diff options
Diffstat (limited to 'src/libexpr/primops.cc')
| -rw-r--r-- | src/libexpr/primops.cc | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index d4a83cafe4fe..7dddc91a86ab 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -256,7 +256,12 @@ static Expr prim_getEnv(EvalState & state, const ATermVector & args) static Expr prim_trace(EvalState & state, const ATermVector & args) { Expr e = evalExpr(state, args[0]); - printMsg(lvlError, format("trace: %1%") % e); + string s; + PathSet context; + if (matchStr(e, s, context)) + printMsg(lvlError, format("trace: %1%") % s); + else + printMsg(lvlError, format("trace: %1%") % e); return evalExpr(state, args[1]); } |