by mklencke:

What steps will reproduce the problem?
1. Try to 'go build' or 'go run' code that imports a package that does not exist, for
example the old "rand" package

What is the expected output?

Successful output of 'go run'.

What do you see instead?

A panic trace

Which compiler are you using (5g, 6g, 8g, gccgo)?

8g

Which operating system are you using?

Linux

Which revision are you using?  (hg identify)

54016655b9d7+ tip

Please provide any additional information below.

Simple fix is attached

Attachments:

1. buildpanic.diff (351 bytes)