How to use Load method of main Package

Best Syzkaller code snippet using main.Load

loader_test.go

Source:loader_test.go Github

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...91 t.Errorf("FromArgs(%q) = %+v, want %+v", test.args, got, test.want)92 }93 }94}95func TestLoad_NoInitialPackages(t *testing.T) {96 var conf loader.Config97 const wantErr = "no initial packages were loaded"98 prog, err := conf.Load()99 if err == nil {100 t.Errorf("Load succeeded unexpectedly, want %q", wantErr)101 } else if err.Error() != wantErr {102 t.Errorf("Load failed with wrong error %q, want %q", err, wantErr)103 }104 if prog != nil {105 t.Errorf("Load unexpectedly returned a Program")106 }107}108func TestLoad_MissingInitialPackage(t *testing.T) {109 var conf loader.Config110 conf.Import("nosuchpkg")111 conf.Import("errors")112 const wantErr = "couldn't load packages due to errors: nosuchpkg"113 prog, err := conf.Load()114 if err == nil {115 t.Errorf("Load succeeded unexpectedly, want %q", wantErr)116 } else if err.Error() != wantErr {117 t.Errorf("Load failed with wrong error %q, want %q", err, wantErr)118 }119 if prog != nil {120 t.Errorf("Load unexpectedly returned a Program")121 }122}123func TestLoad_MissingInitialPackage_AllowErrors(t *testing.T) {124 if runtime.Compiler == "gccgo" {125 t.Skip("gccgo has no standard library test files")126 }127 var conf loader.Config128 conf.AllowErrors = true129 conf.Import("nosuchpkg")130 conf.ImportWithTests("errors")131 prog, err := conf.Load()132 if err != nil {133 t.Errorf("Load failed unexpectedly: %v", err)134 }135 if prog == nil {136 t.Fatalf("Load returned a nil Program")137 }138 if got, want := created(prog), "errors_test"; got != want {139 t.Errorf("Created = %s, want %s", got, want)140 }141 if got, want := imported(prog), "errors"; got != want {142 t.Errorf("Imported = %s, want %s", got, want)143 }144}145func TestCreateUnnamedPackage(t *testing.T) {146 var conf loader.Config147 conf.CreateFromFilenames("")148 prog, err := conf.Load()149 if err != nil {150 t.Fatalf("Load failed: %v", err)151 }152 if got, want := fmt.Sprint(prog.InitialPackages()), "[(unnamed)]"; got != want {153 t.Errorf("InitialPackages = %s, want %s", got, want)154 }155}156func TestLoad_MissingFileInCreatedPackage(t *testing.T) {157 var conf loader.Config158 conf.CreateFromFilenames("", "missing.go")159 const wantErr = "couldn't load packages due to errors: (unnamed)"160 prog, err := conf.Load()161 if prog != nil {162 t.Errorf("Load unexpectedly returned a Program")163 }164 if err == nil {165 t.Fatalf("Load succeeded unexpectedly, want %q", wantErr)166 }167 if err.Error() != wantErr {168 t.Fatalf("Load failed with wrong error %q, want %q", err, wantErr)169 }170}171func TestLoad_MissingFileInCreatedPackage_AllowErrors(t *testing.T) {172 conf := loader.Config{AllowErrors: true}173 conf.CreateFromFilenames("", "missing.go")174 prog, err := conf.Load()175 if err != nil {176 t.Errorf("Load failed: %v", err)177 }178 if got, want := fmt.Sprint(prog.InitialPackages()), "[(unnamed)]"; got != want {179 t.Fatalf("InitialPackages = %s, want %s", got, want)180 }181}182func TestLoad_ParseError(t *testing.T) {183 var conf loader.Config184 conf.CreateFromFilenames("badpkg", "testdata/badpkgdecl.go")185 const wantErr = "couldn't load packages due to errors: badpkg"186 prog, err := conf.Load()187 if prog != nil {188 t.Errorf("Load unexpectedly returned a Program")189 }190 if err == nil {191 t.Fatalf("Load succeeded unexpectedly, want %q", wantErr)192 }193 if err.Error() != wantErr {194 t.Fatalf("Load failed with wrong error %q, want %q", err, wantErr)195 }196}197func TestLoad_ParseError_AllowErrors(t *testing.T) {198 