3 files changed, 82 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssa/expand_calls.go b/src/cmd/compile/internal/ssa/expand_calls.go
index 679ee8ad16..e06ed882f0 100644
--- a/src/cmd/compile/internal/ssa/expand_calls.go
+++ b/src/cmd/compile/internal/ssa/expand_calls.go
@@ -527,6 +527,7 @@ func expandCalls(f *Func) {
 				// it could be a leaf type, but the "leaf" could be complex64 (for example)
 				return storeArgOrLoad(pos, b, base, source, mem, t, offset)
 			}
+			source.Type = t
 			for i := int64(0); i < t.NumElem(); i++ {
 				sel := source.Block.NewValue1I(pos, OpArraySelect, elt, i, source)
 				mem = storeArgOrLoad(pos, b, base, sel, mem, elt, offset+i*elt.Width)
@@ -559,6 +560,7 @@ func expandCalls(f *Func) {
 				return storeArgOrLoad(pos, b, base, source, mem, t, offset)
 			}
 
+			source.Type = t
 			for i := 0; i < t.NumFields(); i++ {
 				fld := t.Field(i)
 				sel := source.Block.NewValue1I(pos, OpStructSelect, fld.Type, int64(i), source)
diff --git a/test/fixedbugs/issue49249.go b/test/fixedbugs/issue49249.go
new file mode 100644
index 0000000000..f152a5a701
--- /dev/null
+++ b/test/fixedbugs/issue49249.go
@@ -0,0 +1,55 @@
+// compile -l
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+func f() int {
+	var a, b struct {
+		s struct {
+			s struct {
+				byte
+				float32
+			}
+		}
+	}
+	_ = a
+
+	return func() int {
+		return func() int {
+			a = struct {
+				s struct {
+					s struct {
+						byte
+						float32
+					}
+				}
+			}{b.s}
+			return 0
+		}()
+	}()
+}
+
+func g() int {
+	var a, b struct {
+		s [1][1]struct {
+			byte
+			float32
+		}
+	}
+	_ = a
+
+	return func() int {
+		return func() int {
+			a = struct {
+				s [1][1]struct {
+					byte
+					float32
+				}
+			}{b.s}
+			return 0
+		}()
+	}()
+}
diff --git a/test/fixedbugs/issue49378.go b/test/fixedbugs/issue49378.go
new file mode 100644
index 0000000000..70f466c929
--- /dev/null
+++ b/test/fixedbugs/issue49378.go
@@ -0,0 +1,25 @@
+// compile
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+func f(i int) {
+	var s1 struct {
+		s struct{ s struct{ i int } }
+	}
+	var s2, s3 struct {
+		a struct{ i int }
+		b int
+	}
+	func() {
+		i = 1 + 2*i + s3.a.i + func() int {
+			s2.a, s2.b = s3.a, s3.b
+			return 0
+		}() + func(*int) int {
+			return s1.s.s.i
+		}(new(int))
+	}()
+}