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authorJoey Hess2016-06-02 18:27:23 -0400
committerJoey Hess2016-06-02 18:27:23 -0400
commitb0812d5abbb558a9ce7a05ec7778ff5f99658a1c (patch)
tree4f3d546e7b342f4aa998b4f784bad4f517a34d8f /doc/forum/recent_propellor_snapshots_cause_ghc_OOMs
parent6ff8ba7e80493edb1bfa4f993c56b99da264054a (diff)
parent432cbefafb4145525639acb20984d7c1beb33c0d (diff)
Merge branch 'joeyconfig'
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+[[!comment format=mdwn
+ username="joey"
+ subject="""comment 10"""
+ date="2016-06-02T22:14:23Z"
+ content="""
+Mistakes in the parameters of properties (leaving out a parameter, wrong type
+parameter, etc) don't cause these super-long error messages, even when the
+property is in the middle of a big block of other properties.
+
+The problem occurs only when a lot of properties have
+been combined together using `&` and used in an ill-typed way; in this situation
+ghc can't infer the a simple type for the combined properties, due to the use
+of type level functions to combine them.
+
+So, at least in this case, it doesn't seem to be a problem users are likely
+to hit except during the propellor 3.0 ugrade or if they forget to use
+`props` at some other time.
+"""]]