a statement can have 6 numbers

[JonnyBurger]

const d = 'M418 430.8c-1.3.2-3 1.1-3.8 2-.7 1-1.1 1.1-.7.4.4-.9-.8-1.2-4.7-1.3-12.7-.4-19.6 0-24.5 1.3-3.2.9-5.3 1.1-5.3.5 0-1.4-12.2 0-13.1 1.5-1.1 1.7-3.9.1-3.9-2.1 0-1.8-.3-1.9-2.7-1-1.6.6-4.9 1.2-7.5 1.4-3.2.2-4.6-.1-4.1-.8.3-.6.1-.7-.6-.3-.6.4-5.2.8-10.1.9-5 0-9 .4-9 .8 0 1.1-6.9 1.6-7.3.6-.4-1.3-16.9-1.7-18.5-.4-.8.6-2.3 1.2-3.5 1.2-1.1.1-2.3.7-2.5 1.3-.1.5-1.3 2.1-2.5 3.4-1.2 1.4-4.3 4.8-6.9 7.7-2.7 2.8-4.8 5.4-4.8 5.6 0 .2-1.5 2.7-3.4 5.5-1.9 2.9-4.5 7.8-5.7 10.9-1.2 3.1-2.8 7.2-3.6 9.1-.8 1.9-1.9 4.4-2.3 5.5-1.2 3-2 7.1-3 15.5-1.6 14.5-1.8 21-.6 21.7.6.3.8.3.4-.1-.3-.4.2-1.5 1.1-2.4 1-.9 3.4-3.2 5.4-5.1 2.3-2.2 5.1-3.6 7.9-4.1 2.4-.5 5-.4 6 .1 1.2.7 1.8.6 1.8-.1 0-.6.5-.8 1-.5.6.4.8.9.6 1.3-.2.4 1.9.7 4.7.7 2.9 0 5.7.5 6.2 1.2.6.6 2.6 1.4 4.5 1.7 6.4.9 11 2.7 12 4.6 1.1 2 1.4 5.7.4 4.7-.6-.6-1.8.2-5.7 3.8a6.69 6.69 0 01-5.1 1.6c-1.7-.2-3.5-.9-4.1-1.6-.7-1-5.4-1.7-15.5-2.3-13.2-.8-14.9-.7-19.1 1-2.6 1.1-5.8 3.1-7.2 4.6-2.1 2.3-2.6 3.9-3 10.7-.2 4.4-.8 8.9-1.2 9.9-.6 1.4-.5 1.7.3 1.2s1.2.3 1.2 2.6c0 1.8-.5 6.2-1.1 9.8-.6 3.6-1 7.4-1 8.5.1 1.1-.3 4.7-.9 8-1.4 8.6-1.9 18.5-2.5 49.5-.4 22.3-.2 29 1 35.5.9 4.4 2.3 10.2 3.3 13 2.6 7.8 11.6 25.5 15.3 30.5 1.9 2.5 6.1 8.3 9.4 13 5.9 8.5 17.8 23.5 22.2 27.8 1.3 1.3 2.3 3.3 2.3 4.5 0 1.2 2.3 10.8 5.1 21.2 2.9 10.5 5.4 20.6 5.6 22.5.3 1.9 1.1 5 1.9 6.8.9 1.8 2 6 2.6 9.2 1 5.3.9 6.4-.8 9.7-1 2.1-3.1 5.9-4.6 8.6-1.6 2.6-2.8 5.7-2.8 6.7 0 2-3 9.1-4.2 10-1.1.9-3.7 12.9-3.2 15.3.2 1.2.8 3.1 1.3 4.2s2.3 4.9 3.9 8.5c1.6 3.6 5.1 8.6 7.6 11.3 5.1 5.1 13.8 10 20.1 11.2 2.2.4 5.1 1 6.5 1.3 3.8.8 18.9.5 24.5-.6 12.9-2.6 19.9-4.4 27.2-7.2 4.3-1.7 9.4-3.8 11.3-4.7 1.9-.9 3.7-1.7 4-1.8.3-.1 1.6-.7 3-1.2 1.4-.6 6.8-2.7 12-4.7 10.5-4 18.3-7.7 18.8-8.9.2-.4.8-.7 1.3-.7s2.9-1.8 5.1-4c2.3-2.2 5-4 6-4s1.8-.3 1.8-.8c0-.4 3.1-3.2 6.9-6.2 3.8-3 7.2-6.4 7.5-7.5.3-1.1 2.1-4.4 4.1-7.3 3.6-5.5 12.3-22.1 14.8-28.2.8-1.9 2.2-6.2 3.2-9.4 1.1-3.9 1.4-7.5 1-10.2-.3-2.5-2-6-3.9-8.6-1.8-2.4-3.1-4.8-2.9-5.5.3-.7-1.1-1.9-3-2.6-6.5-2.8-11.7-13.2-14.2-28.7-2.3-13.6-2.3-38.5-.2-49.5 1.6-8.1 5-23 6.8-29.7.9-3.5 1.1-3.7 3.5-2.8 1.4.6 3.8 1 5.3 1 3.9 0 9.2-2.3 11.7-5.2 2.7-3.1 8.5-12.3 10.7-17.3 1.1-2.2 2.8-7.1 3.8-10.8 1.1-3.8 3.5-10 5.5-13.8 1.9-3.9 4.4-9.8 5.4-13.2 1.2-3.6 2-9.1 2-13.1 0-9.4-2.5-19.4-5.9-22.9-2.3-2.6-3.1-2.8-7.2-2.4-2.5.3-6.2 1.5-8.2 2.7-2 1.2-3.7 1.9-3.7 1.5 0-1.1-8.6 7.8-9.8 10.1-.5 