commit 2d1a32ab4b0ce488726dd8929c85840dc73ed7dd

Author: Andy Lutomirski <luto@kernel.org>

Date:   Tue Sep 15 18:27:52 2015 -0700

    Switch show_stackframe to backtrace_symbols_fd

    It's simpler and avoids calling into fprintf in contexts in which

    it might crash or deadlock.

diff --git a/src/common.cpp b/src/common.cpp

index 78d0e23865c5..f5eb2ca5b921 100644

--- a/src/common.cpp

+++ b/src/common.cpp

@@ -90,17 +90,8 @@ void show_stackframe()

     int trace_size = 0;

     trace_size = backtrace(trace, 32);

-    char **messages = backtrace_symbols(trace, trace_size);

-

-    if (messages)

-    {

-        debug(0, L"Backtrace:");

-        for (int i=0; i

-        {

-            fwprintf(stderr, L"%s\n", messages[i]);

-        }

-        free(messages);

-    }

+    debug(0, L"Backtrace:");

+    backtrace_symbols_fd(trace, trace_size, STDERR_FILENO);

 }

 int fgetws2(wcstring *s, FILE *f)