var conf loader.Config199 conf.AllowErrors = true200 conf.CreateFromFilenames("badpkg", "testdata/badpkgdecl.go")201 prog, err := conf.Load()202 if err != nil {203 t.Errorf("Load failed unexpectedly: %v", err)204 }205 if prog == nil {206 t.Fatalf("Load returned a nil Program")207 }208 if got, want := created(prog), "badpkg"; got != want {209 t.Errorf("Created = %s, want %s", got, want)210 }211 badpkg := prog.Created[0]212 if len(badpkg.Files) != 1 {213 t.Errorf("badpkg has %d files, want 1", len(badpkg.Files))214 }215 wantErr := filepath.Join("testdata", "badpkgdecl.go") + ":1:34: expected 'package', found 'EOF'"216 if !hasError(badpkg.Errors, wantErr) {217 t.Errorf("badpkg.Errors = %v, want %s", badpkg.Errors, wantErr)218 }219}220func TestLoad_FromSource_Success(t *testing.T) {221 var conf loader.Config222 conf.CreateFromFilenames("P", "testdata/a.go", "testdata/b.go")223 prog, err := conf.Load()224 if err != nil {225 t.Errorf("Load failed unexpectedly: %v", err)226 }227 if prog == nil {228 t.Fatalf("Load returned a nil Program")229 }230 if got, want := created(prog), "P"; got != want {231 t.Errorf("Created = %s, want %s", got, want)232 }233}234func TestLoad_FromImports_Success(t *testing.T) {235 if runtime.Compiler == "gccgo" {236 t.Skip("gccgo has no standard library test files")237 }238 var conf loader.Config239 conf.ImportWithTests("fmt")240 conf.ImportWithTests("errors")241 prog, err := conf.Load()242 if err != nil {243 t.Errorf("Load failed unexpectedly: %v", err)244 }245 if prog == nil {246 t.Fatalf("Load returned a nil Program")247 }248 if got, want := created(prog), "errors_test fmt_test"; got != want {249 t.Errorf("Created = %q, want %s", got, want)250 }251 if got, want := imported(prog), "errors fmt"; got != want {252 t.Errorf("Imported = %s, want %s", got, want)253 }254 // Check set of transitive packages.255 // There are >30 and the set may grow over time, so only check a few.256 want := map[string]bool{257 "strings": true,258 "time": true,259 "runtime": true,260 "testing": true,261 "unicode": true,262 }263 for _, path := range all(prog) {264 delete(want, path)265 }266 if len(want) > 0 {267 t.Errorf("AllPackages is missing these keys: %q", keys(want))268 }269}270func TestLoad_MissingIndirectImport(t *testing.T) {271 pkgs := map[string]string{272 "a": `package a; import _ "b"`,273 "b": `package b; import _ "c"`,274 }275 conf := loader.Config{Build: fakeContext(pkgs)}276 conf.Import("a")277 const wantErr = "couldn't load packages due to errors: b"278 prog, err := conf.Load()279 if err == nil {280 t.Errorf("Load succeeded unexpectedly, want %q", wantErr)281 } else if err.Error() != wantErr {282 t.Errorf("Load failed with wrong error %q, want %q", err, wantErr)283 }284 if prog != nil {285 t.Errorf("Load unexpectedly returned a Program")286 }287}288func TestLoad_BadDependency_AllowErrors(t *testing.T) {289 for _, test := range []struct {290 descr string291 pkgs map[string]string292 wantPkgs string293 }{294 {295 descr: "missing dependency",296 pkgs: map[string]string{297 "a": `package a; import _ "b"`,298 "b": `package b; import _ "c"`,299 },300 wantPkgs: "a b",301 },302 {303 descr: "bad package decl in dependency",304 pkgs: map[string]string{305 "a": `package a; import _ "b"`,306 "b": `package b; import _ "c"`,307 "c": `package`,308 },309 wantPkgs: "a b",310 },311 {312 descr: "parse error in dependency",313 pkgs: map[string]string{314 "a": `package a; import _ "b"`,315 "b": `package b; import _ "c"`,316 "c": `package c; var x = `,317 },318 wantPkgs: "a b c",319 },320 } {321 conf := loader.Config{322 AllowErrors: true,323 Build: fakeContext(test.pkgs),324 }325 conf.Import("a")326 prog, err := conf.Load()327 if err != nil {328 t.Errorf("%s: Load failed unexpectedly: %v", test.descr, err)329 }330 if prog == nil {331 t.Fatalf("%s: Load returned a nil Program", test.descr)332 }333 if got, want := imported(prog), "a"; got != want {334 t.Errorf("%s: Imported = %s, want %s", test.descr, got, want)335 }336 if got := all(prog); strings.Join(got, " ") != test.wantPkgs {337 t.Errorf("%s: AllPackages = %s, want %s", test.descr, got, test.wantPkgs)338 }339 }340}341func TestCwd(t *testing.T) {342 ctxt := fakeContext(map[string]string{"one/two/three": `package three`})343 for _, test := range []struct {344 cwd, arg, want string345 }{346 {cwd: "/go/src/one", arg: "./two/three", want: "one/two/three"},347 {cwd: "/go/src/one", arg: "../one/two/three", want: "one/two/three"},348 {cwd: "/go/src/one", arg: "one/two/three", want: "one/two/three"},349 {cwd: "/go/src/one/two/three", arg: ".", want: "one/two/three"},350 {cwd: "/go/src/one", arg: "two/three", want: ""},351 } {352 conf := loader.Config{353 Cwd: test.cwd,354 Build: ctxt,355 }356 conf.Import(test.arg)357 var got string358 prog, err := conf.Load()359 if prog != nil {360 got = imported(prog)361 }362 if got != test.want {363 t.Errorf("Load(%s) from %s: Imported = %s, want %s",364 test.arg, test.cwd, got, test.want)365 if err != nil {366 t.Errorf("Load failed: %v", err)367 }368 }369 }370}371func TestLoad_vendor(t *testing.T) {372 pkgs := map[string]string{373 "a": `package a; import _ "x"`,374 "a/vendor": ``, // mkdir a/vendor375 "a/vendor/x": `package xa`,376 "b": `package b; import _ "x"`,377 "b/vendor": ``, // mkdir b/vendor378 "b/vendor/x": `package xb`,379 "c": `package c; import _ "x"`,380 "x": `package xc`,381 }382 conf := loader.Config{Build: fakeContext(pkgs)}383 conf.Import("a")384 conf.Import("b")385 conf.Import("c")386 prog, err := conf.Load()387 if err != nil {388 t.Fatal(err)389 }390 // Check that a, b, and c see different versions of x.391 for _, r := range "abc" {392 name := string(r)393 got := prog.Package(name).Pkg.Imports()[0]394 want := "x" + name395 if got.Name() != want {396 t.Errorf("package %s import %q = %s, want %s",397 name, "x", got.Name(), want)398 }399 }400}401func TestVendorCwd(t *testing.T) {402 // Test the interaction of cwd and vendor directories.403 ctxt := fakeContext(map[string]string{404 "net": ``, // mkdir net405 "net/http": `package http; import _ "hpack"`,406 "vendor": ``, // mkdir vendor407 "vendor/hpack": `package vendorhpack`,408 "hpack": `package hpack`,409 })410 for i, test := range []struct {411 cwd, arg, want string412 }{413 {cwd: "/go/src/net", arg: "http"}, // not found414 {cwd: "/go/src/net", arg: "./http", want: "net/http vendor/hpack"},415 {cwd: "/go/src/net", arg: "hpack", want: "vendor/hpack"},416 {cwd: "/go/src/vendor", arg: "hpack", want: "vendor/hpack"},417 {cwd: "/go/src/vendor", arg: "./hpack", want: "vendor/hpack"},418 } {419 conf := loader.Config{420 Cwd: test.cwd,421 Build: ctxt,422 }423 conf.Import(test.arg)424 var got string425 prog, err := conf.Load()426 if prog != nil {427 got = strings.Join(all(prog), " ")428 }429 if got != test.want {430 t.Errorf("#%d: Load(%s) from %s: got %s, want %s",431 i, test.arg, test.cwd, got, test.want)432 if err != nil {433 t.Errorf("Load failed: %v", err)434 }435 }436 }437}438func TestVendorCwdIssue16580(t *testing.T) {439 // Regression test for Go issue 16580.440 // Import decls in "created" packages were vendor-resolved441 // w.r.t. cwd, not the parent directory of the package's files.442 ctxt := fakeContext(map[string]string{443 "a": ``, // mkdir a444 "a/vendor": ``, // mkdir a/vendor445 "a/vendor/b": `package b; const X = true`,446 "b": `package