[racket] Dr. Racket fails to startup on OS X Lion

Hi. Dr. Racket stopped working after my upgrade to OS X Lion.  Below is the
detail report from the most recent failed application startup.

-----

Process:         DrRacket [1492]
Path:            /Applications/Racket
v5.1.1/DrRacket.app/Contents/MacOS/DrRacket
Identifier:      org.racket-lang.DrRacket
Version:         5.1.1 (5.1.1)
Code Type:       X86 (Native)
Parent Process:  launchd [267]

Date/Time:       2011-07-23 21:57:31.515 -0700
OS Version:      Mac OS X 10.7 (11A511)
Report Version:  9

Interval Since Last Report:          69847 sec
Crashes Since Last Report:           5
Per-App Crashes Since Last Report:   4
Anonymous UUID:                      2BE4AE0A-90CD-43F2-BE56-7BC267209734

Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000000

VM Regions Near 0:
--> __PAGEZERO             0000000000000000-0000000000001000 [    4K]
---/--- SM=NUL  /Applications/Racket
v5.1.1/DrRacket.app/Contents/MacOS/DrRacket
    __TEXT                 0000000000001000-0000000000008000 [   28K]
r-x/rwx SM=COW  /Applications/Racket
v5.1.1/DrRacket.app/Contents/MacOS/DrRacket

Application Specific Information:
objc[1492]: garbage collection is OFF

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   Racket                         0x0000f0ab scheme_main_stack_setup + 43
1   org.racket-lang.DrRacket       0x00003616 main + 54
2   org.racket-lang.DrRacket       0x00003312 _start + 216
3   org.racket-lang.DrRacket       0x00003239 start + 41

Thread 0 crashed with X86 Thread State (32-bit):
  eax: 0x00000102  ebx: 0x0000f089  ecx: 0x00000102  edx: 0x00000000
  edi: 0xbffffd40  esi: 0xbffffd7c  ebp: 0xbffffca8  esp: 0xbffffc70
   ss: 0x00000023  efl: 0x00010246  eip: 0x0000f0ab   cs: 0x0000001b
   ds: 0x00000023   es: 0x00000023   fs: 0x00000000   gs: 0x0000000f
  cr2: 0x00000000
Logical CPU: 1

