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authorGriffin Smith <root@gws.fyi>2022-10-10T19·57-0400
committerclbot <clbot@tvl.fyi>2022-10-10T20·35+0000
commit25921134353e785b509d4debeb11b3bf209c92b3 (patch)
treeb570ab1d762108121f93b22ee77da39ed8567e54 /tvix/eval/src/compiler/mod.rs
parent4fd18cbc9a756ea51dd04fa7bde9cfc79f4f8fa3 (diff)
fix(tvix/eval): Thunk `if` expr r/5090
Since the body of an `if` expr can refer to deferred upvalues, it needs
to be thunked so when we actually compile those deferred upvalues we
have something for the finalize op to point at. Without this all sorts
of weird things can happen due to the finalize op being run in the wrong
lambda context, up to and including a panic.

Change-Id: I040d5e1a7232fd841cfa4953539898fa49cbbb83
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6929
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
Diffstat (limited to 'tvix/eval/src/compiler/mod.rs')
-rw-r--r--tvix/eval/src/compiler/mod.rs4
1 files changed, 3 insertions, 1 deletions
diff --git a/tvix/eval/src/compiler/mod.rs b/tvix/eval/src/compiler/mod.rs
index cfb0ee64a6d8..fa08d626aaa3 100644
--- a/tvix/eval/src/compiler/mod.rs
+++ b/tvix/eval/src/compiler/mod.rs
@@ -212,7 +212,9 @@ impl Compiler<'_> {
             ast::Expr::Assert(assert) => {
                 self.thunk(slot, assert, move |c, s| c.compile_assert(s, assert))
             }
-            ast::Expr::IfElse(if_else) => self.compile_if_else(slot, if_else),
+            ast::Expr::IfElse(if_else) => {
+                self.thunk(slot, if_else, move |c, s| c.compile_if_else(s, if_else))
+            }
             ast::Expr::LetIn(let_in) => self.compile_let_in(slot, let_in),
             ast::Expr::Ident(ident) => self.compile_ident(slot, ident),
             ast::Expr::With(with) => self.thunk(slot, with, |c, s| c.compile_with(s, with)),