constant folding percision issue

Link to .capx file (required!):

dl.dropboxusercontent.com/u/5426011/bug/bug_constant_folding.capx

Steps to reproduce:

1. Run capx.

Observed result:

Global variables a and b have different values.

"a" is set to 64999966 / 1000000 and later reads as 65.

"b" is set to 64999966*one / 1000000 and reads as 64.999966.

"one" is a global set to 1 to bypass "constant folding".

Expected result:

I would expect both expressions to evaluate to 64.999966 and not just b.

Browsers affected:

Chrome: yes

Firefox: yes

Internet Explorer: untested

Operating system & service pack:

Windows vista sp2

Construct 2 version:

r155

JFYI, I was testing this on IE11 yesterday with the same results

Thanks, should be fixed in the next build.

Ashley - would you mind sharing what was wrong and the fix? It seems like it was a rounding error and could be useful to keep in mind as a javascript programmer

Fimbul - it wasn't actually the constant folder or JS. It was the stringstream (in C++) that writes the project data to javascript - by default the stream double-to-text converter had a precision of 6 decimal places, which would round some values. Upping it to 16 decimal places fixed the problem.