.boot modules interact badly with the ghci debugger
If a boot module is loaded after its normal counterpart, which can happen, the module ends up with empty modBreaks info, which leads to errors while debugging. It looks like boot modules take the place of their normal counterparts in the HomePackageTable perhaps? An example:
GHCi, version 6.7.20070826: http://www.haskell.org/ghc/ :? for help
Loading package base ... linking ... done.
Prelude> :l C
[1 of 4] Compiling B[boot] ( B.hs-boot, interpreted )
[2 of 4] Compiling A ( A.hs, interpreted )
[3 of 4] Compiling B ( B.hs, interpreted )
[4 of 4] Compiling C ( C.hs, interpreted )
Ok, modules loaded: B, B, C, A.
*C> :! touch A.hs
*C> :r
[1 of 4] Compiling B[boot] ( B.hs-boot, interpreted )
[2 of 4] Compiling A ( A.hs, interpreted )
Ok, modules loaded: B, B, C, A.
*C> :break a
Breakpoint 0 activated at A.hs:4:0-8
*C> a ()
Stopped at A.hs:4:0-8
_result :: a = _
3
4 a x = b x
[A.hs:4:0-8] *C> :st
Stopped at A.hs:4:6-8
_result :: () = _
x :: () = ()
3
4 a x = b x
[A.hs:4:6-8] *C> :st
*** Exception: Error in array indexTrac metadata
| Trac field | Value |
|---|---|
| Version | 6.7 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | high |
| Resolution | Unresolved |
| Component | GHCi |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | mnislaih@gmail.com |
| Operating system | Unknown |
| Architecture | Unknown |