Issues with SVG path data that relies on accurate floating points values. about canvas-5-polyfill HOT 1 CLOSED

Here is a version where I hacked together the parseFloat function peg$c39 around line 152 to handle my example data correctly. There probably is a cleaner way, but as a workaround for my usecase this seems to do the trick:
http://jsfiddle.net/z1mxLnp7/1/

It seems the default code works out like this:
parseFloat(["-",[["3",".","125"],null]].join(""))
=> parseFloat("-3,.,125,") // I am surprised that parseFloat accepts that kind of string
=> -3

EDIT:
As expected my hackery does't solve it for all cases, something is still wrong for example with this data:
http://jsfiddle.net/z1mxLnp7/2/

EDIT: It seems that is an issue created by the fact that the path uses only relative m's.
Something breaks when it switches from one subpath to another.

created another issue for the relative positions bug: #3

from canvas-5-polyfill.