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-rw-r--r--gcc/opts-common.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/opts-common.cc b/gcc/opts-common.cc
index 1663be1..8097c05 100644
--- a/gcc/opts-common.cc
+++ b/gcc/opts-common.cc
@@ -1347,6 +1347,8 @@ candidates_list_and_hint (const char *arg, char *&str,
const char *candidate;
char *p;
+ gcc_assert (!candidates.is_empty ());
+
FOR_EACH_VEC_ELT (candidates, i, candidate)
len += strlen (candidate) + 1;