Hi. Dr. Racket stopped working after my upgrade to OS X Lion. Below is the detail report from the most recent failed application startup.<div style="background-color:rgb(255, 255, 191);border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;border-style:initial;border-color:initial;color:rgb(0, 0, 0);margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;font-family:arial, sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;min-height:auto;line-height:normal;text-align:left;width:auto;direction:ltr;background-repeat:initial initial">
</div><div><br></div><div>-----</div><div><br></div><div><div><font face="'courier new', monospace">Process: DrRacket [1492]</font></div><div><font face="'courier new', monospace">Path: /Applications/Racket v5.1.1/DrRacket.app/Contents/MacOS/DrRacket</font></div>
<div><font face="'courier new', monospace">Identifier: org.racket-lang.DrRacket</font></div><div><font face="'courier new', monospace">Version: 5.1.1 (5.1.1)</font></div>
<div><font face="'courier new', monospace">Code Type: X86 (Native)</font></div><div><font face="'courier new', monospace">Parent Process: launchd [267]</font></div>
<div><font face="'courier new', monospace"><br></font></div><div><font face="'courier new', monospace">Date/Time: 2011-07-23 21:57:31.515 -0700</font></div>
<div><font face="'courier new', monospace">OS Version: Mac OS X 10.7 (11A511)</font></div><div><font face="'courier new', monospace">Report Version: 9</font></div>
<div><font face="'courier new', monospace"><br></font></div><div><font face="'courier new', monospace">Interval Since Last Report: 69847 sec</font></div>
<div><font face="'courier new', monospace">Crashes Since Last Report: 5</font></div><div><font face="'courier new', monospace">Per-App Crashes Since Last Report: 4</font></div>
<div><font face="'courier new', monospace">Anonymous UUID: 2BE4AE0A-90CD-43F2-BE56-7BC267209734</font></div><div><font face="'courier new', monospace"><br>
</font></div><div><font face="'courier new', monospace">Crashed Thread: 0 Dispatch queue: com.apple.main-thread</font></div><div><font face="'courier new', monospace"><br>
</font></div><div><font face="'courier new', monospace">Exception Type: EXC_BAD_ACCESS (SIGBUS)</font></div><div><font face="'courier new', monospace">Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000000</font></div>
<div><font face="'courier new', monospace"><br></font></div><div><font face="'courier new', monospace">VM Regions Near 0:</font></div><div><font face="'courier new', monospace">--> __PAGEZERO 0000000000000000-0000000000001000 [ 4K] ---/--- SM=NUL /Applications/Racket v5.1.1/DrRacket.app/Contents/MacOS/DrRacket</font></div>
<div><font face="'courier new', monospace"> __TEXT 0000000000001000-0000000000008000 [ 28K] r-x/rwx SM=COW /Applications/Racket v5.1.1/DrRacket.app/Contents/MacOS/DrRacket</font></div>
<div><font face="'courier new', monospace"><br></font></div><div><font face="'courier new', monospace">Application Specific Information:</font></div><div><font face="'courier new', monospace">objc[1492]: garbage collection is OFF</font></div>
<div><font face="'courier new', monospace"><br></font></div><div><font face="'courier new', monospace">Thread 0 Crashed:: Dispatch queue: com.apple.main-thread</font></div>
<div><font face="'courier new', monospace">0 Racket <span style="white-space:pre-wrap"> </span>0x0000f0ab scheme_main_stack_setup + 43</font></div>
