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Improve the error message when an import cannot be resolved #4023

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Merged
merged 1 commit into from
Mar 25, 2025
+8 −3
Merged

Improve the error message when an import cannot be resolved #4023

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11 changes: 8 additions & 3 deletions lib/src/model/prefix.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -36,9 +36,14 @@ class Prefix extends ModelElement with HasNoPage {
.firstWhere((i) => i.prefix2?.element == element);
var importedLibrary = libraryImport.importedLibrary2;
if (importedLibrary == null) {
throw StateError(
'Unexpected null LibraryElement2 for imported library at '
'${libraryImport.uri}');
var message = 'Unexpected null LibraryElement2 for imported library at '
'${library.element.firstFragment.source.uri}, at offset '
'${libraryImport.importKeywordOffset}';
var directiveUri = libraryImport.uri;
if (directiveUri is DirectiveUriWithRelativeUriString) {
message += 'for import URI: "${directiveUri.relativeUriString}"';
}
throw StateError(message);
}
return importedLibrary;
}
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