Fingerprint prepend mysteriously added in wrong place in ONE file only

[abirtley]

Using Ember 2.8 and broccoli-asset-rev 2.5.0. I have added a prepend when in production to point to my AWS Cloudfront distribution. Everything works fine - except that one image (and no others) gets its fingerprinted URL generated incorrectly.

Here is the html code for that image:
<img src="/assets/images/agreeing.png">

And here is what was generated:
<img src="/https://testlawfirm.settify.com.au/assets/images/agreeing-b43abdb947643080f692a1dfdebc4394.png">

(Notice the unwanted "/" at the start of the URL)

Every other image works just fine, eg:
<img src="/assets/images/telephone.png">
becomes
<img src="https://testlawfirm.settify.com.au/assets/images/telephone-affbcf79f7bf3f4765496d2fcd4ae084.png">

the assetMap.json file gave me no clues:
"assets/images/agreeing.png": "assets/images/agreeing-b43abdb947643080f692a1dfdebc4394.png", "assets/images/telephone.png": "assets/images/telephone-affbcf79f7bf3f4765496d2fcd4ae084.png",

My workaround was to remove the initial / from the one offending img's src, like so:
<img src="assets/images/agreeing.png">

But I doubt this is expected behaviour, especially as every other image in my app has a src beginning with /assets/images/

For what it's worth, ember-cli-build.js contains (relevantly) the following parameters:
params.fingerprint = { enabled: true, prepend: cdnURL + "/", generateAssetMap: true }
cdnURL in this case was https://testlawfirm.settify.com.au

Unfortunately, I have no suggestions as to how this can be reproduced, since this only happens on one image and I can't see a reason why.

[abirtley]

I've figured it out - you need to be consistent in your filenames throughout the project. If in one place you write assets/images/agreeing.png but in another you write /assets/images/agreeing.png, then your second string is going to get rewritten using the rewrite value of the first string (since the first string is a subset of the second string). This leads to the incorrect slash at the start of the second rewritten URL.

I've added a suggestion in the broccoli-asset-rewrite project, and am closing this issue here.