Panic: RegAlloc.Liveness.computeLivenss; SCCs aren't in reverse dependent order; bad blockId c8xHd
I’ve found another instance of the elusive RegAlloc.Liveness.computeLivenss bug, by attempting to bootstrap cabal-install 1.20.0.6 with GHC 7.8.4 on 32-bit CentOS 6, released on 27/05/2013 (available on Amazon EC2).
Unfortunately, I’m unable to reproduce the bug on a subsequent attempt. Cosmic rays?
Configuring text-1.1.0.1...
Building text-1.1.0.1...
Preprocessing library text-1.1.0.1...
[ 1 of 43] Compiling Data.Text.Internal.Read ( Data/Text/Internal/Read.hs, dist/build/Data/Text/Internal/Read.o )
[ 2 of 43] Compiling Data.Text.Internal.Encoding.Utf32 ( Data/Text/Internal/Encoding/Utf32.hs, dist/build/Data/Text/Internal/Encoding/Utf32.o )
[ 3 of 43] Compiling Data.Text.Internal.Fusion.Size ( Data/Text/Internal/Fusion/Size.hs, dist/build/Data/Text/Internal/Fusion/Size.o )
[ 4 of 43] Compiling Data.Text.Internal.Builder.RealFloat.Functions ( Data/Text/Internal/Builder/RealFloat/Functions.hs, dist/build/Data/Text/Internal/Builder/RealFloat/Functions.o )
[ 5 of 43] Compiling Data.Text.Internal.Builder.Int.Digits ( Data/Text/Internal/Builder/Int/Digits.hs, dist/build/Data/Text/Internal/Builder/Int/Digits.o )
[ 6 of 43] Compiling Data.Text.Internal.Fusion.Types ( Data/Text/Internal/Fusion/Types.hs, dist/build/Data/Text/Internal/Fusion/Types.o )
[ 7 of 43] Compiling Data.Text.Internal.Fusion.CaseMapping ( Data/Text/Internal/Fusion/CaseMapping.hs, dist/build/Data/Text/Internal/Fusion/CaseMapping.o )
[ 8 of 43] Compiling Data.Text.Encoding.Error ( Data/Text/Encoding/Error.hs, dist/build/Data/Text/Encoding/Error.o )
[ 9 of 43] Compiling Data.Text.Internal.Unsafe.Shift ( Data/Text/Internal/Unsafe/Shift.hs, dist/build/Data/Text/Internal/Unsafe/Shift.o )
[10 of 43] Compiling Data.Text.Internal.Encoding.Utf16 ( Data/Text/Internal/Encoding/Utf16.hs, dist/build/Data/Text/Internal/Encoding/Utf16.o )
[11 of 43] Compiling Data.Text.Internal.Functions ( Data/Text/Internal/Functions.hs, dist/build/Data/Text/Internal/Functions.o )
[12 of 43] Compiling Data.Text.Internal.Unsafe ( Data/Text/Internal/Unsafe.hs, dist/build/Data/Text/Internal/Unsafe.o )
[13 of 43] Compiling Data.Text.Internal.Fusion.Common ( Data/Text/Internal/Fusion/Common.hs, dist/build/Data/Text/Internal/Fusion/Common.o )
[14 of 43] Compiling Data.Text.Array ( Data/Text/Array.hs, dist/build/Data/Text/Array.o )
