diff options
Diffstat (limited to 'src/libexpr')
| -rw-r--r-- | src/libexpr/primops.cc | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index 10ce1abf5..32ce00bbc 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -832,8 +832,14 @@ static void prim_pathExists(EvalState & state, const Pos & pos, Value * * args, { PathSet context; Path path = state.coerceToPath(pos, *args[0], context); - if (!context.empty()) - throw EvalError(format("string '%1%' cannot refer to other paths, at %2%") % path % pos); + try { + state.realiseContext(context); + } catch (InvalidPathError & e) { + throw EvalError(format( + "cannot check the existence of '%1%', since path '%2%' is not valid, at %3%") + % path % e.path % pos); + } + try { mkBool(v, pathExists(state.checkSourcePath(path))); } catch (SysError & e) { |