syntax errors in mysources.list get ignored

[guillep]

Describe the bug I have a mysources.list. I had a syntax error (a comma missing between two templates that I copy pasted). The launcher ignored it but did not report it.

Buggy:

OrderedCollection [
    PhLTemplateSource {
        #type : #HttpListing,
        #name : 'Pharo 12.0 posta',
        #url : 'https://files.pharo.org/image/90/',
                #filterPattern : 'href="(Pharo-?12(.0)?-SNAPSHOT.build.[^"]*.zip)"'
    }
    PhLTemplateSource {
        #type : #HttpListing,
        #name : 'Pharo 9.0 (stable)',
        #url : 'https://files.pharo.org/image/90/',
                #filterPattern : 'href="(Pharo-?9.0-SNAPSHOT.build.[^"]*.zip)"'
    }
]

Fixed:

OrderedCollection [
    PhLTemplateSource {
        #type : #HttpListing,
        #name : 'Pharo 12.0 posta',
        #url : 'https://files.pharo.org/image/90/',
                #filterPattern : 'href="(Pharo-?12(.0)?-SNAPSHOT.build.[^"]*.zip)"'
    },
    PhLTemplateSource {
        #type : #HttpListing,
        #name : 'Pharo 9.0 (stable)',
        #url : 'https://files.pharo.org/image/90/',
                #filterPattern : 'href="(Pharo-?9.0-SNAPSHOT.build.[^"]*.zip)"'
    }
]

Expected behavior reporting the error to the user somehow