diff options
Diffstat (limited to 'prog/prog.go')
| -rw-r--r-- | prog/prog.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/prog/prog.go b/prog/prog.go index f93293b64..da6f158bc 100644 --- a/prog/prog.go +++ b/prog/prog.go @@ -354,6 +354,9 @@ func (p *Prog) insertBefore(c *Call, calls []*Call) { // replaceArg replaces arg with arg1 in a program. func replaceArg(arg, arg1 Arg) { + if arg == arg1 { + panic("replacing an argument with itself") + } switch a := arg.(type) { case *ConstArg: *a = *arg1.(*ConstArg) |