chore: add failing test for #794

test/command.js

@@ -1100,6 +1100,20 @@ describe('Command', function () {
           })
           .argv
       })
+
+      // addresses https://github.com/yargs/yargs/issues/794
+      it('should bubble errors thrown by coerce function inside commands', function (done) {
+        yargs
+          .command('foo', 'the foo command', (yargs) => {
+            yargs.coerce('x', function (arg) {
+              throw Error('yikes an error')
+            })
+          })
+          .parse('foo -x 99', function (err) {
+            err.message.should.match(/yikes an error/)
+            return done()
+          })
+      })
     })
 
     describe('defaults', function () {