From 8d5bf56064b8112f5deb840a57081689a0c60a03 Mon Sep 17 00:00:00 2001
From: Wei Mi <wmi@google.com>
Date: Fri, 9 Jul 2021 23:09:53 -0700
Subject: [PATCH] Fix a check failure "[functioninfo.h:163] Check failed:
 logical_num > 0 (0 vs. 0)".

Some code was mistakenly dropped during merge and now it is added back.
---
 legacy_addr2line.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/legacy_addr2line.cc b/legacy_addr2line.cc
index daa8d1b..2478449 100644
--- a/legacy_addr2line.cc
+++ b/legacy_addr2line.cc
@@ -184,6 +184,9 @@ void Google3Addr2line::GetInlineStack(uint64_t address,
   if (iter == line_map_->begin())
     return;
   --iter;
+  if (iter->second == 0)
+    return;
+
   const LineIdentifier &LI = line_map_->GetLogical(iter->second);
   if (LI.line == 0)
     return;