diff options
Diffstat (limited to 'src/libexpr')
| -rw-r--r-- | src/libexpr/primops.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index a4812de065..3e955ea3fe 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -965,7 +965,7 @@ static void prim_substring(EvalState & state, Value * * args, Value & v) if (start < 0) throw EvalError("negative start position in `substring'"); - mkString(v, string(s, start, len), context); + mkString(v, start >= s.size() ? "" : string(s, start, len), context); } |