OnFix error when trying to save changes to a .aplc file opened with )ed myclass.aplc. This is Link issue 257, fixed in link 2.1.

[dyavc]

Describe the bug
Get an odd error when trying to save changes to a .aplc file opened with )ed myclass.aplc.

This is reported to Dyalog Support by a user.

This looks like a return of Link issue #257, fixed in link 2.1.

To Reproduce
download attached .aplc file to a directory such as c:\tmp
⍝ in 19.0 with Link 4.0.17
)ed c:\tmp\myclass2.aplc

Expected behaviour
It works as expected in 18.2.50238 with link 3.0.19. Do not get the error.

Session transcript
]tools.version
Dyalog 19.0.50411 64-bit Unicode, BuildID 64bbdef6
OS Windows 10 or Windows Server 2016 64-bit
Link 4.0.17
SALT 2.915
UCMD 2.6

⍝ Also reproduces in Dyalog 20.0.50409 64-bit Unicode, BuildID 6def4920
⍝ 20.0 with Link 4.0.20

)ed d:\tmp\myclass2.aplc

⍝ I add a blank line and press Escape to

⍝ I edit and set a breakpoint in ⎕se.Link.U.GetAplSource[43]

GetAplSource[43]

  )si

⎕SE.Link.U.GetAplSource[43]*
⎕SE.Link.OnFix[14]
⎕SE.SALTUtils.EditorFix[30]
⎕DQ

  ns

#.[Namespace]

  name

d:\tmp\Noodle.aplc

  nc

1

  ns NameClass name

¯1

  nc

1