Eric Pouech : dbghelp: Check that we don't add same line number twice.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e105e9d35ee9f28f5a1615cd8f2b582ae8d82041
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=e105e9d35ee9f28f5a1615cd8...

Author: Eric Pouech 
Date:   Mon Nov  8 14:57:32 2021 +0100

dbghelp: Check that we don't add same line number twice.

This happens (at least) in dwarf debug info where there could be two entries
with same source file and line number, but different column numbers
(and we don't store columns).

Signed-off-by: Eric Pouech 
Signed-off-by: Alexandre Julliard

---

dlls/dbghelp/symbol.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/dlls/dbghelp/symbol.c b/dlls/dbghelp/symbol.c
index 7747aaae2ae..435d94bc8eb 100644
--- a/dlls/dbghelp/symbol.c
+++ b/dlls/dbghelp/symbol.c
@@ -418,6 +418,11 @@ void symt_add_func_line(struct module* module, struct symt_function* func,
     }
     vlen = vector_length(&func->vlines);
     prev = vlen ? vector_at(&func->vlines, vlen - 1) : NULL;
+    if (last_matches && prev && addr == prev->u.address)
+    {
+        WARN("Duplicate addition of line number in %s\n", func->hash_elt.name);
+        return;
+    }
     if (!last_matches)
     {
         /* we shouldn't have line changes on first line of function */