tests/cases/compiler/missingArgument1.ts(1,7): error TS1135: Argument expression expected. tests/cases/compiler/missingArgument1.ts(1,1): error TS2304: Cannot find name 'foo'. tests/cases/compiler/missingArgument1.ts(1,5): error TS2304: Cannot find name 'a'. tests/cases/compiler/missingArgument1.ts(1,8): error TS2304: Cannot find name 'b'. ==== tests/cases/compiler/missingArgument1.ts (4 errors) ==== foo(a,,b); !!! error TS1135: Argument expression expected. ~~~ !!! error TS2304: Cannot find name 'foo'. ~ !!! error TS2304: Cannot find name 'a'. ~ !!! error TS2304: Cannot find name 'b'.