<div><font face="'courier new', monospace">1 org.racket-lang.DrRacket <span style="white-space:pre-wrap"> </span>0x00003616 main + 54</font></div><div><font face="'courier new', monospace">2 org.racket-lang.DrRacket <span style="white-space:pre-wrap"> </span>0x00003312 _start + 216</font></div>
<div><font face="'courier new', monospace">3 org.racket-lang.DrRacket <span style="white-space:pre-wrap"> </span>0x00003239 start + 41</font></div><div><font face="'courier new', monospace"><br>
</font></div><div><font face="'courier new', monospace">Thread 0 crashed with X86 Thread State (32-bit):</font></div><div><font face="'courier new', monospace"> eax: 0x00000102 ebx: 0x0000f089 ecx: 0x00000102 edx: 0x00000000</font></div>
<div><font face="'courier new', monospace"> edi: 0xbffffd40 esi: 0xbffffd7c ebp: 0xbffffca8 esp: 0xbffffc70</font></div><div><font face="'courier new', monospace"> ss: 0x00000023 efl: 0x00010246 eip: 0x0000f0ab cs: 0x0000001b</font></div>
<div><font face="'courier new', monospace"> ds: 0x00000023 es: 0x00000023 fs: 0x00000000 gs: 0x0000000f</font></div><div><font face="'courier new', monospace"> cr2: 0x00000000</font></div>
<div><font face="'courier new', monospace">Logical CPU: 1</font></div><div><font face="'courier new', monospace"><br></font></div><div><font face="'courier new', monospace">Binary Images:</font></div>
<div><font face="'courier new', monospace"> 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</font></div>
<div><font face="'courier new', monospace"> 0xe000 - 0x255fef +Racket (??? - ???) <F6EDAF27-6D64-01B1-FCD2-0FD279D5DD11> /Applications/Racket v5.1.1/*/Racket.framework/Versions/5.1.1_3m/Racket</font></div>
<div><font face="'courier new', monospace">0x8fef2000 - 0x8ff249c7 dyld (195.5 - ???) <134323A7-49DC-3A9D-ACFD-32FAD0FD6BA2> /usr/lib/dyld</font></div><div><font face="'courier new', monospace">0x9006e000 - 0x9006fff5 libremovefile.dylib (21.0.0 - compatibility 1.0.0) <9A1E12B7-F822-3544-8E1D-A6DC81E1F2E6> /usr/lib/system/libremovefile.dylib</font></div>
<div><font face="'courier new', monospace">0x9019a000 - 0x901caff7 libsystem_info.dylib (??? - ???) <C385F5A9-458A-3B49-9CC7-EA81DC5F9141> /usr/lib/system/libsystem_info.dylib</font></div>
<div><font face="'courier new', monospace">0x90344000 - 0x90344fff libdnsinfo.dylib (395.6.0 - compatibility 1.0.0) <959E5139-EB23-3529-8881-2BCB5724D1A9> /usr/lib/system/libdnsinfo.dylib</font></div>
<div><font face="'courier new', monospace">0x91650000 - 0x9166eff7 libsystem_kernel.dylib (1699.22.73 - compatibility 1.0.0) <D32C2E9C-8184-3FAF-8694-99FC619FC71B> /usr/lib/system/libsystem_kernel.dylib</font></div>
<div><font face="'courier new', monospace">0x91781000 - 0x91783ff7 libdyld.dylib (195.5.0 - compatibility 1.0.0) <637660EA-8D12-3B79-B644-041FEADC9C33> /usr/lib/system/libdyld.dylib</font></div>
<div><font face="'courier new', monospace">0x91c44000 - 0x91c4cff3 liblaunch.dylib (392.18.0 - compatibility 1.0.0) <CD470A1E-0147-3CB1-B44D-0B61F9061826> /usr/lib/system/liblaunch.dylib</font></div>
<div><font face="'courier new', monospace">0x923a2000 - 0x923abfff libc++abi.dylib (14.0.0 - compatibility 1.0.0) <FEB5330E-AD5D-37A0-8AB2-0820F311A2C8> /usr/lib/libc++abi.dylib</font></div>
<div><font face="'courier new', monospace">0x926e2000 - 0x926eaff3 libunwind.dylib (30.0.0 - compatibility 1.0.0) <E8DA8CEC-12D6-3C8D-B2E2-5D567C8F3CB5> /usr/lib/system/libunwind.dylib</font></div>
