tests/cases/compiler/externalModuleWithoutCompilerFlag1.ts(3,17): error TS1148: Cannot compile modules unless the '--module' flag is provided. ==== tests/cases/compiler/externalModuleWithoutCompilerFlag1.ts (1 errors) ==== // Not on line 0 because we want to verify the error is placed in the appropriate location. export module M { ~ !!! error TS1148: Cannot compile modules unless the '--module' flag is provided. }