[gcc/devel/gccgo] libbacktrace: don't free ELF strtab if error occurs after saving syminfo

[Ian Lance Taylor]

https://gcc.gnu.org/g:8600440e1479a8bd0394509b86a4d85d98ca6c8a

commit 8600440e1479a8bd0394509b86a4d85d98ca6c8a
Author: Ian Lance Taylor <iant@golang.org>
Date:   Wed Feb 19 10:30:51 2020 -0800

    libbacktrace: don't free ELF strtab if error occurs after saving syminfo
    
            * elf.c (elf_add): Don't free strtab if an error occurs after
            recording symbol information.

Diff:
---
 libbacktrace/ChangeLog | 5 +++++
 libbacktrace/elf.c     | 1 +
 2 files changed, 6 insertions(+)

diff --git a/libbacktrace/ChangeLog b/libbacktrace/ChangeLog
index 6fa15fc4e96..13d907011d8 100644
--- a/libbacktrace/ChangeLog
+++ b/libbacktrace/ChangeLog
@@ -1,3 +1,8 @@
+2020-05-09  Ian Lance Taylor  <iant@golang.org>
+
+	* elf.c (elf_add): Don't free strtab if an error occurs after
+	recording symbol information.
+
 2020-05-09  Ian Lance Taylor  <iant@golang.org>
 
 	PR libbacktrace/88745
diff --git a/libbacktrace/elf.c b/libbacktrace/elf.c
index eb481c588e7..1216af86fd9 100644
--- a/libbacktrace/elf.c
+++ b/libbacktrace/elf.c
@@ -3011,6 +3011,7 @@ elf_add (struct backtrace_state *state, const char *filename, int descriptor,
 	 string table permanently.  */
       backtrace_release_view (state, &symtab_view, error_callback, data);
       symtab_view_valid = 0;
+      strtab_view_valid = 0;
 
       *found_sym = 1;