<div><font face="'courier new', monospace">0x92c70000 - 0x92c73ff7 libcompiler_rt.dylib (6.0.0 - compatibility 1.0.0) <7F6C14CC-0169-3F1B-B89C-372F67F1F3B5> /usr/lib/system/libcompiler_rt.dylib</font></div>
<div><font face="'courier new', monospace">0x9312d000 - 0x9312efff libDiagnosticMessagesClient.dylib (??? - ???) <DB3889C2-2FC2-3087-A2A2-4C319455E35C> /usr/lib/libDiagnosticMessagesClient.dylib</font></div>
<div><font face="'courier new', monospace">0x93133000 - 0x93141fff libz.1.dylib (1.2.5 - compatibility 1.0.0) <E73A4025-835C-3F73-9853-B08606E892DB> /usr/lib/libz.1.dylib</font></div>
<div><font face="'courier new', monospace">0x93168000 - 0x93168ffe libkeymgr.dylib (23.0.0 - compatibility 1.0.0) <7F0E8EE2-9E8F-366F-9988-E2F119DB9A82> /usr/lib/system/libkeymgr.dylib</font></div>
<div><font face="'courier new', monospace">0x94164000 - 0x94165fff libsystem_blocks.dylib (53.0.0 - compatibility 1.0.0) <B04592B1-0924-3422-82FF-976B339DF567> /usr/lib/system/libsystem_blocks.dylib</font></div>
<div><font face="'courier new', monospace">0x945d4000 - 0x947aafef com.apple.CoreFoundation (6.7 - 635) <4EE0D62E-5342-3A9F-A740-DA1D5AEBB1B0> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation</font></div>
<div><font face="'courier new', monospace">0x94942000 - 0x949a9fff libc++.1.dylib (19.0.0 - compatibility 1.0.0) <3AFF3CE8-14AE-300F-8F63-8B7FB9D4DA96> /usr/lib/libc++.1.dylib</font></div>
<div><font face="'courier new', monospace">0x949fc000 - 0x949fdff0 libunc.dylib (24.0.0 - compatibility 1.0.0) <BCD277D0-4271-3E96-A4A2-85669DBEE2E2> /usr/lib/system/libunc.dylib</font></div>
<div><font face="'courier new', monospace">0x94bc9000 - 0x94bcdffa libcache.dylib (47.0.0 - compatibility 1.0.0) <98A82BC5-0DD9-3212-9CAE-35A77278EEB6> /usr/lib/system/libcache.dylib</font></div>
<div><font face="'courier new', monospace">0x94c12000 - 0x94c19fff libnotify.dylib (80.0.0 - compatibility 1.0.0) <B3B3875D-311D-31A7-A09F-D1BC56795E00> /usr/lib/system/libnotify.dylib</font></div>
<div><font face="'courier new', monospace">0x94c1a000 - 0x94c48fe7 libSystem.B.dylib (159.0.0 - compatibility 1.0.0) <FA9B75F7-B989-3DD3-97FD-373EB95C5BA8> /usr/lib/libSystem.B.dylib</font></div>
<div><font face="'courier new', monospace">0x94e68000 - 0x94e7effe libxpc.dylib (77.16.0 - compatibility 1.0.0) <2EAF3E13-19FA-3EF2-88D6-64ACBC3A6ADB> /usr/lib/system/libxpc.dylib</font></div>
<div><font face="'courier new', monospace">0x956af000 - 0x956b7ff5 libcopyfile.dylib (85.1.0 - compatibility 1.0.0) <A1BFC320-616A-30AA-A41E-29D7904FC4C7> /usr/lib/system/libcopyfile.dylib</font></div>
<div><font face="'courier new', monospace">0x95aa6000 - 0x95ab4fff libdispatch.dylib (187.5.0 - compatibility 1.0.0) <1883C8E2-D180-3EA0-8BEF-325F2FEDACD1> /usr/lib/system/libdispatch.dylib</font></div>
<div><font face="'courier new', monospace">0x95b19000 - 0x95b5cffd libcommonCrypto.dylib (55010.0.0 - compatibility 1.0.0) <4BA1F5F1-F0A2-3FEB-BB62-F514DCBB3725> /usr/lib/system/libcommonCrypto.dylib</font></div>
<div><font face="'courier new', monospace">0x96c46000 - 0x96c49ff7 libmathCommon.A.dylib (2026.0.0 - compatibility 1.0.0) <69357047-7BE0-3360-A36D-000F55E39336> /usr/lib/system/libmathCommon.A.dylib</font></div>
<div><font face="'courier new', monospace">0x96c4d000 - 0x96d18fff libsystem_c.dylib (763.11.0 - compatibility 1.0.0) <44AA09FD-3A8F-3DCF-AD98-BC9071CA7376> /usr/lib/system/libsystem_c.dylib</font></div>
