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Error: infinite loop while processing mergePaths plugin. #987

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JoKalliauer opened this issue Jun 22, 2018 · 4 comments
Closed

Error: infinite loop while processing mergePaths plugin. #987

JoKalliauer opened this issue Jun 22, 2018 · 4 comments

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@JoKalliauer
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JoKalliauer commented Jun 22, 2018 •
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Prozessing File:Pereslavl_narrow_gauge_railway_1990.svg with

svgo -i Pereslavl_narrow_gauge_railway_1990.svg -o output.svg --pretty --indent=1 --disable=convertPathData

leads to

Error: infinite loop while processing mergePaths plugin.

input.svg.txt
input

output.svg.txt
output
@GreLI
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GreLI commented Jun 23, 2018

There is a fixed limit to prevent infinite loop. Perhaps file is just too large. Generally I'd recommend to disable mergePaths on a such big files. (Should make an option to force.)

@JoKalliauer JoKalliauer mentioned this issue Jun 23, 2018
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@JoKalliauer
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I see it the other way round.

For small files (source-code fits on ~one screen) svgoptimizers are useful to make the code better readable. Merging Path might be unwanted, because they might be two different objects, and after merging it is difficult to find the right part of the source-code.

For big files (~30MB, f.e Category:Large_SVG_files) svgoptimizers can be used to reduce the file-size. mergePath is therefore a useful tool. (Also it leads to long processing times.)
Reducing file-size might be necessary to be able to create a png or to render in a browser.

In Jan.2018 I used this tool to merge 483840 lines in File:1_42_polytope_7-cube.svg to one path. and I did not get such an error-messages. (Maybe there was an update between?)

@JoKalliauer
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I shortend the example just to two pathes:

I used:

svgo -i input.svg.txt -o output.svg --pretty --indent=1 --disable=convertPathData -p 10

and I still get the error:
Error: infinite loop while processing mergePaths plugin.

