Specific SVG causes SVGO to fail: TypeError: Cannot read properties of undefined (reading '0') Edit: Bug is worse than I thought, SVGO corrupts all SVGs before encountering the invalid SVG. about svgo HOT 3 OPEN

Update to this issue. The severity is much higher than I thought.

I found another SVG causing SVGO to fail, but the terrible part is when I process a folder of SVGs that also contains the "bad" SVG using svgo -r -f 'C:\Icons\SomeFolderWithSVGs\', SVGO deletes all data from valid SVGs up until it reaches the "bad" SVG. So it's corrupting completely valid SVGs and causing data loss.

Here is a zip file of SVGs:

Microsoft Docons.zip

The "bad" SVG in this collection is brand-instagram-65369.svg

1. Extract the zip somewhere, I.E. C:\Microsoft Docons\
2. Open a terminal and enter svgo -r -f 'C:\Microsoft Docons\'
3. You should see the same error I pasted in my first post.
4. Open C:\Microsoft Docons\, and observe that these (valid) SVGs are now empty files:

.notdef-1114112.svg
arrow-down-65312.svg
arrow-down8-61614.svg
arrow-left-65313.svg
arrow-right-65305.svg
arrow-swap-65392.svg
arrow-up-left-65304.svg
arrow-up-right-61545.svg
arrow-up8-61613.svg
asterisk-59960.svg
asterisk-solid-62285.svg
backpack-65413.svg
blog-61995.svg
book-art64-61204.svg
book-open-65382.svg
book-solid-65365.svg
brand-dev-to-65368.svg
brand-facebook-65300.svg
brand-github-65302.svg

Definitely a pretty nasty bug. Having SVGO choke on a file is one thing, but corrupting other valid files is pretty awful.

Hopefully there is a resolution to this.

from svgo.

SVGO deletes all data from valid SVGs

I believe this is due to how Node handles the priority of events and stuff.

Cannot read properties of undefined (reading '0')

Duplicate of #1926, also see comments on #1927

from svgo.

SVGO deletes all data from valid SVGs

I believe this is due to how Node handles the priority of events and stuff.

Can you elaborate on this? Is there any way to mitigate this behavior? I can't safely use SVGO in production if there is a chance that somewhere in the pipeline valid data gets wiped out.

Cannot read properties of undefined (reading '0')

Duplicate of #1926, also see comments on #1927

Read the comments, glad to hear a fix is in the works.

from svgo.