Skip file check existence for source generated file (#1091)

Skip file check existence for source generated file

Author: MarcoRossignoli

src/coverlet.core/Helpers/InstrumentationHelper.cs

@@ -125,7 +125,8 @@ public bool EmbeddedPortablePdbHasLocalSource(string module, out string firstNot
                                 // We verify all docs and return false if not all are present in local
                                 // We could have false negative if doc is not a source
                                 // Btw check for all possible extension could be weak approach
-                                if (!_fileSystem.Exists(docName))
+                                // We exlude from the check the autogenerated source file(i.e. source generators)
+                                if (!_fileSystem.Exists(docName) && !docName.EndsWith(".g.cs"))
                                 {
                                     firstNotFoundDocument = docName;
                                     return false;
@@ -172,7 +173,8 @@ public bool PortablePdbHasLocalSource(string module, out string firstNotFoundDoc
                             // We verify all docs and return false if not all are present in local
                             // We could have false negative if doc is not a source
                             // Btw check for all possible extension could be weak approach
-                            if (!_fileSystem.Exists(docName))
+                            // We exlude from the check the autogenerated source file(i.e. source generators)
+                            if (!_fileSystem.Exists(docName) && !docName.EndsWith(".g.cs"))
                             {
                                 firstNotFoundDocument = docName;
                                 return false;