#10375: arm: ghci hits an illegal instruction -------------------------------------+------------------------------------- Reporter: erikd | Owner: Type: bug | Status: new Priority: high | Milestone: 7.10.3 Component: Runtime System | Version: 7.10.1 (Linker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: arm Type of failure: GHCi crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by erikd): When compiler in Registerised mode, `inplace/bin/ghc-stage2 --interactive` basically works. I can import modules, I can print things etc. Everything works fine until: {{{ Prelude> data X = X | Y deriving Eq Prelude> X == X Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0xb59ff460 (LWP 29599)] 0xb6ff0024 in ?? () (gdb) bt #0 0xb6ff0024 in ?? () #1 0x70000000 in ?? () Backtrace stopped: previous frame identical to this frame (corrupt stack?) (gdb) disass 0xb6ff0020,+0x30 Dump of assembler code from 0xb6ff0020 to 0xb6ff0050: 0xb6ff0020: ldrbvs r6, [r4, #-3689]! ; 0xe69 => 0xb6ff0024: strbtvc r6, [r3], #-370 ; 0x172 0xb6ff0028: bcc 0xb894d9d4 0xb6ff002c: stmdbvs r3!, {r0, r1, r2, r6, r11, sp, lr}^ 0xb6ff0030: subseq r2, r8, r1, lsr lr 0xb6ff0034: andeq r0, r0, r3, lsr r0 0xb6ff0038: ; <UNDEFINED> instruction: 0xb6ff0038 0xb6ff003c: andeq r0, r0, r8 0xb6ff0040: andeq r0, r1, r0 0xb6ff0044: andeq r0, r1, r1 0xb6ff0048: stmdaeq r7, {r0, r3, r6}^ 0xb6ff004c: strdeq r12, [r6, #208]! ; 0xd0 End of assembler dump. (gdb) info registers r0 0xb6ff0018 3070165016 r1 0x28 40 r2 0x1 1 r3 0x70000000 1879048192 r4 0x2350b50 37030736 r5 0xb38c4a0c 3012315660 r6 0xb5187d24 3038280996 r7 0xb38c4b30 3012315952 r8 0xb2ad2c38 2997693496 r9 0x7fffffff 2147483647 r10 0x1e6cef4 31903476 r11 0xb38c4750 3012314960 r12 0x235036c 37028716 sp 0xb59fcd70 0xb59fcd70 lr 0x70000000 1879048192 pc 0xb6ff0024 0xb6ff0024 cpsr 0x400f0010 1074724880 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10375#comment:53 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler