binding.nix Normal file
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@ -0,0 +1,14 @@
let
a = {
a = 3;
b = b.b;
};
b = {
a = a.a - 2;
b = 2;
c = a.c or 3;
};
in
a // b