<div><font face="'courier new', monospace">0x96ec9000 - 0x96fb9ff1 libiconv.2.dylib (7.0.0 - compatibility 7.0.0) <9E5F86A3-8405-3774-9E0C-3A074273C96D> /usr/lib/libiconv.2.dylib</font></div>
<div><font face="'courier new', monospace">0x96fba000 - 0x96fbfff7 libmacho.dylib (800.0.0 - compatibility 1.0.0) <56A34E97-518E-307E-8218-C5D43A33EE34> /usr/lib/system/libmacho.dylib</font></div>
<div><font face="'courier new', monospace">0x971e3000 - 0x971e7ff3 libsystem_network.dylib (??? - ???) <E1455F3E-549B-3D50-A38B-17B394F3C7F6> /usr/lib/system/libsystem_network.dylib</font></div>
<div><font face="'courier new', monospace">0x98463000 - 0x98464ff7 libsystem_sandbox.dylib (??? - ???) <BC0A04E9-4F28-3BC8-AA7B-63C3451E9212> /usr/lib/system/libsystem_sandbox.dylib</font></div>
<div><font face="'courier new', monospace">0x9848e000 - 0x984ceff7 libauto.dylib (??? - ???) <36E7FE7F-27DF-3301-80AA-DD61FBF722F4> /usr/lib/libauto.dylib</font></div><div><font face="'courier new', monospace">0x984d4000 - 0x98536ff3 libstdc++.6.dylib (52.0.0 - compatibility 7.0.0) <266CE9B3-526A-3C41-BA58-7AE66A3B15FD> /usr/lib/libstdc++.6.dylib</font></div>
<div><font face="'courier new', monospace">0x9bdc7000 - 0x9be9da5b libobjc.A.dylib (228.0.0 - compatibility 1.0.0) <A0EDB351-4B9D-3AA2-9D1A-0C22204FCCD3> /usr/lib/libobjc.A.dylib</font></div>
<div><font face="'courier new', monospace">0x9bef3000 - 0x9befaff5 libsystem_dnssd.dylib (??? - ???) <B3217FA8-A7D6-3C90-ABFC-2E54AEF33547> /usr/lib/system/libsystem_dnssd.dylib</font></div>
<div><font face="'courier new', monospace">0x9bf25000 - 0x9bf26ff7 libquarantine.dylib (36.0.0 - compatibility 1.0.0) <70782AEC-8933-3EB4-91CA-E44C0E768C90> /usr/lib/system/libquarantine.dylib</font></div>
<div><font face="'courier new', monospace">0x9bf27000 - 0x9c0dbff3 libicucore.A.dylib (46.1.0 - compatibility 1.0.0) <6270318A-CA9A-376C-AD6D-64A9B4B4A26E> /usr/lib/libicucore.A.dylib</font></div>
<div><font face="'courier new', monospace"><br></font></div><div><font face="'courier new', monospace">External Modification Summary:</font></div><div><font face="'courier new', monospace"> Calls made by other processes targeting this process:</font></div>
<div><font face="'courier new', monospace"> task_for_pid: 1</font></div><div><font face="'courier new', monospace"> thread_create: 0</font></div><div>
<font face="'courier new', monospace"> thread_set_state: 0</font></div><div><font face="'courier new', monospace"> Calls made by this process:</font></div>
<div><font face="'courier new', monospace"> task_for_pid: 0</font></div><div><font face="'courier new', monospace"> thread_create: 0</font></div><div>
<font face="'courier new', monospace"> thread_set_state: 0</font></div><div><font face="'courier new', monospace"> Calls made by all processes on this machine:</font></div>
<div><font face="'courier new', monospace"> task_for_pid: 191405</font></div><div><font face="'courier new', monospace"> thread_create: 0</font></div>
<div><font face="'courier new', monospace"> thread_set_state: 0</font></div><div><font face="'courier new', monospace"><br></font></div><div><font face="'courier new', monospace">VM Region Summary:</font></div>
<div><font face="'courier new', monospace">ReadOnly portion of Libraries: Total=52.7M resident=18.7M(36%) swapped_out_or_unallocated=34.0M(64%)</font></div><div><font face="'courier new', monospace">Writable regions: Total=18.5M written=100K(1%) resident=200K(1%) swapped_out=0K(0%) unallocated=18.3M(99%)</font></div>
