fix: Referrers() may return nil (#46)

didebughu · web-flow · commit 084f4236404d · 2026-03-17T22:03:35.000-07:00
diff --git a/pkg/analyzer/defer_only.go b/pkg/analyzer/defer_only.go
@@ -292,6 +292,10 @@ func getAction(instr ssa.Instruction, targetTypes []any) action {
 			return actionReturned
 		}
 
+		if instr.Addr.Referrers() == nil {
+			return actionNoOp
+		}
+
 		if len(*instr.Addr.Referrers()) == 0 {
 			return actionNoOp
 		}
@@ -378,6 +382,10 @@ func checkDeferred(pass *analysis.Pass, instrs *[]ssa.Instruction, targetTypes [
 				return
 			}
 		case *ssa.Store:
+			if instr.Addr.Referrers() == nil {
+				return
+			}
+
 			if len(*instr.Addr.Referrers()) == 0 {
 				return
 			}

Original file line number	Diff line number	Diff line change
`@@ -292,6 +292,10 @@ func getAction(instr ssa.Instruction, targetTypes []any) action {`
`292`	`292`	`return actionReturned`
`293`	`293`	`}`
`294`	`294`
	`295`	`+ if instr.Addr.Referrers() == nil {`
	`296`	`+ return actionNoOp`
	`297`	`+ }`
	`298`	`+`
`295`	`299`	`if len(*instr.Addr.Referrers()) == 0 {`
`296`	`300`	`return actionNoOp`
`297`	`301`	`}`
`@@ -378,6 +382,10 @@ func checkDeferred(pass analysis.Pass, instrs []ssa.Instruction, targetTypes [`
`378`	`382`	`return`
`379`	`383`	`}`
`380`	`384`	`case *ssa.Store:`
	`385`	`+ if instr.Addr.Referrers() == nil {`
	`386`	`+ return`
	`387`	`+ }`
	`388`	`+`
`381`	`389`	`if len(*instr.Addr.Referrers()) == 0 {`
`382`	`390`	`return`
`383`	`391`	`}`