esbuild compile typescript error

[wszgrcy]

let tag = { start: 0, end: 0 };
  let endColumnIndex = 0;
  console.log(tag.start! < endColumnIndex, tag.end! >= endColumnIndex);

output

{
  warnings: [],
  code: 'let tag = { start: 0, end: 0 };\n' +
    'let endColumnIndex = 0;\n' +
    'console.log(tag.start = endColumnIndex);\n',
  map: '',
  mangleCache: undefined,
  legalComments: undefined
}

code

  let a =await transform(
    `  let tag = { start: 0, end: 0 };
  let endColumnIndex = 0;
  console.log(tag.start! < endColumnIndex, tag.end! >= endColumnIndex);`,
    { loader: 'ts' }
  );
  console.log(a);

version:0.17.18

[hyrious]

This is interesting: https://www.typescriptlang.org/play?#code/FAMw9mAEA8kIwBpICZID5IAoBGBDATgJTBA

foo < 1, 2 >= (bar)
// js: foo < 1, 2 >= (bar)

foo < 1, 2 > (bar)
// js: foo(bar)

Babel seems to handle foo < 1, 2 > bar and for < 1, 2 > (bar) well, but fails at >= too:

foo < 1, 2 >= bar
// Invalid left-hand side in assignment expression.

Sucrase produces the same result as esbuild.