b; const X = false`,447 })448 for _, test := range []struct {449 filename, cwd string450 want bool // expected value of b.X; depends on filename, not on cwd451 }{452 {filename: "c.go", cwd: "/go/src", want: false},453 {filename: "c.go", cwd: "/go/src/a", want: false},454 {filename: "c.go", cwd: "/go/src/a/b", want: false},455 {filename: "c.go", cwd: "/go/src/a/vendor/b", want: false},456 {filename: "/go/src/a/c.go", cwd: "/go/src", want: true},457 {filename: "/go/src/a/c.go", cwd: "/go/src/a", want: true},458 {filename: "/go/src/a/c.go", cwd: "/go/src/a/b", want: true},459 {filename: "/go/src/a/c.go", cwd: "/go/src/a/vendor/b", want: true},460 {filename: "/go/src/c/c.go", cwd: "/go/src", want: false},461 {filename: "/go/src/c/c.go", cwd: "/go/src/a", want: false},462 {filename: "/go/src/c/c.go", cwd: "/go/src/a/b", want: false},463 {filename: "/go/src/c/c.go", cwd: "/go/src/a/vendor/b", want: false},464 } {465 conf := loader.Config{466 Cwd: test.cwd,467 Build: ctxt,468 }469 f, err := conf.ParseFile(test.filename, `package dummy; import "b"; const X = b.X`)470 if err != nil {471 t.Fatal(f)472 }473 conf.CreateFromFiles("dummy", f)474 prog, err := conf.Load()475 if err != nil {476 t.Errorf("%+v: Load failed: %v", test, err)477 continue478 }479 x := constant.BoolVal(prog.Created[0].Pkg.Scope().Lookup("X").(*types.Const).Val())480 if x != test.want {481 t.Errorf("%+v: b.X = %t", test, x)482 }483 }484 // TODO(adonovan): also test imports within XTestGoFiles.485}486// TODO(adonovan): more Load tests:487//488// failures:489// - to parse package decl of *_test.go files490// - to parse package decl of external *_test.go files491// - to parse whole of *_test.go files492// - to parse whole of external *_test.go files493// - to open a *.go file during import scanning494// - to import from binary495// features:496// - InitialPackages497// - PackageCreated hook498// - TypeCheckFuncBodies hook499func TestTransitivelyErrorFreeFlag(t *testing.T) {500 // Create an minimal custom build.Context501 // that fakes the following packages:502 //503 // a --> b --> c! c has an error504 // \ d and e are transitively error-free.505 // e --> d506 //507 // Each package [a-e] consists of one file, x.go.508 pkgs := map[string]string{509 "a": `package a; import (_ "b"; _ "e")`,510 "b": `package b; import _ "c"`,511 "c": `package c; func f() { _ = int(false) }`, // type error within function body512 "d": `package d;`,513 "e": `package e; import _ "d"`,514 }515 conf := loader.Config{516 AllowErrors: true,517 Build: fakeContext(pkgs),518 }519 conf.Import("a")520 prog, err := conf.Load()521 if err != nil {522 t.Errorf("Load failed: %s", err)523 }524 if prog == nil {525 t.Fatalf("Load returned nil *Program")526 }527 for pkg, info := range prog.AllPackages {528 var wantErr, wantTEF bool529 switch pkg.Path() {530 case "a", "b":531 case "c":532 wantErr = true533 case "d", "e":534 wantTEF = true535 default:536 t.Errorf("unexpected package: %q", pkg.Path())537 continue538 }539 if (info.Errors != nil) != wantErr {540 if wantErr {541 t.Errorf("Package %q.Error = nil, want error", pkg.Path())542 } else {543 t.Errorf("Package %q has unexpected Errors: %v",544 pkg.Path(), info.Errors)545 }546 }547 if info.TransitivelyErrorFree != wantTEF {548 t.Errorf("Package %q.TransitivelyErrorFree=%t, want %t",549 pkg.Path(), info.TransitivelyErrorFree, wantTEF)550 }551 }552}553// Test that syntax (scan/parse), type, and loader errors are recorded554// (in PackageInfo.Errors) and reported (via Config.TypeChecker.Error).555func TestErrorReporting(t *testing.T) {556 pkgs := map[string]string{557 "a": `package a; import (_ "b"; _ "c"); var x int = false`,558 "b": `package b; 'syntax error!