cmd/doc: confusing error when a name does not exist

[mvdan]

What version of Go are you using (go version)?

go version devel +da360f30e9 Sat Nov 18 06:31:57 2017 +0000 linux/amd64

Does this issue reproduce with the latest release?

No - this is fine on Go 1.9.2.

What did you do?

$ go doc bytes foo
doc: no such package: bytes
exit status 1

What did you expect to see?

The same that Go 1.9.2 gives:

$ go doc bytes foo
doc: no symbol foo in package bytes
exit status 1

Seems like a regression in 1.10 - will look into it myself.

[mvdan]

Found e3442b4 to be the commit introducing the regression. Currently poking at the code to find the right fix.

[gopherbot]

Change https://golang.org/cl/78677 mentions this issue: cmd/doc: print a symbol error on "bytes Foo"