_result can get bound to the wrong value in a breakpoint

Using test result001 in the example below. :list shows that the tick is wrapping map id xs (it is not appreciated here, but the said subexpression is highlighted in ghci).

However _result seems to be bound to the value of f xs

*Main> :b 1 20
Breakpoint 1 activated at result001.hs:1:12-20
*Main> f "abc"
Stopped at result001.hs:1:12-20
_result :: Bool
xs :: [a]
... [result001.hs:1:12-20] *Main> :list
1  f xs = case map id xs of
2           [] -> True
... [result001.hs:1:12-20] *Main> :fo _result
*** Ignoring breakpoint
_result = False

Trac metadata

Trac field	Value
Version	6.6.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	low
Resolution	Unresolved
Component	GHCi
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Unknown
Architecture	Unknown