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-rw-r--r--docs/users_guide/debugging.rst7
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/users_guide/debugging.rst b/docs/users_guide/debugging.rst
index b1612f4536..d8a024dde4 100644
--- a/docs/users_guide/debugging.rst
+++ b/docs/users_guide/debugging.rst
@@ -68,6 +68,13 @@ Dumping out compiler intermediate structures
Show statistics on the usage of fast strings by the compiler.
+.. ghc-flag:: -ddump-faststrings
+ :shortdesc: Dump the whole FastString table when finished
+ :type: dynamic
+
+ Dump the whole FastString table when finished. Consider using
+ :ghc-flag:`-ddump-file-prefix=⟨str⟩` to dump it into a file.
+
.. ghc-flag:: -dppr-debug
:shortdesc: Turn on debug printing (more verbose)
:type: dynamic