cmd/dist: check for errors from filepath.Glob

Change-Id: Ib5bcd3d1e9618d65b4d4b0895d0e40dbd76646c6
GitHub-Last-Rev: 174084c
GitHub-Pull-Request: #59516
Reviewed-on: https://go-review.googlesource.com/c/go/+/483435
Run-TryBot: Ian Lance Taylor <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>

Author: wjw1758548031

src/cmd/dist/build.go

@@ -1452,7 +1452,10 @@ func cmdbootstrap() {
 	bootstrapBuildTools()
 
 	// Remember old content of $GOROOT/bin for comparison below.
-	oldBinFiles, _ := filepath.Glob(pathf("%s/bin/*", goroot))
+	oldBinFiles, err := filepath.Glob(pathf("%s/bin/*", goroot))
+	if err != nil {
+		fatalf("glob: %v", err)
+	}
 
 	// For the main bootstrap, building for host os/arch.
 	oldgoos = goos
@@ -1592,7 +1595,11 @@ func cmdbootstrap() {
 
 	// Check that there are no new files in $GOROOT/bin other than
 	// go and gofmt and $GOOS_$GOARCH (target bin when cross-compiling).
-	binFiles, _ := filepath.Glob(pathf("%s/bin/*", goroot))
+	binFiles, err := filepath.Glob(pathf("%s/bin/*", goroot))
+	if err != nil {
+		fatalf("glob: %v", err)
+	}
+
 	ok := map[string]bool{}
 	for _, f := range oldBinFiles {
 		ok[f] = true