forceValue: make pos mandatory

- Make passing the position to `forceValue` mandatory,
  this way we remember people that the position is
  important for better error messages
- Add pos to all `forceValue` calls

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index 82ce9d1b3..f0b94f440 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -221,7 +221,7 @@ public:
        of the evaluation of the thunk.  If `v' is a delayed function
        application, call the function and overwrite `v' with the
        result.  Otherwise, this is a no-op. */
-    inline void forceValue(Value & v, const Pos & pos = noPos);
+    inline void forceValue(Value & v, const Pos & pos);
 
     /* Force a value, then recursively force list elements and
        attributes. */