Parsing errors in compiler: Missing an "else if" or "end if" in if-statement

[GorgonRamsay]

Steps to Reproduce:

1. Compile the following:

func = function()
  if false then
    return "This is returned"
  if true then
    return "This should be returned"
  end if
  return ""
end function

print(func)

Output: This is returned

Actual Results: Compilation was successful.

Expected Results: Compiler error, unmatched block opener.

Additional information:

• The function is necessary for compilation to successfully fail.
• Try without the function to see expected error.
• The issue was observed in the game GreyHack.

[JoeStrout]

Confirmed. Thank you for the report.

[juh9870]

This is caused by end function just discarding function parsing context without checking for unclosed backpatches. Simplified "working" example for this issue:

func = function
  if 0 then
    print "this if is ignored"
end function
func