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-rw-r--r--tvix/eval/src/tests/tvix_tests/eval-okay-catchable-in-update-attrs.exp (renamed from tvix/eval/src/tests/tvix_tests/notyetpassing/eval-okay-catchable-in-update-attrs.exp)0
-rw-r--r--tvix/eval/src/tests/tvix_tests/eval-okay-catchable-in-update-attrs.nix (renamed from tvix/eval/src/tests/tvix_tests/notyetpassing/eval-okay-catchable-in-update-attrs.nix)0
-rw-r--r--tvix/eval/src/vm/mod.rs15
3 files changed, 11 insertions, 4 deletions
diff --git a/tvix/eval/src/tests/tvix_tests/notyetpassing/eval-okay-catchable-in-update-attrs.exp b/tvix/eval/src/tests/tvix_tests/eval-okay-catchable-in-update-attrs.exp
index c508d5366f70..c508d5366f70 100644
--- a/tvix/eval/src/tests/tvix_tests/notyetpassing/eval-okay-catchable-in-update-attrs.exp
+++ b/tvix/eval/src/tests/tvix_tests/eval-okay-catchable-in-update-attrs.exp
diff --git a/tvix/eval/src/tests/tvix_tests/notyetpassing/eval-okay-catchable-in-update-attrs.nix b/tvix/eval/src/tests/tvix_tests/eval-okay-catchable-in-update-attrs.nix
index 38a91690345b..38a91690345b 100644
--- a/tvix/eval/src/tests/tvix_tests/notyetpassing/eval-okay-catchable-in-update-attrs.nix
+++ b/tvix/eval/src/tests/tvix_tests/eval-okay-catchable-in-update-attrs.nix
diff --git a/tvix/eval/src/vm/mod.rs b/tvix/eval/src/vm/mod.rs
index 642b6317caee..312d1b893520 100644
--- a/tvix/eval/src/vm/mod.rs
+++ b/tvix/eval/src/vm/mod.rs
@@ -661,10 +661,17 @@ impl<'o> VM<'o> {
                 OpCode::OpAttrs(Count(count)) => self.run_attrset(&frame, count)?,
 
                 OpCode::OpAttrsUpdate => {
-                    let rhs = self.stack_pop().to_attrs().with_span(&frame, self)?;
-                    let lhs = self.stack_pop().to_attrs().with_span(&frame, self)?;
-
-                    self.stack.push(Value::attrs(lhs.update(*rhs)))
+                    let rhs = self.stack_pop();
+                    let lhs = self.stack_pop();
+                    if lhs.is_catchable() {
+                        self.stack.push(lhs);
+                    } else if rhs.is_catchable() {
+                        self.stack.push(rhs);
+                    } else {
+                        let rhs = rhs.to_attrs().with_span(&frame, self)?;
+                        let lhs = lhs.to_attrs().with_span(&frame, self)?;
+                        self.stack.push(Value::attrs(lhs.update(*rhs)))
+                    }
                 }
 
                 OpCode::OpInvert => {