update to Go tip from April 28th

A couple of new packages in runtimeAndDeps,
and go list's Package.DepsErrors may now include package build errors
which we want to ignore as we would print those as duplicates.

.github/workflows/test.yml

@@ -88,7 +88,7 @@ jobs:
     steps:
     - name: Install Go
       env:
-        GO_COMMIT: 231f290e51e130a1699d5c29d28133d68f43d2e9 # 2023-04-08
+        GO_COMMIT: 0fd6ae548f550bdbee4a434285ff052fb9dc7417 # 2023-04-28
       run: |
         cd $HOME
         mkdir $HOME/gotip

go_std_tables.go

@@ -1,6 +1,6 @@
 // Code generated by scripts/gen-go-std-tables.sh; DO NOT EDIT.
 
-// Generated from Go version devel go1.21-ffb07d0c66 Sat Feb 25 00:15:17 2023 +0000.
+// Generated from Go version devel go1.21-0fd6ae548f Fri Apr 28 20:33:34 2023 +0000.
 
 package main
 
@@ -11,6 +11,7 @@ var runtimeAndDeps = map[string]bool{
 	"internal/cpu":             true,
 	"internal/bytealg":         true,
 	"internal/coverage/rtcov":  true,
+	"internal/godebugs":        true,
 	"internal/goexperiment":    true,
 	"internal/goos":            true,
 	"runtime/internal/atomic":  true,
@@ -30,6 +31,7 @@ var runtimeLinknamed = []string{
 	"internal/poll",
 	"internal/reflectlite",
 	"internal/syscall/unix",
+	"maps",
 	"math/rand",
 	"net",
 	"os",

shared.go

@@ -290,9 +290,17 @@ func appendListedPackages(packages []string, mainBuild bool) error {
 			}
 		}
 		if len(pkg.DepsErrors) > 0 {
-			// DepsErrors appears to not include the "# pkgpath" line.
-			pkgErrors = append(pkgErrors, "# "+pkg.ImportPath)
-			for _, derr := range pkg.DepsErrors {
+			for i, derr := range pkg.DepsErrors {
+				// When an error in DepsErrors starts with a "# pkg/path" line,
+				// it's an error that we're already printing via that package's Error field.
+				// Otherwise, the error is that we couldn't find that package at all,
+				// so we do need to print it here as that package won't be listed.
+				if i == 0 {
+					if strings.HasPrefix(derr.Err, "# ") {
+						break
+					}
+					pkgErrors = append(pkgErrors, "# "+pkg.ImportPath)
+				}
 				// Error messages sometimes include a trailing newline.
 				pkgErrors = append(pkgErrors, strings.TrimSpace(derr.Err))
 			}