GHC devs, I wasn’t aware that we’d changed these. Anyone know why? Simon From: Haskell-Cafe [mailto:haskell-cafe-bounces@haskell.org] On Behalf Of Omari Norman Sent: 05 May 2015 15:55 To: haskell Cafe Subject: [Haskell-cafe] Significant changes in -Wall for GHC 7.10 I noticed some significant changes to the flags included with -Wall in GHC 7.10. Many flags that were previously included in -Wall are now not included. These include: -fwarn-type-defaults -fwarn-name-shadowing -fwarn-missing-signatures -fwarn-hi-shadowing -fwarn-orphans -fwarn-unused-do-bind -fwarn-trustworthy-safe I can't find any mention in the release notes of this change in behavior. I was wondering what the rationale is for these changes? Any link to relevant discussion would be appreciated if it exists. Also, what opinion do people have? I previously kept my code -Wall clean, but sometimes that would be a pain. For instance I would munge local names so they wouldn't trigger -fwarn-name-shadowing, and I would add signatures to integers so they wouldn't trigger -fwarn-type-defaults. In fact, I only noticed this change in behavior in 7.10 because I was considering dumping -Wall, and when I looked at the 7.10 manual I saw that it does not enable -fwarn-name-shadowing. (I still use 7.8 but Google pulled the 7.10 manual.) Does this change indicate that people were finding -Wall too onerous and, thus, not using it? I do remember reading complaints about -fwarn-unused-do-bind being added to -Wall, but I previously felt dirty about name shadowing though I wondered if munging names to avoid shadowing was actually worse.