[dev.regabi] all: merge master (d0c0dc682c1f) into dev.regabi

Change-Id: Ia54d7306ca7550b8d5623f505070558d275faa23

diff --cc src/cmd/dist/buildtool.go
Simple merge

diff --cc test/fixedbugs/bug340.go
index a0679404089206bee1e49ce22acb30c276474955,8c543c98d97e3b5299e1747a96b6a8f6de4880ef..542a6eab03d2d5f3e418866938dbe7df5acd48a8
--- 1/test/fixedbugs/bug340.go
--- 2/test/fixedbugs/bug340.go
+++ b/test/fixedbugs/bug340.go
@@@ -12,7 -12,6 +12,7 @@@ func main() 
        var x interface{}
        switch t := x.(type) {
        case 0:         // ERROR "type"
 -              t.x = 1 // ERROR "type interface \{\}|reference to undefined field or method|interface with no methods"
 +              t.x = 1
-               x.x = 1 // ERROR "type interface \{\}|reference to undefined field or method"
++              x.x = 1 // ERROR "type interface \{\}|reference to undefined field or method|interface with no methods"
        }
  }