Anyone else failing to validate on 'linker_unload'?

[Ryan Newton]

That test builds an executable named 'linker_unload' which segfaults for
me.  Valgrind says this:


    ==42800== Invalid read of size 8
    ==42800==    at 0x66945F: checkUnload (in
/home/beehive/ryan_scratch/validate14/testsuite/tests/rts/linker_unload)
    ==42800==    by 0x657F7A: GarbageCollect (in
/home/beehive/ryan_scratch/validate14/testsuite/tests/rts/linker_unload)
    ==42800==    by 0x651790: scheduleDoGC (in
/home/beehive/ryan_scratch/validate14/testsuite/tests/rts/linker_unload)
    ==42800==    by 0x6518B4: performGC_ (in
/home/beehive/ryan_scratch/validate14/testsuite/tests/rts/linker_unload)
    ==42800==    by 0x403BB1: main (in
/home/beehive/ryan_scratch/validate14/testsuite/tests/rts/linker_unload)
    ==42800==  Address 0x5bfdd20 is 80 bytes inside a block of size 120
free'd
    ==42800==    at 0x4C273F0: free (vg_replace_malloc.c:446)
    ==42800==    by 0x66945E: checkUnload (in
/home/beehive/ryan_scratch/validate14/testsuite/tests/rts/linker_unload)
    ==42800==    by 0x657F7A: GarbageCollect (in
/home/beehive/ryan_scratch/validate14/testsuite/tests/rts/linker_unload)
    ==42800==    by 0x651790: scheduleDoGC (in
/home/beehive/ryan_scratch/validate14/testsuite/tests/rts/linker_unload)
    ==42800==    by 0x6518B4: performGC_ (in
/home/beehive/ryan_scratch/validate14/testsuite/tests/rts/linker_unload)
    ==42800==    by 0x403BB1: main (in
/home/beehive/ryan_scratch/validate14/testsuite/tests/rts/linker_unload)

This went the same across a couple different independent checkouts.

  -Ryan
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