PGFService: make the restriction on parallelism more effective

Restrict the entire request handler instead of just the call to the C parser.

1 files changed, 2 insertions, 1 deletions

diff --git a/gf.cabal b/gf.cabal
index 1b7f5aee6..7b6ee0435 100644
--- a/gf.cabal
+++ b/gf.cabal
@@ -76,7 +76,8 @@ Library
                  utf8-string,
                  random,
                  pretty,
-                 mtl
+                 mtl,
+                 exceptions
   hs-source-dirs: src/runtime/haskell
 
   if flag(custom-binary)