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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/debugging.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/users_guide/debugging.rst b/docs/users_guide/debugging.rst index 80c9f8d3bf..a7bbbb5e0b 100644 --- a/docs/users_guide/debugging.rst +++ b/docs/users_guide/debugging.rst @@ -333,6 +333,12 @@ Checking for consistency Ditto for C-- level. +.. ghc-flag:: -fllvm-fill-undef-with-garbage + + Instructs the LLVM code generator to fill dead STG registers with garbage + instead of ``undef`` in calls. This makes it easier to catch subtle + code generator and runtime system bugs (e.g. see :ghc-ticket:`11487`). + .. _checking-determinism: Checking for determinism |