cleanupIDs breaks this svg

[amyspark]

svgo version: 0.7.2

When I minify the following svg:

<?xml version="1.0" encoding="UTF-8"?>
<svg id="RSSicon" version="1.1" viewBox="0 0 16 16" 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#">
 <metadata>
  <rdf:RDF>
   <cc:Work rdf:about="">
    <dc:format>image/svg+xml</dc:format>
    <dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage"/>
    <dc:title/>
   </cc:Work>
  </rdf:RDF>
 </metadata>
 <defs>
  <linearGradient id="RSSa" x1="30.06" x2="225.94" y1="30.06" y2="225.94" gradientUnits="userSpaceOnUse">
   <stop stop-color="#E3702D" offset="0"/>
   <stop stop-color="#EA7D31" offset=".107"/>
   <stop stop-color="#F69537" offset=".35"/>
   <stop stop-color="#FB9E3A" offset=".5"/>
   <stop stop-color="#EA7C31" offset=".702"/>
   <stop stop-color="#DE642B" offset=".887"/>
   <stop stop-color="#D95B29" offset="1"/>
  </linearGradient>
 </defs>
 <g transform="scale(.0625)" stroke-width="16">
  <rect width="256" height="256" rx="55" ry="55" fill="#cc5d15"/>
  <rect x="5" y="5" width="246" height="246" rx="50" ry="50" fill="#f49c52"/>
  <rect x="10" y="10" width="236" height="236" rx="47" ry="47" fill="url(#RSSa)"/>
  <g fill="#fff">
   <circle cx="68" cy="189" r="24"/>
   <path d="M160 213h-34a82 82 0 0 0-82-82V97a116 116 0 0 1 116 116z"/>
   <path d="M184 213A140 140 0 0 0 44 73V38a175 175 0 0 1 175 175z"/>
  </g>
 </g>
</svg>

with the option cleanupIDs enabled, one gets the following file:

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><defs><linearGradient id="RSSa" x1="30.06" x2="225.94" y1="30.06" y2="225.94" gradientUnits="userSpaceOnUse"><stop offset="0" stop-color="#E3702D"/><stop offset=".107" stop-color="#EA7D31"/><stop offset=".35" stop-color="#F69537"/><stop offset=".5" stop-color="#FB9E3A"/><stop offset=".702" stop-color="#EA7C31"/><stop offset=".887" stop-color="#DE642B"/><stop offset="1" stop-color="#D95B29"/></linearGradient></defs><g stroke-width="16" transform="scale(.0625)"><rect width="256" height="256" fill="#cc5d15" rx="55" ry="55"/><rect width="246" height="246" x="5" y="5" fill="#f49c52" rx="50" ry="50"/><rect width="236" height="236" x="10" y="10" fill="url(#RSSa)" rx="47" ry="47"/><g fill="#fff"><circle cx="68" cy="189" r="24"/><path d="M160 213h-34a82 82 0 0 0-82-82V97a116 116 0 0 1 116 116z"/><path d="M184 213A140 140 0 0 0 44 73V38a175 175 0 0 1 175 175z"/></g></g></svg>

If I view the file standalone, it displays OK.
If I embed it in a web page, the gradient inside the RSS symbol is not shown.

This is the svgo.yml file I am using:

# minify without compressing
plugins:

  # - name
  #
  # or:
  # - name: false
  # - name: true
  #
  # or:
  # - name:
  #     param1: 1
  #     param2: 2

  - removeDoctype: true
  - removeXMLProcInst: true
  - removeComments: true
  - removeMetadata: false
  - removeXMLNS: false
  - removeEditorsNSData: true
  - cleanupAttrs: true
  - minifyStyles: true
  - convertStyleToAttrs: true
  # BREAKS CC DO NOT ENABLE
  - cleanupIDs: true
  - removeRasterImages: true
  - removeUselessDefs: true
  - cleanupNumericValues: true
  - cleanupListOfValues: true
  - convertColors: true
  - removeUnknownsAndDefaults: true
  - removeNonInheritableGroupAttrs: true
  - removeUselessStrokeAndFill: true
  - removeViewBox: true
  - cleanupEnableBackground: true
  - removeHiddenElems: true
  - removeEmptyText: true
  - convertShapeToPath: true
  - moveElemsAttrsToGroup: true
  - moveGroupAttrsToElems: true
  - collapseGroups: true
  - convertPathData: true
  - convertTransform: true
  - removeEmptyAttrs: true
  - removeEmptyContainers: true
  - mergePaths: true
  - removeUnusedNS: true
  # ERROR WITH GITHUB
  - transformsWithOnePath: false
  - sortAttrs: true
  - removeTitle: true
  - removeDesc: true
  - removeDimensions: true
  - removeAttrs: true
  - removeElementsByAttr: true
  - addClassesToSVGElement: false
  - removeStyleElement: true
  - removeScriptElement: true
  - addAttributesToSVGElement: false

[amyspark]

It's not svgo, it's a bad interaction between two SVGs. See #674.

[JoshyPHP]

For future reference, this was most likely a naming collision, e.g. another element using id="RSSa".