From 34a5445802f140ada8023c50f95db5cbd8eb22ab Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Mon, 8 Jan 2018 21:53:04 +0000
Subject: [PATCH] compiler: don't die if addr2line cannot extract line from
 backtrace.

Fixes #885.
---
 artiq/compiler/targets.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/artiq/compiler/targets.py b/artiq/compiler/targets.py
index b3cfdec8d..db626da85 100644
--- a/artiq/compiler/targets.py
+++ b/artiq/compiler/targets.py
@@ -216,8 +216,12 @@ class Target:
                 filename, line = location.rsplit(":", 1)
                 if filename == "??" or filename == "<synthesized>":
                     continue
+                if line == "?":
+                    line = -1
+                else:
+                    line = int(line)
                 # can't get column out of addr2line D:
-                backtrace.append((filename, int(line), -1, function, address))
+                backtrace.append((filename, line, -1, function, address))
             return backtrace
 
     def demangle(self, names):