diff options
Diffstat (limited to 'tvix')
| -rw-r--r-- | tvix/eval/src/compiler/mod.rs | 6 | ||||
| -rw-r--r-- | tvix/eval/src/tests/tvix_tests/eval-okay-nested-thunks.exp | 1 | ||||
| -rw-r--r-- | tvix/eval/src/tests/tvix_tests/eval-okay-nested-thunks.nix | 7 |
3 files changed, 14 insertions, 0 deletions
diff --git a/tvix/eval/src/compiler/mod.rs b/tvix/eval/src/compiler/mod.rs index 2ae010ada6ed..e3cb15032a14 100644 --- a/tvix/eval/src/compiler/mod.rs +++ b/tvix/eval/src/compiler/mod.rs @@ -1256,6 +1256,12 @@ pub fn compile( c.compile(None, expr); + // The final operation of any top-level Nix program must always be + // `OpForce`. A thunk should not be returned to the user in an + // unevaluated state (though in practice, a value *containing* a + // thunk might be returned). + c.chunk().push_op(OpCode::OpForce); + Ok(CompilationOutput { lambda: c.contexts.pop().unwrap().lambda, warnings: c.warnings, diff --git a/tvix/eval/src/tests/tvix_tests/eval-okay-nested-thunks.exp b/tvix/eval/src/tests/tvix_tests/eval-okay-nested-thunks.exp new file mode 100644 index 000000000000..d81cc0710eb6 --- /dev/null +++ b/tvix/eval/src/tests/tvix_tests/eval-okay-nested-thunks.exp @@ -0,0 +1 @@ +42 diff --git a/tvix/eval/src/tests/tvix_tests/eval-okay-nested-thunks.nix b/tvix/eval/src/tests/tvix_tests/eval-okay-nested-thunks.nix new file mode 100644 index 000000000000..133929dd1961 --- /dev/null +++ b/tvix/eval/src/tests/tvix_tests/eval-okay-nested-thunks.nix @@ -0,0 +1,7 @@ +# If a thunk yields another thunk, OpForce should keep forcing until +# there is a value. +let + a = b; + b = c; + c = 42; +in a |