fix(tvix/eval): Emit errors for invalid integers

Invalid integers (eg integers that're too long) end up as error returns
on the `.value()` returned from the literal in the AST - previously we'd
unwrap this error, causing it to panic the compiler, but now we've got a
nice error variant for it (which just unwraps the underlying
std::num::ParseIntError).

Change-Id: I50c3c5ba89407d86659e20d8991b9658415f39a0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6635
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>

tvix/eval/src/compiler/mod.rs

@@ -192,7 +192,10 @@ impl Compiler<'_, '_> {
     fn compile_literal(&mut self, node: ast::Literal) {
         let value = match node.kind() {
             ast::LiteralKind::Float(f) => Value::Float(f.value().unwrap()),
-            ast::LiteralKind::Integer(i) => Value::Integer(i.value().unwrap()),
+            ast::LiteralKind::Integer(i) => match i.value() {
+                Ok(v) => Value::Integer(v),
+                Err(err) => return self.emit_error(&node, err.into()),
+            },
 
             ast::LiteralKind::Uri(u) => {
                 self.emit_warning(&node, WarningKind::DeprecatedLiteralURL);