Allow nil pointer dereference error instead of hidden it

.golangci.yml

@@ -17,7 +17,7 @@ run:
   # If false (default) - golangci-lint acquires file lock on start.
   allow-parallel-runners: true
 
-  skip-dirs:
+  exclude-dirs:
     - test/testdata_etc # test files
     - internal/cache # extracted from Go code
     - internal/renameio # extracted from Go code
@@ -31,7 +31,7 @@ run:
 # output configuration options
 output:
   # Format: colored-line-number|line-number|json|colored-tab|tab|checkstyle|code-climate|junit-xml|github-actions|teamcity
-  Format: colored-line-number
+  Formats: colored-line-number
   # Multiple can be specified by separating them by comma, output can be provided
   # for each of them by separating format name and path by colon symbol.
   # Output path can be either `stdout`, `stderr` or path to the file to write to.
@@ -153,7 +153,7 @@ linters-settings:
   govet:
     disable:
       - sigchanyzer
-    check-shadowing: true
+    shadow: true
     settings:
       printf:
         funcs:

go.mod

@@ -6,6 +6,7 @@ require github.com/stretchr/testify v1.8.4
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,5 +1,7 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=

of.go

@@ -31,24 +31,13 @@ func (n *Of[T]) GetValue() *T {
 
 // SetValue implements the setter.
 func (n *Of[T]) SetValue(b T) {
-	if n == nil {
-		n = new(Of[T])
-		n.SetValue(b)
-
-		return
-	}
-
 	n.Val = &b
 }
 
 // SetValueP implements the setter by pointer.
 // If ref is not nil, calls SetValue(*ref)
 // If ref is nil, calls SetNull()
 func (n *Of[T]) SetValueP(ref *T) {
-	if n == nil {
-		n = new(Of[T])
-	}
-
 	if ref != nil {
 		n.SetValue(*ref)
 	} else {
@@ -59,7 +48,7 @@ func (n *Of[T]) SetValueP(ref *T) {
 // SetNull set to null.
 func (n *Of[T]) SetNull() {
 	if n == nil {
-		panic("calling SetNull on nil receiver")
+		return
 	}
 
 	n.Val = nil