3 files changed, 8 insertions, 0 deletions
diff --git a/interp/interpreter.go b/interp/interpreter.go
index 64bb060d8..ece8b2579 100644
--- a/interp/interpreter.go
+++ b/interp/interpreter.go
@@ -388,6 +388,10 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				if err != nil {
 					return nil, mem, r.errorAt(inst, err)
 				}
+				if !actualTypePtrToInt.IsAConstantInt().IsNil() && actualTypePtrToInt.ZExtValue() == 0 {
+					locals[inst.localIndex] = literalValue{uint8(0)}
+					break
+				}
 				actualType := actualTypePtrToInt.Operand(0)
 				if strings.TrimPrefix(actualType.Name(), "reflect/types.type:") == strings.TrimPrefix(assertedType.Name(), "reflect/types.typeid:") {
 					locals[inst.localIndex] = literalValue{uint8(1)}
diff --git a/interp/testdata/interface.ll b/interp/testdata/interface.ll
index 060256d22..6520efc5c 100644
--- a/interp/testdata/interface.ll
+++ b/interp/testdata/interface.ll
@@ -5,6 +5,7 @@ target triple = "x86_64--linux"
 %runtime.interfaceMethodInfo = type { i8*, i64 }
 
 @main.v1 = global i1 0
+[email protected] = global i1 0
 @"reflect/types.type:named:main.foo" = private constant %runtime.typecodeID { %runtime.typecodeID* @"reflect/types.type:basic:int", i64 0, %runtime.interfaceMethodInfo* null }
 @"reflect/types.typeid:named:main.foo" = external constant i8
 @"reflect/types.type:basic:int" = external constant %runtime.typecodeID
@@ -23,5 +24,7 @@ entry:
   ; Test type asserts.
   %typecode = call i1 @runtime.typeAssert(i64 ptrtoint (%runtime.typecodeID* @"reflect/types.type:named:main.foo" to i64), i8* @"reflect/types.typeid:named:main.foo", i8* undef, i8* null)
   store i1 %typecode, i1* @main.v1
+  %typecode2 = call i1 @runtime.typeAssert(i64 0, i8* @"reflect/types.typeid:named:main.foo", i8* undef, i8* null)
+  store i1 %typecode2, i1* @main.v2
   ret void
 }
diff --git a/interp/testdata/interface.out.ll b/interp/testdata/interface.out.ll
index 2d2467b67..1fb9249be 100644
--- a/interp/testdata/interface.out.ll
+++ b/interp/testdata/interface.out.ll
@@ -2,6 +2,7 @@ target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64--linux"
 
 @main.v1 = local_unnamed_addr global i1 true
+[email protected] = local_unnamed_addr global i1 false
 
 define void @runtime.initAll() unnamed_addr {
 entry: