diff options
Diffstat (limited to 'src/cmd/compile/internal/typecheck/func.go')
| -rw-r--r-- | src/cmd/compile/internal/typecheck/func.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/typecheck/func.go b/src/cmd/compile/internal/typecheck/func.go index 5f9f8c6ebd..d0aad5ac07 100644 --- a/src/cmd/compile/internal/typecheck/func.go +++ b/src/cmd/compile/internal/typecheck/func.go @@ -961,7 +961,14 @@ func tcUnsafeSlice(n *ir.BinaryExpr) *ir.BinaryExpr { t := n.X.Type() if !t.IsPtr() { base.Errorf("first argument to unsafe.Slice must be pointer; have %L", t) + } else if t.Elem().NotInHeap() { + // TODO(mdempsky): This can be relaxed, but should only affect the + // Go runtime itself. End users should only see //go:notinheap + // types due to incomplete C structs in cgo, and those types don't + // have a meaningful size anyway. + base.Errorf("unsafe.Slice of incomplete (or unallocatable) type not allowed") } + if !checkunsafeslice(&n.Y) { n.SetType(nil) return n |