backport of commit bb26771e2d

hcl2template/types.variables.go

@@ -741,7 +741,6 @@ func (cfg *PackerConfig) collectInputVariableValues(env []string, files []*hcl.F
 					Severity: hcl.DiagError,
 					Summary:  "Invalid argument value for -var variable",
 					Detail:   fmt.Sprintf("The received arg value for %s is not compatible with the variable's type constraint: %s.", name, err),
-					Subject:  expr.Range().Ptr(),
 				})
 				val = cty.DynamicVal
 			}