input.svg.txt

<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" width="840.99mm" height="345.1mm" fill="none" fill-rule="evenodd" stroke="#000" stroke-linecap="square" stroke-linejoin="bevel" version="1.1" viewBox="0 0 9933 4076">
  <g stroke-width="11.81" fill="#000" fill-rule="nonzero" stroke="#fff">
   <path d="m4948.6 1499.9c0 1.23-.232 2.31-.697 3.237-.465.93-1.09 1.7-1.876 2.308-.93.73-1.95 1.25-3.063 1.561-1.11.31-2.53.465-4.242.465h-9.895v-24.72h8.733c1.82 0 3.19.069 4.126.208.935.138 1.81.429 2.631.872.885.476 1.55 1.11 1.984 1.909.437.797.656 1.72.656 2.756 0 1.21-.302 2.28-.905 3.221s-1.44 1.63-2.499 2.075v.133c1.53.321 2.75.977 3.669 1.967.919.991 1.38 2.33 1.378 4.009m-7.952-10.16c0-.398-.102-.808-.307-1.229s-.523-.725-.955-.913c-.41-.177-.894-.274-1.453-.291s-1.39-.025-2.499-.025h-.432v5.23h.78c1.06 0 1.81-.011 2.233-.033s.866-.138 1.32-.349c.498-.232.841-.553 1.029-.963s.282-.886.282-1.428m1.561 10.044c0-.764-.155-1.36-.465-1.793s-.775-.758-1.395-.98c-.376-.144-.894-.224-1.552-.241s-1.54-.025-2.648-.025h-1.146v6.192h.332c1.62 0 2.73-.011 3.354-.033s1.25-.172 1.893-.448c.564-.243.977-.6 1.237-1.071.26-.47.39-1 .39-1.602m18.833 8.185c-3.52 0-6.22-.841-8.093-2.523-1.88-1.68-2.81-4.08-2.814-7.189 0-3.04.874-5.47 2.623-7.288 1.75-1.82 4.19-2.72 7.338-2.723 2.86 0 5 .769 6.441 2.308s2.16 3.74 2.158 6.607v2.092h-12.733c.055.863.238 1.59.548 2.167a3.8 3.8 0 001.229 1.386c.498.343 1.08.589 1.743.739a9.94 9.94 0 002.175.224 8.92 8.92 0 001.992-.224 9.618 9.618 0 001.793-.589 12.934 12.934 0 002.308-1.328h.614v4.798c-.476.188-.91.362-1.303.523s-.932.324-1.619.49c-.631.166-1.28.296-1.951.39-.67.094-1.49.141-2.449.141m1.926-12.219c-.033-1.23-.318-2.16-.855-2.806-.537-.642-1.36-.963-2.465-.963-1.13 0-2.01.338-2.648 1.013-.636.675-.988 1.59-1.054 2.756zm3.304-9.579h-4.765v-4.532h4.765zm-7.985 0h-4.765v-4.532h4.765zm31.621 21.3h-6.69l-4.416-7.388h-1.494v7.388h-5.811v-18.644h5.811v7.487c.819-.011 1.43-.13 1.834-.357s.844-.827 1.32-1.801c.155-.332.321-.697.498-1.096.177-.398.338-.753.481-1.063.587-1.23 1.31-2.07 2.167-2.523.858-.454 1.9-.681 3.129-.681.432 0 .841.006 1.229.017.387.011.664.017.83.017v4.981h-1.129c-.354 0-.672.069-.955.208a2.756 2.756 0 00-.739.523c-.21.221-.368.443-.473.664l-.307.648a39.53 39.53 0 01-.565 1.278c-.122.255-.338.504-.647.747zm11.736.498c-1.54 0-2.95-.194-4.225-.581s-2.39-.985-3.329-1.793c-.93-.808-1.65-1.82-2.175-3.046-.52-1.22-.78-2.66-.78-4.325 0-1.78.282-3.3.847-4.549.564-1.25 1.33-2.28 2.291-3.088.93-.775 2.02-1.35 3.279-1.718 1.26-.371 2.56-.556 3.926-.556 1.03 0 2.06.119 3.088.357 1.03.238 2.06.617 3.105 1.137v4.981h-.747c-.232-.221-.517-.465-.855-.731s-.706-.509-1.104-.73a7.315 7.315 0 00-1.428-.589 6.128 6.128 0 00-1.776-.241c-1.48 0-2.63.517-3.445 1.552-.814 1.03-1.22 2.43-1.22 4.175 0 1.87.434 3.26 1.303 4.184.869.919 2.02 1.38 3.461 1.378.73 0 1.37-.083 1.926-.249s1.03-.365 1.428-.598c.387-.232.719-.473.996-.722s.515-.473.714-.672h.747v4.981l-1.154.498a9.881 9.881 0 01-1.336.465c-.564.155-1.09.274-1.585.357-.493.083-1.14.125-1.951.125m19.129-5.362v-3.885c-.985.1-1.78.185-2.391.257a8.09 8.09 0 00-1.793.423c-.509.177-.905.445-1.187.805s-.423.838-.423 1.436c0 .874.235 1.47.706 1.801s1.16.49 2.084.49c.509 0 1.03-.116 1.561-.349a4.869 4.869 0 001.444-.979m0 2.889-1.071.896c-.316.266-.739.531-1.27.797-.52.255-1.03.448-1.519.581s-1.18.199-2.067.199c-1.65 0-3.02-.553-4.109-1.66-1.09-1.11-1.64-2.5-1.635-4.184 0-1.38.277-2.5.83-3.354.553-.852 1.35-1.53 2.391-2.025 1.05-.509 2.31-.863 3.769-1.063 1.46-.199 3.03-.354 4.715-.465v-.1c0-1.03-.379-1.74-1.137-2.133s-1.9-.589-3.412-.589c-.686 0-1.49.124-2.407.374s-1.82.567-2.689.955h-.498v-4.499c.576-.166 1.51-.362 2.789-.589 1.28-.227 2.58-.34 3.885-.34 3.21 0 5.55.534 7.014 1.602 1.47 1.07 2.2 2.7 2.199 4.889v12.684h-5.777z"/>
