https://bugzilla.redhat.com/show_bug.cgi?id=1170810#32

Signed-off-by: Mark Wielaard <[email protected]>
---
 src/nm.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/nm.c b/src/nm.c
index b6a1e6e..7d20bbb 100644
--- a/src/nm.c
+++ b/src/nm.c
@@ -1297,11 +1297,10 @@ show_symbols (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn, 
Elf_Scn *xndxscn,
                          /* We found the line.  */
                          int lineno;
                          (void) dwarf_lineno (line, &lineno);
+                         const char *file = dwarf_linesrc (line, NULL, NULL);
+                         file = (file != NULL) ? basename (file) : "???";
                          int n;
-                         n = obstack_printf (&whereob, "%s:%d%c",
-                                             basename (dwarf_linesrc (line,
-                                                                      NULL,
-                                                                      NULL)),
+                         n = obstack_printf (&whereob, "%s:%d%c", file,
                                              lineno, '\0');
                          sym_mem[nentries_used].where
                            = obstack_finish (&whereob);
-- 
2.1.0

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