Add regression tests

Author: ahejlsberg

tests/cases/compiler/destructuringTuple.ts

@@ -7,3 +7,9 @@ const [a, b, c, ...rest] = tuple;
 declare var receiver: typeof tuple;
 
 [...receiver] = tuple;
+
+// Repros from #32140
+
+const [oops1] = [1, 2, 3].reduce((accu, el) => accu.concat(el), []);
+
+const [oops2] = [1, 2, 3].reduce((acc: number[], e) => acc.concat(e), []);