   <path d="m4949.5 1522.8-8.5 24.72h-6.475l-8.5-24.72h6.441l5.379 16.751 5.379-16.751zm19.414 6.076-9.413 25.483h-6.242l2.822-7.288-6.84-18.195h6.109l3.918 11.688 3.669-11.688zm20.498 9.33c0 3.07-.838 5.48-2.515 7.247-1.68 1.77-4.05 2.65-7.114 2.648-3.04 0-5.41-.883-7.097-2.648-1.69-1.77-2.53-4.18-2.532-7.247 0-3.1.844-5.53 2.532-7.28 1.69-1.75 4.05-2.63 7.097-2.631 3.05 0 5.42.883 7.106 2.648 1.68 1.77 2.52 4.19 2.523 7.263m-5.96.033c0-1.11-.091-2.03-.274-2.764s-.434-1.33-.755-1.768c-.343-.465-.73-.789-1.162-.971-.432-.183-.924-.274-1.478-.274-.52 0-.991.08-1.411.241-.421.16-.808.468-1.162.921-.332.432-.598 1.02-.797 1.776s-.299 1.7-.299 2.839c0 1.14.094 2.06.282 2.764.188.703.432 1.26.73 1.685.31.432.697.747 1.162.946s.98.299 1.544.299c.465 0 .938-.1 1.419-.299a2.628 2.628 0 001.154-.896c.343-.476.603-1.05.78-1.718s.266-1.6.266-2.781m27.724 9.28h-6.906l-5.047-8.118-.896 1.212v6.906h-5.811v-25.832h5.811v14.476l5.512-7.288h6.856l-6.524 8.035zm7.018.515c-1.37 0-2.67-.149-3.893-.448-1.22-.299-2.23-.647-3.03-1.046v-4.914h.481c.277.21.592.443.946.697.354.255.847.52 1.478.797.542.255 1.15.473 1.834.656a8.52 8.52 0 002.216.274c.819 0 1.54-.127 2.167-.382.625-.255.938-.659.938-1.212 0-.432-.144-.758-.432-.979s-.847-.432-1.677-.631c-.443-.111-1-.23-1.677-.357s-1.27-.274-1.793-.44c-1.46-.454-2.56-1.13-3.295-2.017-.736-.891-1.1-2.06-1.104-3.511 0-.83.191-1.61.573-2.349.382-.736.944-1.39 1.685-1.967.742-.564 1.66-1.01 2.748-1.345 1.09-.332 2.32-.498 3.694-.498 1.31 0 2.51.13 3.603.39s2.02.573 2.773.938v4.715h-.465a10.648 10.648 0 00-.946-.623c-.432-.26-.852-.484-1.262-.672-.487-.221-1.03-.404-1.635-.548s-1.22-.216-1.851-.216c-.841 0-1.55.144-2.133.432-.581.288-.872.67-.872 1.146 0 .421.144.753.432.996s.913.482 1.876.714c.498.122 1.07.241 1.718.357s1.27.274 1.868.473c1.34.432 2.35 1.07 3.046 1.901.691.836 1.04 1.95 1.037 3.329 0 .874-.205 1.71-.614 2.499a5.64 5.64 0 01-1.743 2.001c-.797.587-1.73 1.04-2.814 1.361-1.08.321-2.37.481-3.877.481m22.599-5.379v-3.885c-.985.1-1.78.185-2.391.257a8.104 8.104 0 00-1.793.423c-.509.177-.904.445-1.187.805-.282.36-.423.838-.423 1.436 0 .874.235 1.47.706 1.801.47.326 1.16.49 2.083.49.509 0 1.03-.116 1.561-.349a4.869 4.869 0 001.444-.979m0 2.889-1.071.896c-.315.266-.739.531-1.27.797a8.58 8.58 0 01-1.519.581c-.492.133-1.18.199-2.067.199-1.65 0-3.02-.553-4.109-1.66-1.09-1.11-1.64-2.5-1.635-4.184 0-1.38.277-2.5.83-3.354.554-.852 1.35-1.53 2.391-2.025 1.05-.509 2.31-.863 3.768-1.063s3.03-.354 4.715-.465v-.1c0-1.03-.379-1.74-1.137-2.133s-1.9-.589-3.412-.589c-.686 0-1.49.124-2.407.374-.918.249-1.82.567-2.689.955h-.498v-4.499c.575-.166 1.5-.362 2.789-.589s2.58-.34 3.884-.34c3.21 0 5.55.534 7.015 1.602 1.47 1.07 2.2 2.7 2.199 4.889v12.684h-5.777z"/>
  </g>
</svg>

output.svg.txt

<svg xmlns="http://www.w3.org/2000/svg" width="840.99mm" height="345.1mm" fill="none" fill-rule="evenodd" stroke="#000" stroke-linecap="square" stroke-linejoin="bevel" viewBox="0 0 9933 4076">
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