<div><font face="'courier new', monospace"> </font></div><div><font face="'courier new', monospace">REGION TYPE VIRTUAL</font></div><div>
<font face="'courier new', monospace">=========== =======</font></div><div><font face="'courier new', monospace">MALLOC 10.2M</font></div>
<div><font face="'courier new', monospace">MALLOC guard page 32K</font></div><div><font face="'courier new', monospace">Stack 64.0M</font></div>
<div><font face="'courier new', monospace">__DATA 860K</font></div><div><font face="'courier new', monospace">__IMPORT 12K</font></div>
<div><font face="'courier new', monospace">__LINKEDIT 41.7M</font></div><div><font face="'courier new', monospace">__OBJC 48K</font></div>
<div><font face="'courier new', monospace">__PAGEZERO 4K</font></div><div><font face="'courier new', monospace">__PLTSCHEME 8K</font></div>
<div><font face="'courier new', monospace">__TEXT 11.0M</font></div><div><font face="'courier new', monospace">__UNICODE 544K</font></div>
<div><font face="'courier new', monospace">mapped file 199.4M</font></div><div><font face="'courier new', monospace">shared memory 12K</font></div>
<div><font face="'courier new', monospace">shared pmap 10.6M</font></div><div><font face="'courier new', monospace">=========== =======</font></div>
<div><font face="'courier new', monospace">TOTAL 338.4M</font></div><div><font face="'courier new', monospace"><br></font></div>
<div><font face="'courier new', monospace">Model: MacBookPro4,1, BootROM MBP41.00C1.B03, 2 processors, Intel Core 2 Duo, 2.5 GHz, 4 GB, SMC 1.27f3</font></div><div><font face="'courier new', monospace">Graphics: NVIDIA GeForce 8600M GT, GeForce 8600M GT, PCIe, 512 MB</font></div>
<div><font face="'courier new', monospace">Memory Module: BANK 0/DIMM0, 2 GB, DDR2 SDRAM, 667 MHz, 0x7F7F7F7F7F9B0000, 0x000000000000000000000000000000000000</font></div><div><font face="'courier new', monospace">Memory Module: BANK 1/DIMM1, 2 GB, DDR2 SDRAM, 667 MHz, 0x7F7F7F7F7F9B0000, 0x000000000000000000000000000000000000</font></div>
<div><font face="'courier new', monospace">AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8C), Broadcom BCM43xx 1.0 (5.10.131.36.11)</font></div><div><font face="'courier new', monospace">Bluetooth: Version 2.5.0f17, 2 service, 19 devices, 1 incoming serial ports</font></div>
<div><font face="'courier new', monospace">Network Service: AirPort, AirPort, en1</font></div><div><font face="'courier new', monospace">Serial ATA Device: TOSHIBA MK2555GSXF, 250.06 GB</font></div>
<div><font face="'courier new', monospace">Parallel ATA Device: MATSHITADVD-R UJ-867, 582.2 MB</font></div><div><font face="'courier new', monospace">USB Device: Echo, 0x05dc (Lexar Media, Inc.), 0xa017, 0xfa200000 / 2</font></div>
<div><font face="'courier new', monospace">USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd400000 / 2</font></div><div><font face="'courier new', monospace">USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x1a100000 / 2</font></div>
<div><font face="'courier new', monospace">USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x820f, 0x1a110000 / 3</font></div><div><font face="'courier new', monospace">USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0230, 0x5d200000 / 3</font></div>
<div><font face="'courier new', monospace">USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x5d100000 / 2</font></div></div><div><br></div>
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