1.1-1.3 4.7-1.7 8.1-.4 3.8-1.2 6.4-2.1 6.7-.7.3-1.6.1-1.9-.4-.4-.6-.1-1 .5-1s.8-.5.4-1.1c-1.2-2-2.6-8.3-3.4-15.4-.4-3.9-1.3-12.9-1.9-20-1.6-17.8-3-26.3-4.7-28-.8-.7-1.4-2-1.4-2.8 0-.7-.3-1.7-.7-2.1-.9-.8-1.2-2.6-1.7-9.6-.9-10.2-.9-13.6-.4-14.5.3-.6.4-2.4.1-4-1.1-7.1-1.1-8.4.1-7.9.9.4 1-1.2.4-6.3-1.4-11.1-1.9-16.6-1.9-19.3.1-3.2-2.8-11-4-11-.5 0-.9-.9-.9-2s-.4-2-.9-2c-.6 0-2-1.8-3.2-4-1.2-2.2-3.1-4.2-4-4.5-1-.3-2.1-1.4-2.4-2.4-.6-1.9-6.5-5.1-9.5-5.1-1 0-2.2-.5-2.5-1-.3-.6-1.5-1-2.6-1s-2.6-.6-3.4-1.3c-.9-.9-2.9-1.2-6.8-.7-3.1.3-5.4.3-5.2-.1.4-.6-3.1-.7-7.5-.1zm16.9 83.9c1 1.2 3 2.7 4.3 3.4 1.4.6 4.2 3.1 6.2 5.4 2 2.4 3.6 4.7 3.6 5 0 .4-.7.5-1.5.2-.8-.4-1.7-.2-2 .3-.3.5-2.6 0-5.1-1.1-4.8-2.2-7.2-2.8-11.7-3.4-2.1-.2-2.6 0-1.8.8 2 2 1.1 3-2.1 2.3-6.6-1.4-7.4-1.6-13.3-2-4.9-.3-6.5 0-8.9 1.7-1.6 1.2-2.6 1.6-2.2.9 1.1-1.9-5.9-1.5-7.5.4-.7.8-2 1.3-3 1.1-.9-.3-2.3-.1-3 .4-.7.4-2.1.3-3-.2-1.2-.6-2-.5-2.5.2-.4.7-1 .7-1.6.1-.6-.6-2.2-.7-4.1-.1-2.4.7-3.3.5-4-.6-.4-.9-1.3-1.2-1.9-.9-.8.5-.9.1-.5-1.1.4-.9.2-2.4-.4-3.2-.9-1-.9-2-.1-3.8.6-1.3 2.3-3.2 3.8-4.2 2.2-1.4 4.5-1.7 11.8-1.5 6.2.2 10.4-.2 13.1-1.2 2.9-1 8.2-1.4 19.8-1.3 15.2.1 15.9.2 17.6 2.4zm-20.2 38.5c4.2.7 7.6 2 10.3 3.9 4.1 3 4.1 3 1.1 5.4-1.6 1.4-3.7 2.5-4.7 2.5-1.1 0-2.8.7-3.8 1.5-2.6 2-12.2 1.9-16 0-1.5-.8-3.9-1.5-5.1-1.5-2.5 0-4.8-1.8-6.6-5.2-1-1.8-.8-2.4 1.2-3.9 1.3-1 3.1-1.9 3.9-1.9.8 0 2.4-.7 3.5-1.6 2.1-1.5 2.3-1.5 16.2.8zm-107.9-.2c2.5 0 3.5.5 3.9 1.9.2 1 1.5 2.3 2.8 2.9 2.9 1.3 4.3 5.1 2.4 6.3-.8.5-2.2.9-3.1.9-1 0-1.8.4-1.8 1 0 1.6-4.1 3.2-9.4 3.5-2.8.2-5.7-.2-6.3-.7-.7-.6-2-.7-2.9-.4-2.2.8-6.5-1.1-8.6-3.9-1.4-1.8-1.5-3-.7-5.7.8-3.2 1.4-3.6 7.2-5.1 3.4-.9 7.8-1.4 9.7-1.2 1.9.3 5 .5 6.8.5zM320 657.5c1.4.9 7.1 1.5 6.6.7-.2-.4 4.9-.7 11.5-.7 6.5 0 11.9.2 11.9.5 0 .4 3.5 1.4 7.8 2.4 4.2.9 9.1 2.1 10.7 2.6 1.7.5 5.7 1.4 9 2 3.3.7 7.6 2.1 9.6 3.1s4.8 1.9 6.3 1.9c1.8 0 2.4.4 2 1.5-.4.8-1.6 1.5-2.8 1.5-2.2 0-7.7 3.2-7.9 4.6-.1.5-1.2 1.9-2.6 3.1-1.3 1.3-3.3 2.3-4.3 2.3-1.1 0-3.4.7-5.1 1.6-1.8.9-3.9 2-4.7 2.3-1.3.5-17.6.6-36.5.1-2.7-.1-8 0-11.7.1-5.1.2-7.3-.2-9.5-1.6-1.5-1.1-3.4-1.8-4.2-1.7-.7.2-1-.1-.6-.7.3-.6-.1-1.1-.9-1.1s-2-1-2.7-2.1c-.7-1.5-.8-1.9 0-1.5.7.5.9.1.5-.8-.3-.9-1-1.6-1.6-1.6-.5 0-2.2-1.5-3.9-3.2-1.6-1.8-2.9-2.9-2.9-2.5 0 .4-.6.2-1.4-.5-.8-.7-1.2-1.6-.9-2.1.2-.4 1.6-.7 3-.7 1.5 0 3.6-.9 4.8-2 1.1-1.1 3.1-2.1 4.3-2.3 1.2-.2 2.5-.6 2.8-1 .4-.4 1.4-.7 2.1-.7.8 0 2.5-1.1 3.8-2.4 2.3-2.3 4.9-2.7 7.5-1.1z'

