[project @ 2000-05-13 00:20:57 by lewie]

[ghc-hetmet.git] / ghc / compiler / typecheck / TcBinds.lhs

diff --git a/ghc/compiler/typecheck/TcBinds.lhs b/ghc/compiler/typecheck/TcBinds.lhs
index 1a36051..b252aca 100644 (file)
--- a/ghc/compiler/typecheck/TcBinds.lhs
+++ b/ghc/compiler/typecheck/TcBinds.lhs
@@ -259,7 +259,10 @@ tcBindWithSigs top_lvl mbind tc_ty_sigs inline_sigs is_rec
        -- come before:
        --   - computing vars over which to quantify
        --   - zonking the generalized type vars
-    tcImprove lie_req `thenTc_`
+    let lie_avail = case maybe_sig_theta of
+                     Nothing      -> emptyLIE
+                     Just (_, la) -> la in
+    tcImprove (lie_avail `plusLIE` lie_req)                    `thenTc_`
 
        -- COMPUTE VARIABLES OVER WHICH TO QUANTIFY, namely tyvars_to_gen
        -- The tyvars_not_to_gen are free in the environment, and hence