#11746: I encountered an: internal error: evacuate: strange closure type 803645000 -------------------------------+-------------------------------------- Reporter: hkBst | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: GHCi crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------+-------------------------------------- Comment (by hkBst): The last command and output for when this happened. Unfortunately I cannot reproduce. {{{ *Main> :main 6 White to play: /---V---V---\ | |<K>| | D---+---+---C | | | | D---+---+---C | | K | | \---A---A---/ [0,3,-5,3,-3,3] Black to play: /---V---V---\ | |<K>| | D---+---+---C | | | | D---+---+---C | K | | | \---A---A---/ [2,5,-3,3,-3,5] White to play: /---V---V---\ |<K>| | | D---+---+---C | | | | D---+---+---C | K | | | \---A---A---/ [0,5,-3,3,-5,3] Black to play: /---V---V---\ |<K>| | | D---+---+---C | | | | D---+---+---C | | K | | \---A---A---/ [-2,3,-3,5,-3,3] <interactive>: internal error: evacuate: strange closure type 803645000 (GHC version 7.10.3 for x86_64_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug Aborted }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11746#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#11746: I encountered an: internal error: evacuate: strange closure type 803645000 -------------------------------+-------------------------------------- Reporter: hkBst | Owner: Type: bug | Status: new Priority: high | Milestone: 8.0.1 Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: GHCi crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------+-------------------------------------- Comment (by bgamari): Reproducing in gdb reveals this, {{{ (gdb) bt #0 0x00007fffecd46507 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55 #1 0x00007fffecd478da in __GI_abort () at abort.c:89 #2 0x00007fffed2f4302 in rtsFatalInternalErrorFn (s=<optimized out>, ap=0x7fffeb38dba8) at rts/RtsMessages.c:182 #3 0x00007fffed2f4460 in barf (s=s@entry=0x7fffed31ab80 "evacuate: strange closure type %d") at rts/RtsMessages.c:46 #4 0x00007fffed2df88e in evacuate (p=p@entry=0x204ed00a8) at rts/dist/build/sm/Evac_thr.c:740 #5 0x00007fffed2fe711 in tidyWeakList (gen=<optimized out>) at rts/sm/MarkWeak.c:270 #6 0x00007fffed2fea08 in traverseWeakPtrList () at rts/sm/MarkWeak.c:130 #7 0x00007fffed300332 in GarbageCollect (collect_gen=collect_gen@entry=1, do_heap_census=do_heap_census@entry=rtsFalse, gc_type=gc_type@entry=2, cap=cap@entry=0x7fffed52ad00 <MainCapability>) at rts/sm/GC.c:409 #8 0x00007fffed2f1d51 in scheduleDoGC (pcap=pcap@entry=0x7fffeb38deb0, task=task@entry=0x7af4f0, force_major=force_major@entry=rtsFalse) at rts/Schedule.c:1652 #9 0x00007fffed2f294e in schedule (initialCapability=<optimized out>, task=task@entry=0x7af4f0) at rts/Schedule.c:551 #10 0x00007fffed2f3a5c in scheduleWorker (cap=<optimized out>, task=0x7af4f0) at rts/Schedule.c:2378 #11 0x00007ffff738c284 in start_thread (arg=0x7fffeb38e700) at pthread_create.c:333 #12 0x00007fffecdfba4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 }}} It appears this is weak-pointer related. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11746#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#11746: I encountered an: internal error: evacuate: strange closure type 803645000 -------------------------------+-------------------------------------- Reporter: hkBst | Owner: Type: bug | Status: new Priority: high | Milestone: 8.0.1 Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: GHCi crash | Test Case: Blocked By: | Blocking: Related Tickets: #11108 | Differential Rev(s): Wiki Page: | -------------------------------+-------------------------------------- Changes (by jme): * related: => #11108 Comment: This appears to be the same issue as #11108. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11746#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#11746: I encountered an: internal error: evacuate: strange closure type 803645000 -------------------------------+-------------------------------------- Reporter: hkBst | Owner: Type: bug | Status: closed Priority: high | Milestone: 8.0.1 Component: Compiler | Version: 7.10.3 Resolution: duplicate | Keywords: Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: GHCi crash | Test Case: Blocked By: | Blocking: Related Tickets: #11108 | Differential Rev(s): Wiki Page: | -------------------------------+-------------------------------------- Comment (by Ben Gamari ): In [changeset:"9363f04d0ff22f3d898af35bb5432c4287e6dc9a/ghc" 9363f04/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="9363f04d0ff22f3d898af35bb5432c4287e6dc9a" Handle promotion failures when scavenging a WEAK (#11108) Previously, we ignored promotion failures when evacuating fields of a WEAK object. When a failure happens, this resulted in an WEAK object pointing to another object in a younger generation, causing crashes. I used the test case from #11746 to check that the fix is working. However I haven't managed to produce a test case that quickly reproduces the issue. Test Plan: ./validate Reviewers: austin, bgamari, simonmar Reviewed By: simonmar Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2189 GHC Trac Issues: #11108 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11746#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler