prevent panic when hclog_formatter_node is operating on a struct (#1456)

CHANGELOG.md

@@ -4,6 +4,11 @@ Canonical reference for changes, improvements, and bugfixes for Boundary.
 
 ## Next
 
+### Bug Fixes
+
+* events: Fix panic when using the `hclog-text` event's format.
+  ([PR](https://github.com/hashicorp/boundary/pull/1456))
+
 ## 0.5.0 (2021/08/02)
 
 ### Deprecations/Changes

internal/observability/event/hclog_formatter_node.go

@@ -118,8 +118,10 @@ func (f *hclogFormatterFilter) Process(ctx context.Context, e *eventlogger.Event
 			continue
 		}
 		if !f.jsonFormat && v != nil {
+			var underlyingPtr bool
 			valueKind := reflect.TypeOf(v).Kind()
 			if valueKind == reflect.Ptr {
+				underlyingPtr = true
 				valueKind = reflect.TypeOf(v).Elem().Kind()
 			}
 			switch {
@@ -128,7 +130,10 @@ func (f *hclogFormatterFilter) Process(ctx context.Context, e *eventlogger.Event
 					args = append(args, k+":"+sk, sv)
 				}
 				continue
-			case valueKind == reflect.Struct && v != nil && !reflect.ValueOf(v).IsNil():
+			case valueKind == reflect.Struct:
+				if underlyingPtr && (v == nil || reflect.ValueOf(v).IsNil()) {
+					continue
+				}
 				for sk, sv := range structs.Map(v) {
 					args = append(args, k+":"+sk, sv)
 				}