cmd/go: propagate match errors in 'go run'

Fixes #51604.

Change-Id: I3bc86652c62d2b329d9c2db5ea443d56cf17f8d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/418094
Reviewed-by: Nooras Saba‎ <saba@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>

Author: Bryan C. Mills

src/cmd/go/internal/load/pkg.go

@@ -2915,7 +2915,7 @@ func mainPackagesOnly(pkgs []*Package, matches []*search.Match) []*Package {
 
 	var mains []*Package
 	for _, pkg := range pkgs {
-		if pkg.Name == "main" {
+		if pkg.Name == "main" || (pkg.Name == "" && pkg.Error != nil) {
 			treatAsMain[pkg.ImportPath] = true
 			mains = append(mains, pkg)
 			continue

src/cmd/go/internal/modload/load.go

@@ -607,7 +607,7 @@ func resolveLocalPackage(ctx context.Context, dir string, rs *Requirements) (str
 	if pkg == "" {
 		if inWorkspaceMode() {
 			if mr := findModuleRoot(absDir); mr != "" {
-				return "", fmt.Errorf("directory %s is contained in a module that is not one of the workspace modules listed in go.work. You can add the module to the workspace using go work use %s", base.ShortPath(absDir), base.ShortPath(mr))
+				return "", fmt.Errorf("directory %s is contained in a module that is not one of the workspace modules listed in go.work. You can add the module to the workspace using:\n\tgo work use %s", base.ShortPath(absDir), base.ShortPath(mr))
 			}
 			return "", fmt.Errorf("directory %s outside modules listed in go.work or their selected dependencies", base.ShortPath(absDir))
 		}

src/cmd/go/testdata/script/work_module_not_in_go_work.txt

@@ -7,7 +7,14 @@
 stderr 'pattern ./...: directory prefix . does not contain modules listed in go.work or their selected dependencies'
 
 ! go list ./a/c
-stderr 'directory a[\\/]c is contained in a module that is not one of the workspace modules listed in go.work. You can add the module to the workspace using go work use a'
+stderr 'directory a[\\/]c is contained in a module that is not one of the workspace modules listed in go.work. You can add the module to the workspace using:\n\tgo work use a'
+
+! go install ./a/c
+stderr 'directory a[\\/]c is contained in a module that is not one of the workspace modules listed in go.work. You can add the module to the workspace using:\n\tgo work use a'
+
+cd a/c
+! go run .
+stderr 'directory . is contained in a module that is not one of the workspace modules listed in go.work. You can add the module to the workspace using:\n\tgo work use \.\.'
 
 -- go.work --
 go 1.18
@@ -20,7 +27,7 @@ go 1.18
 -- a/a.go --
 package a
 -- a/c/c.go --
-package c
+package main
 -- b/go.mod --
 module example.com/b