fix(jit): Typo resulted in try/catch clause to never be reached

closes #192

src/mirjit.zig

@@ -4462,8 +4462,8 @@ fn generateTry(self: *Self, try_node: *n.TryNode) Error!?m.MIR_op_t {
         self.BEQ(
             m.MIR_new_label_op(
                 self.ctx,
-                if (index < try_node.clauses.keys().len - 1)
-                    clause_labels.items[index + 1]
+                if (idx < try_node.clauses.keys().len - 1)
+                    clause_labels.items[idx + 1]
                 else if (unconditional_label) |unconditional|
                     unconditional
                 else

tests/064-throw-inside-try.buzz

@@ -0,0 +1,25 @@
+import "std";
+
+fun willFail() > void !> str {
+    if (false) {
+        throw "Hey";
+    }
+}
+
+object SomeError {}
+
+fun run() > void {
+    try {
+        willFail();
+
+        throw SomeError{};
+    } catch (str _) {
+        assert(false, message: "Could throw inside try/catch");
+    } catch (SomeError _) {
+        assert(true, message: "Could throw inside try/catch");
+    }
+}
+
+test "Throw inside try/catch" {
+    run();
+}