Running 1 twice, followed by a typed hole, in GHCi causes internal error
Originally reported in #14996 (closed)##15037 (closed). You need GHC HEAD (i.e., more recent than GHC 8.4.1) to trigger this:
$ inplace/bin/ghc-stage2 --interactive
GHCi, version 8.5.20180413: http://www.haskell.org/ghc/ :? for help
Loaded GHCi configuration from /home/rgscott/.ghci
λ> 1
1
λ> 1
1
λ> _
<interactive>:1:1: error:
GHC internal error: ‘Ghci1.it’ is not in scope during type checking, but it passed the renamer
tcl_env of environment: []
And yes, running 1
//twice// seems to be critical to triggering this bug, for some reason.
Trac metadata
Trac field | Value |
---|---|
Version | 8.5 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | GHCi |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |