Preserve runtime errors over the statement-terminator check

elk.c

@@ -1317,6 +1317,7 @@ static jsval_t js_stmt(struct js *js) {
     default:            res = resolveprop(js, js_expr(js)); break;
   }
   //printf("STMT [%.*s] -> %s, tok %d, flags %d\n", (int) (js->pos - pos), &js->code[pos], js_str(js, res), next(js), js->flags);
+  if (is_err(res)) return res;  // Preserve the original runtime error; do not clobber it with a "; expected" parse error below.
   if (next(js) != TOK_SEMICOLON && next(js) != TOK_EOF && next(js) != TOK_RBRACE) return js_mkerr(js, "; expected");
   js->consumed = 1;
   // clang-format on

test/unit_test.c

@@ -543,6 +543,12 @@ static void test_c_funcs(void) {
   assert(ev(js, "gt(0.78,-12.5)", "true"));
   // assert(ev(js, "gt(2,2)", "true"));
 
+  // A runtime error returned from a C function should be preserved even when
+  // it appears as part of a larger expression (the trailing operator/operand
+  // must not be misreported as "; expected").
+  assert(ev(js, "gt() * 2", "ERROR: doh"));
+  assert(ev(js, "1 + gt(null, 1)", "ERROR: doh"));
+
   js_set(js, js_glob(js), "set_timer", js_mkfun(js_set_timer));
   js_eval(js, "let v = 0, f = function(x) { v+=x; };", ~0UL);
   js_eval(js, "set_timer('f');", ~0UL);