`,559 }560 conf := loader.Config{561 AllowErrors: true,562 Build: fakeContext(pkgs),563 }564 var mu sync.Mutex565 var allErrors []error566 conf.TypeChecker.Error = func(err error) {567 mu.Lock()568 allErrors = append(allErrors, err)569 mu.Unlock()570 }571 conf.Import("a")572 prog, err := conf.Load()573 if err != nil {574 t.Errorf("Load failed: %s", err)575 }576 if prog == nil {577 t.Fatalf("Load returned nil *Program")578 }579 // TODO(adonovan): test keys of ImportMap.580 // Check errors recorded in each PackageInfo.581 for pkg, info := range prog.AllPackages {582 switch pkg.Path() {583 case "a":584 if !hasError(info.Errors, "cannot convert false") {585 t.Errorf("a.Errors = %v, want bool conversion (type) error", info.Errors)586 }587 if !hasError(info.Errors, "could not import c") {588 t.Errorf("a.Errors = %v, want import (loader) error", info.Errors)589 }590 case "b":591 if !hasError(info.Errors, "rune literal not terminated") {592 t.Errorf("b.Errors = %v, want unterminated literal (syntax) error", info.Errors)593 }594 }595 }596 // Check errors reported via error handler.597 if !hasError(allErrors, "cannot convert false") ||598 !hasError(allErrors, "rune literal not terminated") ||599 !hasError(allErrors, "could not import c") {600 t.Errorf("allErrors = %v, want syntax, type and loader errors", allErrors)601 }602}603func TestCycles(t *testing.T) {604 for _, test := range []struct {605 descr string606 ctxt *build.Context607 wantErr string608 }{609 {610 "self-cycle",611 fakeContext(map[string]string{612 "main": `package main; import _ "selfcycle"`,613 "selfcycle": `package selfcycle; import _ "selfcycle"`,614 }),615 `import cycle: selfcycle -> selfcycle`,616 },617 {618 "three-package cycle",619 fakeContext(map[string]string{620 "main": `package main; import _ "a"`,621 "a": `package a; import _ "b"`,622 "b": `package b; import _ "c"`,623 "c": `package c; import _ "a"`,624 }),625 `import cycle: c -> a -> b -> c`,626 },627 {628 "self-cycle in dependency of test file",629 buildutil.FakeContext(map[string]map[string]string{630 "main": {631 "main.go": `package main`,632 "main_test.go": `package main; import _ "a"`,633 },634 "a": {635 "a.go": `package a; import _ "a"`,636 },637 }),638 `import cycle: a -> a`,639 },640 // TODO(adonovan): fix: these fail641 // {642 // "two-package cycle in dependency of test file",643 // buildutil.FakeContext(map[string]map[string]string{644 // "main": {645 // "main.go": `package main`,646 // "main_test.go": `package main; import _ "a"`,647 // },648 // "a": {649 // "a.go": `package a; import _ "main"`,650 // },651 // }),652 // `import cycle: main -> a -> main`,653 // },654 // {655 // "self-cycle in augmented package",656 // buildutil.FakeContext(map[string]map[string]string{657 // "main": {658 // "main.go": `package main`,659 // "main_test.go": `package main; import _ "main"`,660 // },661 // }),662 // `import cycle: main -> main`,663 // },664 } {665 conf := loader.Config{666 AllowErrors: true,667 Build: test.ctxt,668 }669 var mu sync.Mutex670 var allErrors []error671 conf.TypeChecker.Error = func(err error) {672 mu.Lock()673 allErrors = append(allErrors, err)674 mu.Unlock()675 }676 conf.ImportWithTests("main")677 prog, err := conf.Load()678 if err != nil {679 t.Errorf("%s: Load failed: %s", test.descr, err)680 }681 if prog == nil {682 t.Fatalf("%s: Load returned nil *Program", test.descr)683 }684 if !hasError(allErrors, test.wantErr) {685 t.Errorf("%s: Load() errors = %q, want %q",686 test.descr, allErrors, test.wantErr)687 }688 }689 // TODO(adonovan):690 // - Test that in a legal test cycle, none of the symbols691 // defined by augmentation are visible via