std: fix various nilness findings

Found by running
$ go run golang.org/x/tools/go/analysis/passes/nilness/cmd/nilness@latest std

No actual bugs--other than one panic(nil)--but a
few places where error nilness was unclear.

Change-Id: Ia916ba30f46f29c1bcf928cc62280169b922463a
Reviewed-on: https://go-review.googlesource.com/c/go/+/486675
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Alan Donovan <adonovan@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Alan Donovan <adonovan@google.com>
This commit is contained in:
Alan Donovan 2023-04-19 18:48:00 -04:00 committed by Gopher Robot
parent 5c865c78c3
commit 9d35ebba06
6 changed files with 14 additions and 12 deletions

View file

@ -268,7 +268,7 @@ type panicReader struct{ panic bool }
func (r panicReader) Read(p []byte) (int, error) {
if r.panic {
panic(nil)
panic("oops")
}
return 0, io.EOF
}