Missing error when JS file compiled without allowJs on

[RyanCavanaugh]

Steps to reproduce

D:\Throwaway\corsarepro>tsc a.js
error TS6504: File 'a.js' is a JavaScript file. Did you mean to enable the 'allowJs' option?
  The file is in the program because:
    Root file specified for compilation


Found 1 error.


D:\Throwaway\corsarepro>tsgo a.js

D:\Throwaway\corsarepro>

[jakebailey]

I assume this is

typescript-go/testdata/baselines/reference/submodule/compiler/checkJsFiles6.errors.txt.diff

Line 5 in 05f4d69

-error TS6504: File 'a.js' is a JavaScript file. Did you mean to enable the 'allowJs' option?