import.692}693// ---- utilities ----694// Simplifying wrapper around buildutil.FakeContext for single-file packages.695func fakeContext(pkgs map[string]string) *build.Context {696 pkgs2 := make(map[string]map[string]string)697 for path, content := range pkgs {698 pkgs2[path] = map[string]string{"x.go": content}699 }700 return buildutil.FakeContext(pkgs2)701}702func hasError(errors []error, substr string) bool {703 for _, err := range errors {704 if strings.Contains(err.Error(), substr) {705 return true706 }707 }708 return false709}710func keys(m map[string]bool) (keys []string) {711 for key := range m {712 keys = append(keys, key)713 }714 sort.Strings(keys)715 return716}717// Returns all loaded packages.718func all(prog *loader.Program) []string {719 var pkgs []string720 for _, info := range prog.AllPackages {721 pkgs = append(pkgs, info.Pkg.Path())722 }723 sort.Strings(pkgs)724 return pkgs725}726// Returns initially imported packages, as a string.727func imported(prog *loader.Program) string {728 var pkgs []string729 for _, info := range prog.Imported {730 pkgs = append(pkgs, info.Pkg.Path())731 }732 sort.Strings(pkgs)733 return strings.Join(pkgs, " ")734}735// Returns initially created packages, as a string.736func created(prog *loader.Program) string {737 var pkgs []string738 for _, info := range prog.Created {739 pkgs = append(pkgs, info.Pkg.Path())740 }741 return strings.Join(pkgs, " ")742}743// Load package "io" twice in parallel.744// When run with -race, this is a regression test for Go issue 20718, in745// which the global "unsafe" package was modified concurrently.746func TestLoad1(t *testing.T) { loadIO(t) }747func TestLoad2(t *testing.T) { loadIO(t) }748func loadIO(t *testing.T) {749 t.Parallel()750 conf := &loader.Config{ImportPkgs: map[string]bool{"io": false}}751 if _, err := conf.Load(); err != nil {752 t.Fatal(err)753 }754}...

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1import (2func main() {3 fmt.Println("Hello World")4 main.Load()5}6import (7func main() {8 fmt.Println("Hello World")9 main.Load()10}11 /usr/lib/go-1.6/src/main (from $GOROOT)12 /home/username/go/src/main (from $GOPATH)13 /usr/lib/go-1.6/src/main (from $GOROOT)14 /home/username/go/src/main (from $GOPATH)15 /usr/lib/go-1.6/src/main (from $GOROOT)16 /home/username/go/src/main (from $GOPATH)17 /usr/lib/go-1.6/src/main (from $GOROOT)18 /home/username/go/src/main (from $GOPATH)19 /usr/lib/go-1.6/src/main (from $GOROOT)20 /home/username/go/src/main (from $GOPATH)21Your name to display (optional):22Your name to display (optional):

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1import (2func main() {3 mainClass := reflect.New(reflect.TypeOf(main{}))4 method := mainClass.MethodByName("Load")5 method.Call(nil)6}

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1import (2func main() {3 fmt.Println("I am in 2.go file")4 main.Load()5}6import (7func main() {8 fmt.Println("I am in 3.go file")9 main.Load()10}11import (12func main() {13 fmt.Println("I am in 4.go file")14 main.Load()15}16import (17func main() {18 fmt.Println("I am in 5.go file")19 main.Load()20}21import (22func main() {23 fmt.Println("I am in 6.go file")24 main.Load()25}26import (27func main() {28 fmt.Println("I am in 7.go file")29 main.Load()30}31import (32func main() {33 fmt.Println("I am in 8.go file")34 main.Load()35}36import (37func main() {38 fmt.Println("I am in 9.go file")39 main.Load()40}41import (42func main() {

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1import (2func main() {3 fmt.Println("Starting the application...")4 main.Load()5 fmt.Println("Ending the application...")6}

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