diff options
Diffstat (limited to 'compiler/hsSyn/HsUtils.lhs')
| -rw-r--r-- | compiler/hsSyn/HsUtils.lhs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/compiler/hsSyn/HsUtils.lhs b/compiler/hsSyn/HsUtils.lhs index 5d7132ec74..b0978ec649 100644 --- a/compiler/hsSyn/HsUtils.lhs +++ b/compiler/hsSyn/HsUtils.lhs @@ -428,7 +428,10 @@ collect_pat other acc = acc -- Literals, vars, wildcard getMainDeclBinder :: HsDecl name -> Maybe name getMainDeclBinder (TyClD d) = Just (tcdName d) -getMainDeclBinder (ValD d) = Just ((unLoc . head) (collectAcc d [])) +getMainDeclBinder (ValD d) + = case collectAcc d [] of + [] -> Nothing -- see rn003 + (name:_) -> Just (unLoc name) getMainDeclBinder (SigD d) = sigNameNoLoc d getMainDeclBinder (ForD (ForeignImport name _ _)) = Just (unLoc name) getMainDeclBinder (ForD (ForeignExport name _ _)) = Just (unLoc name) |