2 different compiler errors with the same code

[#NULL]

With the code from the first post in this german forum thread:
Makro mit CompilerIf als Code

- open IDE, paste code, run, get error:

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Zeile 29: 'CompilerIf' without 'CompilerEndIf'.

- then change the 0 to 1, run (no error), then undo back to 0 and run again, getting error:

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Zeile 23: 'CompilerEndIf' without 'CompilerIf'.

PB 5.71 x64 Linux; someone confirmed it on Windows as well.
I'm not referring to the misused nesting of macros and compilerIfs, but only to the fact of getting 2 different errors with the same code. I don't know if that issue matters much, but maybe it exposes a possible problem in the compiler's (or the IDE's) caching/precompiling.

[Naheulf]

Tip:

- add a plus char "+" line 7 (at the end of "DebugIf" macro content), run, get error:

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Line 21: Syntax error.

- then remove the "+", run, get the first error again :

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Zeile 29: 'CompilerIf' without 'CompilerEndIf'.