Type 'true' could not be converted into 'false'

rabbi99 · March 16, 2025, 6:01pm

I came across a strange issue today saying that “Type ‘true’ could not be converted into ‘false’” in strict mode.

I am using the Luau type checker beta and --!strict mode.

Code sample:

export type CharacterReplicationServer = {
	_started: boolean;
} & typeof(CharacterReplicationServer)

function CharacterReplicationServer.Start(self: CharacterReplicationServer)
	if self._started == true then
		return
	end
	
	self._started = true
end

Expected behavior

I expected no luau typechecker warning.

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