Binary Images:
    0x1000 -     0x7ff7 +org.racket-lang.DrRacket (5.1.1 - 5.1.1)
<E0F27CCB-B90E-BC7F-57DF-C7C533F53D31> /Applications/Racket
v5.1.1/DrRacket.app/Contents/MacOS/DrRacket
    0xe000 -   0x255fef +Racket (??? - ???)
<F6EDAF27-6D64-01B1-FCD2-0FD279D5DD11> /Applications/Racket
v5.1.1/*/Racket.framework/Versions/5.1.1_3m/Racket
0x8fef2000 - 0x8ff249c7  dyld (195.5 - ???)
<134323A7-49DC-3A9D-ACFD-32FAD0FD6BA2> /usr/lib/dyld
0x9006e000 - 0x9006fff5  libremovefile.dylib (21.0.0 - compatibility 1.0.0)
<9A1E12B7-F822-3544-8E1D-A6DC81E1F2E6> /usr/lib/system/libremovefile.dylib
0x9019a000 - 0x901caff7  libsystem_info.dylib (??? - ???)
<C385F5A9-458A-3B49-9CC7-EA81DC5F9141> /usr/lib/system/libsystem_info.dylib
0x90344000 - 0x90344fff  libdnsinfo.dylib (395.6.0 - compatibility 1.0.0)
<959E5139-EB23-3529-8881-2BCB5724D1A9> /usr/lib/system/libdnsinfo.dylib
0x91650000 - 0x9166eff7  libsystem_kernel.dylib (1699.22.73 - compatibility
1.0.0) <D32C2E9C-8184-3FAF-8694-99FC619FC71B>
/usr/lib/system/libsystem_kernel.dylib
0x91781000 - 0x91783ff7  libdyld.dylib (195.5.0 - compatibility 1.0.0)
<637660EA-8D12-3B79-B644-041FEADC9C33> /usr/lib/system/libdyld.dylib
0x91c44000 - 0x91c4cff3  liblaunch.dylib (392.18.0 - compatibility 1.0.0)
<CD470A1E-0147-3CB1-B44D-0B61F9061826> /usr/lib/system/liblaunch.dylib
0x923a2000 - 0x923abfff  libc++abi.dylib (14.0.0 - compatibility 1.0.0)
<FEB5330E-AD5D-37A0-8AB2-0820F311A2C8> /usr/lib/libc++abi.dylib
0x926e2000 - 0x926eaff3  libunwind.dylib (30.0.0 - compatibility 1.0.0)
<E8DA8CEC-12D6-3C8D-B2E2-5D567C8F3CB5> /usr/lib/system/libunwind.dylib
0x92c70000 - 0x92c73ff7  libcompiler_rt.dylib (6.0.0 - compatibility 1.0.0)
<7F6C14CC-0169-3F1B-B89C-372F67F1F3B5> /usr/lib/system/libcompiler_rt.dylib
0x9312d000 - 0x9312efff  libDiagnosticMessagesClient.dylib (??? - ???)
<DB3889C2-2FC2-3087-A2A2-4C319455E35C>
/usr/lib/libDiagnosticMessagesClient.dylib
0x93133000 - 0x93141fff  libz.1.dylib (1.2.5 - compatibility 1.0.0)
<E73A4025-835C-3F73-9853-B08606E892DB> /usr/lib/libz.1.dylib
0x93168000 - 0x93168ffe  libkeymgr.dylib (23.0.0 - compatibility 1.0.0)
<7F0E8EE2-9E8F-366F-9988-E2F119DB9A82> /usr/lib/system/libkeymgr.dylib
0x94164000 - 0x94165fff  libsystem_blocks.dylib (53.0.0 - compatibility
1.0.0) <B04592B1-0924-3422-82FF-976B339DF567>
/usr/lib/system/libsystem_blocks.dylib
0x945d4000 - 0x947aafef  com.apple.CoreFoundation (6.7 - 635)
<4EE0D62E-5342-3A9F-A740-DA1D5AEBB1B0>
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x94942000 - 0x949a9fff  libc++.1.dylib (19.0.0 - compatibility 1.0.0)
<3AFF3CE8-14AE-300F-8F63-8B7FB9D4DA96> /usr/lib/libc++.1.dylib
0x949fc000 - 0x949fdff0  libunc.dylib (24.0.0 - compatibility 1.0.0)
<BCD277D0-4271-3E96-A4A2-85669DBEE2E2> /usr/lib/system/libunc.dylib
0x94bc9000 - 0x94bcdffa  libcache.dylib (47.0.0 - compatibility 1.0.0)
<98A82BC5-0DD9-3212-9CAE-35A77278EEB6> /usr/lib/system/libcache.dylib
0x94c12000 - 0x94c19fff  libnotify.dylib (80.0.0 - compatibility 1.0.0)
<B3B3875D-311D-31A7-A09F-D1BC56795E00> /usr/lib/system/libnotify.dylib
0x94c1a000 - 0x94c48fe7  libSystem.B.dylib (159.0.0 - compatibility 1.0.0)
<FA9B75F7-B989-3DD3-97FD-373EB95C5BA8> /usr/lib/libSystem.B.dylib
0x94e68000 - 0x94e7effe  libxpc.dylib (77.16.0 - compatibility 1.0.0)
<2EAF3E13-19FA-3EF2-88D6-64ACBC3A6ADB> /usr/lib/system/libxpc.dylib
0x956af000 - 0x956b7ff5  libcopyfile.dylib (85.1.0 - compatibility 1.0.0)
<A1BFC320-616A-30AA-A41E-29D7904FC4C7> /usr/lib/system/libcopyfile.dylib
0x95aa6000 - 0x95ab4fff  libdispatch.dylib (187.5.0 - compatibility 1.0.0)
<1883C8E2-D180-3EA0-8BEF-325F2FEDACD1> /usr/lib/system/libdispatch.dylib
0x95b19000 - 0x95b5cffd  libcommonCrypto.dylib (55010.0.0 - compatibility
1.0.0) <4BA1F5F1-F0A2-3FEB-BB62-F514DCBB3725>
/usr/lib/system/libcommonCrypto.dylib
0x96c46000 - 0x96c49ff7  libmathCommon.A.dylib (2026.0.0 - compatibility
1.0.0) <69357047-7BE0-3360-A36D-000F55E39336>
/usr/lib/system/libmathCommon.A.dylib
0x96c4d000 - 0x96d18fff  libsystem_c.dylib (763.11.0 - compatibility 1.0.0)
<44AA09FD-3A8F-3DCF-AD98-BC9071CA7376> /usr/lib/system/libsystem_c.dylib
0x96ec9000 - 0x96fb9ff1  libiconv.2.dylib (7.0.0 - compatibility 7.0.0)
<9E5F86A3-8405-3774-9E0C-3A074273C96D> /usr/lib/libiconv.2.dylib
0x96fba000 - 0x96fbfff7  libmacho.dylib (800.0.0 - compatibility 1.0.0)
<56A34E97-518E-307E-8218-C5D43A33EE34> /usr/lib/system/libmacho.dylib
0x971e3000 - 0x971e7ff3  libsystem_network.dylib (??? - ???)
<E1455F3E-549B-3D50-A38B-17B394F3C7F6>
/usr/lib/system/libsystem_network.dylib
0x98463000 - 0x98464ff7  libsystem_sandbox.dylib (??? - ???)
<BC0A04E9-4F28-3BC8-AA7B-63C3451E9212>
/usr/lib/system/libsystem_sandbox.dylib
0x9848e000 - 0x984ceff7  libauto.dylib (??? - ???)
<36E7FE7F-27DF-3301-80AA-DD61FBF722F4> /usr/lib/libauto.dylib
0x984d4000 - 0x98536ff3  libstdc++.6.dylib (52.0.0 - compatibility 7.0.0)
<266CE9B3-526A-3C41-BA58-7AE66A3B15FD> /usr/lib/libstdc++.6.dylib
0x9bdc7000 - 0x9be9da5b  libobjc.A.dylib (228.0.0 - compatibility 1.0.0)
<A0EDB351-4B9D-3AA2-9D1A-0C22204FCCD3> /usr/lib/libobjc.A.dylib
0x9bef3000 - 0x9befaff5  libsystem_dnssd.dylib (??? - ???)
<B3217FA8-A7D6-3C90-ABFC-2E54AEF33547> /usr/lib/system/libsystem_dnssd.dylib
0x9bf25000 - 0x9bf26ff7  libquarantine.dylib (36.0.0 - compatibility 1.0.0)
<70782AEC-8933-3EB4-91CA-E44C0E768C90> /usr/lib/system/libquarantine.dylib
0x9bf27000 - 0x9c0dbff3  libicucore.A.dylib (46.1.0 - compatibility 1.0.0)
<6270318A-CA9A-376C-AD6D-64A9B4B4A26E> /usr/lib/libicucore.A.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 1
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 191405
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=52.7M resident=18.7M(36%)
swapped_out_or_unallocated=34.0M(64%)
Writable regions: Total=18.5M written=100K(1%) resident=200K(1%)
swapped_out=0K(0%) unallocated=18.3M(99%)

