Eric Pouech : dbghelp: Fix erroneous string manipulation when said string is empty.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e05bac0fd56ea8cec0ba8f952197bdfbbbfb2e1a
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=e05bac0fd56ea8cec0ba8f952197bdfbbbfb2e1a

Author: Eric Pouech <eric.pouech at gmail.com>
Date:   Thu Sep  2 11:23:02 2021 +0200

dbghelp: Fix erroneous string manipulation when said string is empty.

Signed-off-by: Eric Pouech <eric.pouech at gmail.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/dbghelp/dwarf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/dbghelp/dwarf.c b/dlls/dbghelp/dwarf.c
index 0479f7c7401..6b4eb90c05a 100644
--- a/dlls/dbghelp/dwarf.c
+++ b/dlls/dbghelp/dwarf.c
@@ -2198,7 +2198,7 @@ static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
         traverse.data += rellen + 1;
         p = vector_add(&dirs, &ctx->pool);
 
-        if (*rel == '/' || !compile_dir)
+        if (*rel == '/' || !compile_dir || !*compile_dir)
             *p = rel;
         else
         {