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Diffstat (limited to 'src/cmd/compile/internal/types2/typeterm.go')
| -rw-r--r-- | src/cmd/compile/internal/types2/typeterm.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/types2/typeterm.go b/src/cmd/compile/internal/types2/typeterm.go index 8edbefa579..1d7223f13c 100644 --- a/src/cmd/compile/internal/types2/typeterm.go +++ b/src/cmd/compile/internal/types2/typeterm.go @@ -151,6 +151,9 @@ func (x *term) subsetOf(y *term) bool { // disjoint reports whether x ∩ y == ∅. // x.typ and y.typ must not be nil. func (x *term) disjoint(y *term) bool { + if debug && (x.typ == nil || y.typ == nil) { + panic("invalid argument(s)") + } ux := x.typ if y.tilde { ux = under(ux) |