hello
before error
Error: error
    at foo ([WILDCARD]tests/async_error.ts:4:9)
    at eval ([WILDCARD]tests/async_error.ts:7:1)
    at DenoCompiler.eval [as _globalEval] (<anonymous>)
    at DenoCompiler.run (deno/js/compiler.ts:[WILDCARD])
    at denoMain (deno/js/main.ts:[WILDCARD])
    at deno_main.js:1:1