Disabling CSS animation causes error in element inspector

[gabrgv]

Setting the pref layout.css.animation.enabled to false causes the element inspector (Right click > Inspect Element) to show a blank page.

I know nothing about troubleshooting info, but that’s what the Browser Console said:

Code: Select all

Exception {  }  
protocol.js:906
Protocol error (unknownError): Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [inIDOMUtils.getCSSValuesForProperty]  
Promise-backend.js:934

Affects both Basilisk and Pale Moon with clean profiles.

Off-topic:
Is this the right board?

Edit: More info below

I’m on Devuan GNU+Linux Daedalus (64 bit), using Nuck-TH’s AVX2 GTK2 build for Pale Moon, and official GTK2 for Basilisk.

Launching from a terminal window I get this message:

Code: Select all

console.error: 
  Message: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [inIDOMUtils.getCSSValuesForProperty]"  nsresult: "0x80004005 (NS_ERROR_FAILURE)"  location: "JS frame :: resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js :: generateCssProperties/< :: line 64"  data: no]
  Stack:
    generateCssProperties/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:64:27
generateCssProperties@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:54:17
getCSSDatabase@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:32:24
handler@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/protocol.js:1042:35
onPacket@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/main.js:1745:58
receiveMessage@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/transport/transport.js:761:18

generateCssProperties/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:64:27
generateCssProperties@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:54:17
getCSSDatabase@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:32:24
handler@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/protocol.js:1042:35
onPacket@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/main.js:1745:58
receiveMessage@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/transport/transport.js:761:18
console.error: 
  Protocol error (unknownError): Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [inIDOMUtils.getCSSValuesForProperty]

[jarsealer]

Can confirm this happens on PM 33.9.0.1 (GTK 3)

Terminal output:

Code: Select all

console.error: 
  Message: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [inIDOMUtils.getCSSValuesForProperty]"  nsresult: "0x80004005 (NS_ERROR_FAILURE)"  location: "JS frame :: resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js :: generateCssProperties/< :: line 64"  data: no]
  Stack:
    generateCssProperties/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:64:27
generateCssProperties@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:54:17
getCSSDatabase@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:32:24
handler@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/protocol.js:1042:35
onPacket@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/main.js:1745:58
receiveMessage@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/transport/transport.js:761:18

generateCssProperties/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:64:27
generateCssProperties@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:54:17
getCSSDatabase@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/css-properties.js:32:24
handler@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/protocol.js:1042:35
onPacket@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/main.js:1745:58
receiveMessage@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/transport/transport.js:761:18
console.error: 
  Protocol error (unknownError): Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [inIDOMUtils.getCSSValuesForProperty]

[Moonchild]

Moved to platform development as it would affect any browser building on UXP with devtools.

[gabrgv]

Same thing setting layout.css.transition.enabled to false.

[Moonchild]

Filed Issue #2860 (UXP)