In the following code

twidth = 2.0      // Width of teeth
smooth = 50 ;      // circle smoothing, higher is smoother but slower

The error is reported on the second line, with the red box positioned just
before the = sign.  The actual error is of course the missing ";" on the
first line.

version 2014.12.25 (git 73163f2), 32 bit Win XP

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That is actually the correct handling of these kind of errors.

Remember that newlines are actually ignored in the code. Here is an example
that is valid;

test

20
;
word

"test"
;

If the first ; is removed then 'word' is the first place in the code where
the syntax is wrong, and that is where the error will pop up.

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OK then let me rephrase the comment.

Given that the construction <var> = <constant> <var> is syntactically
incorrect, the scanner should position the red box /before /the second var
rather than after it since the most likely assumption is that something
should have appeared between the constant and the second var, like an
operator or a ";".  IMHO.  Not a big deal.

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