new svgPathProperties(d).getTotalLength()

Results in Error: Malformed path data: "a" must have 7 elements and has 6: a6.69 6.69 0 01-5.1 1.6.

Apparently it is valid SVG, it is rendered by Chrome.

If I change the validation, it works:

-  a: 7,
+  a: 6,

I'll send a PR for it.

[kyelewis]

I've just come across this, the issue seems to be that some svg generators assume that boolean flags need no separators between values.

In the above example:
a6.69 6.69 0 01-5.1 1.6.

is equivalent to a6.69 6.69 0 0,1-5.1 1.6.

[rveciana]

Do you think it's worth accepting this strange a version?

[kyelewis]

The cause in our case i've determined to be SVGO.

SVGO feels that it is a correct interpretation of the specs - see svg/svgo#1137

I'm happy enough working around it given that i know what's causing it now, but if svg-path-properties is implementing SVG 1.1 then it sounds like it's part of the spec (it wasn't in SVG 1.0).

elliptical-arc-argument:
    nonnegative-number comma-wsp? nonnegative-number comma-wsp? 
        number comma-wsp flag comma-wsp? flag comma-wsp? coordinate-pair

Our path to coming across this issue was using svgr to convert svg to tsx for react / react-native- when importing them in to react-native-svg-animations, we get this error (because it uses svg-path-properties under the hood).

It looks like a pretty decent amount of work to the parser though for a somewhat specific, workaroundable scenario, so I wouldn't blame you for not making a change here (i also don't think i'd have time to write a PR for this either).