REGION TYPE                      VIRTUAL
===========                      =======
MALLOC                             10.2M
MALLOC guard page                    32K
Stack                              64.0M
__DATA                              860K
__IMPORT                             12K
__LINKEDIT                         41.7M
__OBJC                               48K
__PAGEZERO                            4K
__PLTSCHEME                           8K
__TEXT                             11.0M
__UNICODE                           544K
mapped file                       199.4M
shared memory                        12K
shared pmap                        10.6M
===========                      =======
TOTAL                             338.4M

Model: MacBookPro4,1, BootROM MBP41.00C1.B03, 2 processors, Intel Core 2
Duo, 2.5 GHz, 4 GB, SMC 1.27f3
Graphics: NVIDIA GeForce 8600M GT, GeForce 8600M GT, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR2 SDRAM, 667 MHz, 0x7F7F7F7F7F9B0000,
0x000000000000000000000000000000000000
Memory Module: BANK 1/DIMM1, 2 GB, DDR2 SDRAM, 667 MHz, 0x7F7F7F7F7F9B0000,
0x000000000000000000000000000000000000
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8C),
Broadcom BCM43xx 1.0 (5.10.131.36.11)
Bluetooth: Version 2.5.0f17, 2 service, 19 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: TOSHIBA MK2555GSXF, 250.06 GB
Parallel ATA Device: MATSHITADVD-R   UJ-867, 582.2 MB
USB Device: Echo, 0x05dc  (Lexar Media, Inc.), 0xa017, 0xfa200000 / 2
USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd400000 / 2
USB Device: BRCM2046 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x1a100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x820f,
0x1a110000 / 3
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0230,
0x5d200000 / 3
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x5d100000 / 2
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