[15 of 43] Compiling Data.Text.Internal.Unsafe.Char ( Data/Text/Internal/Unsafe/Char.hs, dist/build/Data/Text/Internal/Unsafe/Char.o )
[16 of 43] Compiling Data.Text.Internal ( Data/Text/Internal.hs, dist/build/Data/Text/Internal.o )
[17 of 43] Compiling Data.Text.Unsafe ( Data/Text/Unsafe.hs, dist/build/Data/Text/Unsafe.o )
[18 of 43] Compiling Data.Text.Internal.Private ( Data/Text/Internal/Private.hs, dist/build/Data/Text/Internal/Private.o )
[19 of 43] Compiling Data.Text.Internal.Fusion ( Data/Text/Internal/Fusion.hs, dist/build/Data/Text/Internal/Fusion.o )
[20 of 43] Compiling Data.Text.Internal.Encoding.Fusion.Common ( Data/Text/Internal/Encoding/Fusion/Common.hs, dist/build/Data/Text/Internal/Encoding/Fusion/Common.o )
[21 of 43] Compiling Data.Text.Internal.Encoding.Utf8 ( Data/Text/Internal/Encoding/Utf8.hs, dist/build/Data/Text/Internal/Encoding/Utf8.o )
[22 of 43] Compiling Data.Text.Internal.Encoding.Fusion ( Data/Text/Internal/Encoding/Fusion.hs, dist/build/Data/Text/Internal/Encoding/Fusion.o )
[23 of 43] Compiling Data.Text.Internal.Lazy.Encoding.Fusion ( Data/Text/Internal/Lazy/Encoding/Fusion.hs, dist/build/Data/Text/Internal/Lazy/Encoding/Fusion.o )
[24 of 43] Compiling Data.Text.Internal.Search ( Data/Text/Internal/Search.hs, dist/build/Data/Text/Internal/Search.o )
[25 of 43] Compiling Data.Text ( Data/Text.hs, dist/build/Data/Text.o )
[26 of 43] Compiling Data.Text.Encoding ( Data/Text/Encoding.hs, dist/build/Data/Text/Encoding.o )
[27 of 43] Compiling Data.Text.Foreign ( Data/Text/Foreign.hs, dist/build/Data/Text/Foreign.o )
[28 of 43] Compiling Data.Text.Internal.IO ( Data/Text/Internal/IO.hs, dist/build/Data/Text/Internal/IO.o )
[29 of 43] Compiling Data.Text.IO ( Data/Text/IO.hs, dist/build/Data/Text/IO.o )
[30 of 43] Compiling Data.Text.Internal.Lazy ( Data/Text/Internal/Lazy.hs, dist/build/Data/Text/Internal/Lazy.o )
[31 of 43] Compiling Data.Text.Internal.Lazy.Fusion ( Data/Text/Internal/Lazy/Fusion.hs, dist/build/Data/Text/Internal/Lazy/Fusion.o )
[32 of 43] Compiling Data.Text.Internal.Lazy.Search ( Data/Text/Internal/Lazy/Search.hs, dist/build/Data/Text/Internal/Lazy/Search.o )
[33 of 43] Compiling Data.Text.Lazy.Internal ( Data/Text/Lazy/Internal.hs, dist/build/Data/Text/Lazy/Internal.o )
[34 of 43] Compiling Data.Text.Lazy ( Data/Text/Lazy.hs, dist/build/Data/Text/Lazy.o )
