From 49d1206b9406240fb506b3c5eee4effd70f513a1 Mon Sep 17 00:00:00 2001
From: aarzilli <alessandro.arzilli@gmail.com>
Date: Wed, 9 May 2018 10:08:49 +0200
Subject: [PATCH] proc: do not assume g.gopc is valid

Fixes #1203
---
 pkg/proc/variables.go | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/pkg/proc/variables.go b/pkg/proc/variables.go
index 3261a2ea..4d826c5f 100644
--- a/pkg/proc/variables.go
+++ b/pkg/proc/variables.go
@@ -535,11 +535,12 @@ func (g *G) UserCurrent() Location {
 // that spawned this goroutine.
 func (g *G) Go() Location {
 	pc := g.GoPC
-	fn := g.variable.bi.PCToFunc(pc)
-	// Backup to CALL instruction.
-	// Mimics runtime/traceback.go:677.
-	if g.GoPC > fn.Entry {
-		pc -= 1
+	if fn := g.variable.bi.PCToFunc(pc); fn != nil {
+		// Backup to CALL instruction.
+		// Mimics runtime/traceback.go:677.
+		if g.GoPC > fn.Entry {
+			pc -= 1
+		}
 	}
 	f, l, fn := g.variable.bi.PCToLine(pc)
 	return Location{PC: g.GoPC, File: f, Line: l, Fn: fn}
-- 
GitLab