fix(tvix/eval): builtins.match: propagate catchables

Change-Id: I14c9e625c91369e10d0c00380dca992811ae9059
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10346
Reviewed-by: sterni <sternenseemann@systemli.org>
Autosubmit: Adam Joseph <adam@westernsemico.com>
Tested-by: BuildkiteCI

tvix/eval/src/builtins/mod.rs

@@ -766,8 +766,16 @@ mod pure_builtins {
 
     #[builtin("match")]
     async fn builtin_match(co: GenCo, regex: Value, str: Value) -> Result<Value, ErrorKind> {
-        let s = str.to_str()?;
-        let re = regex.to_str()?;
+        let s = str;
+        if s.is_catchable() {
+            return Ok(s);
+        }
+        let s = s.to_str()?;
+        let re = regex;
+        if re.is_catchable() {
+            return Ok(re);
+        }
+        let re = re.to_str()?;
         let re: Regex = Regex::new(&format!("^{}$", re.as_str())).unwrap();
         match re.captures(&s) {
             Some(caps) => Ok(Value::List(

tvix/eval/src/tests/tvix_tests/eval-okay-builtins-match-propagate-catchables.exp

@@ -0,0 +1 @@
+false

tvix/eval/src/tests/tvix_tests/eval-okay-builtins-match-propagate-catchables.nix

@@ -0,0 +1 @@
+(builtins.tryEval (builtins.match (throw "foo") ".*")).success