Function args inconsistent with erroring vs not

[VividLemon]

Bug Report

🔎 Search Terms

Function args errors, args errors, function (Lets be honest, if there's a duplicate theres 5k issues to sort through)

🕗 Version & Regression Information

• This is a crash
• This changed between versions 4.6.4 and 4.7.4
• This is the behavior in every version I tried, and I reviewed the FAQ for entries about _________
• I was unable to test this on prior versions because _______

⏯ Playground Link

https://www.typescriptlang.org/play?ts=4.7.4#code/LAKAxg9gdgzgLgAgGYFcoILwIBQEMBcC8ATgJZQDmANAgG4CMhUKAtgEYCmxNtATE607c6AZkIlyFAJTi4ZSpgB8CAN6gECYhzgpi6AOS59oAL6hQqKNkP6aIqvYQ27NACw0ArFKA

Playground link with relevant code

💻 Code

const fun = (a: string, v1: number, v2: number, v3: string): string => {
  return 'a'
}

fun('a', 3,3, 'a', 3, 4, 5)

🙁 Actual behavior

Almost randomly, adding or changing args of a function will sometimes not cause it to have an error

🙂 Expected behavior

Have an error if an arg is missing

Review this video https://youtu.be/NhvZUvNglcQ ... It is almost random in how it will sometimes active an error, and sometimes not. If it's left to not have an error, it will seemingly never change to show an error.

[RyanCavanaugh]

I believe this is a duplicate of #49624 based on the symptoms. Reprioritizing that one.

[VividLemon]

They look to be the same.