[35 of 43] Compiling Data.Text.Internal.Builder ( Data/Text/Internal/Builder.hs, dist/build/Data/Text/Internal/Builder.o )
[36 of 43] Compiling Data.Text.Lazy.Builder ( Data/Text/Lazy/Builder.hs, dist/build/Data/Text/Lazy/Builder.o )
[37 of 43] Compiling Data.Text.Internal.Builder.Functions ( Data/Text/Internal/Builder/Functions.hs, dist/build/Data/Text/Internal/Builder/Functions.o )
[38 of 43] Compiling Data.Text.Lazy.Builder.Int ( Data/Text/Lazy/Builder/Int.hs, dist/build/Data/Text/Lazy/Builder/Int.o )
[39 of 43] Compiling Data.Text.Lazy.IO ( Data/Text/Lazy/IO.hs, dist/build/Data/Text/Lazy/IO.o )
[40 of 43] Compiling Data.Text.Lazy.Read ( Data/Text/Lazy/Read.hs, dist/build/Data/Text/Lazy/Read.o )
[41 of 43] Compiling Data.Text.Lazy.Builder.RealFloat ( Data/Text/Lazy/Builder/RealFloat.hs, dist/build/Data/Text/Lazy/Builder/RealFloat.o )
ghc: panic! (the 'impossible' happened)
(GHC version 7.8.4 for i386-unknown-linux):
RegAlloc.Liveness.computeLivenss
SCCs aren't in reverse dependent order
bad blockId c8xHd
[NONREC
c8xHG: jmp *-4(%ebx),
NONREC
c8xHF:
movl $12,828(%ebx)
jmp *stg_gc_unpt_r1@got(%vI_n8Wmo),
NONREC
c8xHE:
movl %vI_n8Wmo,%vI_n8WmH
addl $sat_s8qTs{v}_info@gotoff,%vI_n8WmH
movl %vI_n8WmH,-8(%edi)
movl 4(%ebp),%vI_n8WmI
movl %vI_n8WmI,-4(%edi)
movl 16(%ebp),%vI_n8WmJ
movl %vI_n8WmJ,(%edi)
leal -7(%edi),%esi
addl $20,%ebp
jmp *(%ebp),
NONREC
c8xHz:
movl $48,828(%ebx)
movl %vI_n8Wmo,%vI_n8WmF
addl $block{v c8xEh}_info@gotoff,%vI_n8WmF
movl %vI_n8WmF,(%ebp)
movl %vI_s8qTz,%esi
movl %vI_s8qTx,4(%ebp)
jmp *stg_gc_unbx_r1@got(%vI_n8Wmo),
NONREC
c8xHq:
movl %vI_c8xEw,%esi
incl 8(%ebp)
addl $8,%ebp
jmp *stg_ap_n_fast@got(%vI_n8Wmo),
NONREC
c8xHp:
movl %vI_c8xEw,%esi
addl $8,%ebp
jmp *stg_ap_n_fast@got(%vI_n8Wmo),
NONREC
c8xHi: jmp *(%esi),
NONREC
c8xGZ:
call 1f
1: popl %vI_n8Wmo
addl $_GLOBAL_OFFSET_TABLE_+(.-1b), %vI_n8Wmo
movl 4(%ebp),%vI_c8xEw
movl %esi,%vI_n8Wmw
andl $3,%vI_n8Wmw
cmpl $2,%vI_n8Wmw
jae _c8xHp
jmp _c8xHq,
NONREC
c8xHy:
movl %vI_n8Wmo,%vI_n8Wmy
addl $lvl65{v s8qTB}_info@gotoff,%vI_n8Wmy
movl %vI_n8Wmy,-44(%edi)
movl %vI_s8qTz,-36(%edi)
movl %vI_n8Wmo,%vI_n8WmA
addl $a28{v s8qTD}_info@gotoff,%vI_n8WmA
movl %vI_n8WmA,-32(%edi)
movl %vI_s8qTd,-28(%edi)
movl %vI_s8qTh,-24(%edi)
movl %vI_s8qTk,-20(%edi)
movl %vI_s8qTx,-16(%edi)
leal -44(%edi),%vI_c8xEn
movl %vI_c8xEn,-12(%edi)
movl %vI_s8qRK,-8(%edi)
movl %vI_s8qTj,-4(%edi)
movl %vI_s8qTz,(%edi)
movl %vI_n8Wmo,%vI_n8WmC
addl $block{v c8xGZ}_info@gotoff,%vI_n8WmC
movl %vI_n8WmC,16(%ebp)
movl %vI_c8xEn,%esi
leal -30(%edi),%vI_n8WmD
movl %vI_n8WmD,20(%ebp)
addl $16,%ebp
testl $3,%esi
jne _c8xGZ
jmp _c8xHi,
NONREC
c8xGX:
addl $12,%edi
cmpl 804(%ebx),%edi
ja _c8xHF
jmp _c8xHE,
NONREC
c8xEi:
addl $48,%edi
cmpl 804(%ebx),%edi
ja _c8xHz
jmp _c8xHy,
NONREC
c8xHe:
movl %esi,%vI_s8qTx
movl $65533,%vI_s8qTz
jmp _c8xEi,
NONREC
c8xEh:
call 1f
1: popl %vI_n8Wmo
addl $_GLOBAL_OFFSET_TABLE_+(.-1b), %vI_n8Wmo
movl 20(%ebp),%vI_s8qRK
movl 12(%ebp),%vI_s8qTd
movl 16(%ebp),%vI_s8qTh
movl 24(%ebp),%vI_s8qTj
movl 8(%ebp),%vI_s8qTk
movl 4(%ebp),%vI_s8qTx
movl %esi,%vI_s8qTz
jmp _c8xEi,
NONREC
c8xEb: jmp *(%esi),
NONREC
c8xEa:
call 1f
1: popl %vI_n8Wmo
addl $_GLOBAL_OFFSET_TABLE_+(.-1b), %vI_n8Wmo
movl 20(%ebp),%vI_s8qRK
movl 12(%ebp),%vI_s8qTd
movl 16(%ebp),%vI_s8qTh
movl 24(%ebp),%vI_s8qTj
movl 8(%ebp),%vI_s8qTk
movl 4(%ebp),%vI_s8qTw
movl %vI_s8qTw,%vI_n8Wms
andl $2095104,%vI_n8Wms
cmpl $55296,%vI_n8Wms
jne _c8xHd
jmp _c8xHe,
NONREC
c8xE6: jmp *(%esi),
NONREC
c8xE5:
call 1f
1: popl %vI_n8Wmo
addl $_GLOBAL_OFFSET_TABLE_+(.-1b), %vI_n8Wmo
movl %vI_n8Wmo,%vI_n8Wmq
addl $block{v c8xEa}_info@gotoff,%vI_n8Wmq
movl %vI_n8Wmq,(%ebp)
movl 3(%esi),%vI_s8qTw
movl 4(%ebp),%esi
movl %vI_s8qTw,4(%ebp)
testl $3,%esi
jne _c8xEa
jmp _c8xEb,
NONREC
c8xGW:
movl %vI_n8Wmo,%vI_n8Wmu
addl $block{v c8xE5}_info@gotoff,%vI_n8Wmu
movl %vI_n8Wmu,-8(%ebp)
movl %esi,%vI_s8qTk
movl 6(%esi),%vI_s8qTu
movl 2(%esi),%esi
movl %vI_s8qTu,-4(%ebp)
movl %vI_s8qTk,(%ebp)
addl $-8,%ebp
testl $3,%esi
jne _c8xE5
jmp _c8xE6,
NONREC
c8xDC: jmp *(%esi),
NONREC
c8xDB:
call 1f
1: popl %vI_n8Wmo
addl $_GLOBAL_OFFSET_TABLE_+(.-1b), %vI_n8Wmo
movl %esi,%vI_n8Wmn
andl $3,%vI_n8Wmn
cmpl $2,%vI_n8Wmn
jae _c8xGW
jmp _c8xGX,
NONREC
c8xHH:
movl %vI_n8Wmo,%vI_n8WmL
addl $block{v c8xDB}_info@gotoff,%vI_n8WmL
movl %vI_n8WmL,-12(%ebp)
movl %esi,%vI_s8qTh
movl 2(%esi),%vI_s8qTd
movl 6(%esi),%vI_s8qRK
movl (%ebp),%esi
movl %vI_s8qTd,-8(%ebp)
movl %vI_s8qTh,-4(%ebp)
movl %vI_s8qRK,(%ebp)
addl $-12,%ebp
testl $3,%esi
jne _c8xDB
jmp _c8xDC,
NONREC
c8xGY:
call 1f
1: popl %vI_n8Wmo
addl $_GLOBAL_OFFSET_TABLE_+(.-1b), %vI_n8Wmo
leal -20(%ebp),%vI_n8Wml
cmpl 796(%ebx),%vI_n8Wml
jb _c8xHG
jmp _c8xHH]Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.8.4 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |