Which of our tools is giving you problems? GPGMail, specifically dirmngr is crashing when reading mail

Describe your problem. Add as much detail as possible. dirmngr keeps crashing when reading a signed message. It seems to happen only when the message is not yet marked as having been read. This just started today. I was reading the Linux netdev mailing list. Here is the crash report:

Process: dirmngr [37444]
Path: /usr/local/MacGPG2/bin/dirmngr
Identifier: dirmngr
Version: 0
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: dirmngr [37444]
User ID: 502

Date/Time: 2017-12-18 13:32:43.710 -0800
OS Version: Mac OS X 10.12.6 (16G1114)
Report Version: 12
Anonymous UUID: 388971C9-5802-68F2-6169-381C17A3A627

Sleep/Wake UUID: 9F43B5C1-EF7A-4EB5-8ECC-2E52EB8BF462

Time Awake Since Boot: 160000 seconds
Time Since Wake: 16000 seconds

System Integrity Protection: enabled

Crashed Thread: 1

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000110
Exception Note: EXC_CORPSE_NOTIFY

Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [0]

VM Regions Near 0x110:
--> __TEXT 000000010d081000-000000010d0f8000 [ 476K] r-x/rwx SM=COW /usr/local/MacGPG2/bin/dirmngr

Application Specific Information:
*** multi-threaded process forked *** crashed on child side of fork pre-exec

Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fffe1db1b7a __pselect + 10
1 libsystem_kernel.dylib 0x00007fffe1dae77c pselect$1050 + 82
2 libnpth.0.dylib 0x000000010d2537dc npth_pselect + 76
3 dirmngr 0x000000010d08601b handle_connections + 1019
4 dirmngr 0x000000010d0843d3 main + 5795
5 libdyld.dylib 0x00007fffe1c83235 start + 1

Thread 1 Crashed:
0 libdispatch.dylib 0x00007fffe1c62749 dispatch_queue_push + 171
1 com.apple.security 0x00007fffd295f9de Security::KeychainCore::StorageManager::tickleKeychain(Security::KeychainCore::KeychainImpl*) + 504
2 com.apple.security 0x00007fffd2911dd8 Security::KeychainCore::KCCursorImpl::newKeychain(std::1::wrap_iterSecurity::KeychainCore::Keychain*) + 44
3 com.apple.security 0x00007fffd27a29ee Security::KeychainCore::KCCursorImpl::next(Security::KeychainCore::Item&) + 212
4 com.apple.security 0x00007fffd29707de Security::KeychainCore::TrustSettings::findQualifiedCerts(std::1::vector<Security::KeychainCore::Keychain, std::1::allocatorSecurity::KeychainCore::Keychain >&, bool, bool, cssm_data const*, char const*, unsigned int, __CFArray*) + 206
5 com.apple.security 0x00007fffd297070a Security::KeychainCore::TrustSettings::findCerts(std::1::vector<Security::KeychainCore::Keychain, std::_1::allocatorSecurity::KeychainCore::Keychain >&, __CFArray*) + 38
6 com.apple.security 0x00007fffd295bb25 SecTrustSettingsCopyCertificates + 360
7 libgnutls.30.dylib 0x000000010d282ba2 gnutls_x509_trust_list_add_system_trust + 66
8 dirmngr 0x000000010d09f8c8 http_session_new + 584
9 dirmngr 0x000000010d0a6837 send_request + 151
10 dirmngr 0x000000010d0a7200 ks_hkp_get + 640
11 dirmngr 0x000000010d0a4b05 ks_action_get + 325
12 dirmngr 0x000000010d08a6b8 cmd_ks_get + 536
13 libassuan.0.dylib 0x000000010d11b966 dispatch_command + 630
14 libassuan.0.dylib 0x000000010d11b35a assuan_process + 154
15 dirmngr 0x000000010d0870bd start_command_handler + 733
16 dirmngr 0x000000010d086686 start_connection_thread + 166
17 libnpth.0.dylib 0x000000010d252fd4 thread_start + 68
18 libsystem_pthread.dylib 0x00007fffe1e9c93b _pthread_body + 180
19 libsystem_pthread.dylib 0x00007fffe1e9c887 _pthread_start + 286
20 libsystem_pthread.dylib 0x00007fffe1e9c08d thread_start + 13

Thread 1 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000100 rbx: 0x0000000000000005 rcx: 0x0000000000000800 rdx: 0x0000000000000800 rdi: 0x00007fffeab701c0 rsi: 0x00007fdb7cd56c80 rbp: 0x000070000c289540 rsp: 0x000070000c289428 r8: 0x00000000a40008ff r9: 0x00000000ffffffff r10: 0x0000000100000000 r11: 0x0000000c00000000 r12: 0x000070000c2894b0 r13: 0x00007fdb7cd56490 r14: 0x000070000c289470 r15: 0x021c69ce9cfb0077 rip: 0x00007fffe1c62749 rfl: 0x0000000000010206 cr2: 0x0000000000000110

Logical CPU: 2
Error Code: 0x00000006
Trap Number: 14

Binary Images:
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0x10d4bafdf +libgmp.10.dylib (0) <571DDA82-C879-3ABF-B595-5BD5C6935463> /usr/local/MacGPG2/lib/libgmp.10.dylib 0x11279e000 - 0x1127dbdc7 dyld (433.5) <322C06B7-8878-311D-888C-C8FD2CA96FF3> /usr/lib/dyld 0x7fffc8fd0000 - 0x7fffc8fd0fff com.apple.Accelerate (1.11 - Accelerate 1.11) <916E360F-323C-3AE1-AB3D-D1F3B284AEE9> /System/Library/Frameworks/Accelerate.framework/Versions/A/Accelerate 0x7fffc8fe9000 - 0x7fffc9502feb com.apple.vImage (8.1 - ???) /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vImage.framework/Versions/A/vImage 0x7fffc9503000 - 0x7fffc9674ff3 libBLAS.dylib (1185.50.4) <4087FFE0-627E-3623-96B4-F0A9A1991E09> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib 0x7fffc9675000 - 0x7fffc9689ffb libBNNS.dylib (15) <254698C7-7D36-3FFF-864E-ADEEEE543076> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBNNS.dylib 0x7fffc968a000 - 0x7fffc9a80fef libLAPACK.dylib (1185.50.4) /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libLAPACK.dylib 0x7fffc9a81000 - 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2.0) <44E4467E-90BB-3CC4-9E57-9B09D7E90081> /System/Library/PrivateFrameworks/CommonAuth.framework/Versions/A/CommonAuth 0x7fffd7a09000 - 0x7fffd7a11ffb com.apple.frameworks.CoreDaemon (1.3 - 1.3) <2AB86FAF-37B3-3323-9EF0-CA591B6E357C> /System/Library/PrivateFrameworks/CoreDaemon.framework/Versions/B/CoreDaemon 0x7fffd7b22000 - 0x7fffd7b32fff com.apple.CoreEmoji (1.0 - 40.3.3) /System/Library/PrivateFrameworks/CoreEmoji.framework/Versions/A/CoreEmoji 0x7fffdabb9000 - 0x7fffdac2fff3 com.apple.Heimdal (4.0 - 2.0) <9541C717-96FF-32D3-8F0B-5048525DAA70> /System/Library/PrivateFrameworks/Heimdal.framework/Versions/A/Heimdal 0x7fffdb371000 - 0x7fffdb528fff com.apple.LanguageModeling (1.0 - 123.2.5) /System/Library/PrivateFrameworks/LanguageModeling.framework/Versions/A/LanguageModeling 0x7fffdc046000 - 0x7fffdc06eff7 com.apple.MultitouchSupport.framework (368.16 - 368.16) /System/Library/PrivateFrameworks/MultitouchSupport.framework/Versions/A/MultitouchSupport 0x7fffdc120000 - 0x7fffdc12bfff com.apple.NetAuth (6.2 - 6.2) <97F487D6-8089-31A8-B68C-6C1EAC6ED1B5> /System/Library/PrivateFrameworks/NetAuth.framework/Versions/A/NetAuth 0x7fffdef7c000 - 0x7fffdef82ff7 com.apple.TCC (1.0 - 1) <911B534B-4AC7-34E4-935E-E42ECD008CBC> /System/Library/PrivateFrameworks/TCC.framework/Versions/A/TCC 0x7fffe038b000 - 0x7fffe038dffb com.apple.loginsupport (1.0 - 1) /System/Library/PrivateFrameworks/login.framework/Versions/A/Frameworks/loginsupport.framework/Versions/A/loginsupport 0x7fffe03e2000 - 0x7fffe03fdff7 libCRFSuite.dylib (34) /usr/lib/libCRFSuite.dylib 0x7fffe03fe000 - 0x7fffe0409fff libChineseTokenizer.dylib (21) <0886E908-A825-36AF-B94B-2361FD8BC2A1> /usr/lib/libChineseTokenizer.dylib 0x7fffe049b000 - 0x7fffe049cff3 libDiagnosticMessagesClient.dylib (102) <84A04D24-0E60-3810-A8C0-90A65E2DF61A> /usr/lib/libDiagnosticMessagesClient.dylib 0x7fffe06d4000 - 0x7fffe06d4fff libOpenScriptingUtil.dylib (172.1) <0F1BA407-97D1-36F6-882D-A355EAAD5E00> /usr/lib/libOpenScriptingUtil.dylib 0x7fffe06da000 - 0x7fffe06dbffb libSystem.B.dylib (1238.60.2) <03D8D904-05E2-3A15-B14E-3472703550DC> /usr/lib/libSystem.B.dylib 0x7fffe0747000 - 0x7fffe0772ff3 libarchive.2.dylib (41.70.2) <907D1FB1-9A65-33F5-AFC8-0B6E5AE9D83A> /usr/lib/libarchive.2.dylib 0x7fffe07f3000 - 0x7fffe07f3ff3 libauto.dylib (187) <34388D0B-C539-3C1B-9408-2BC152162E43> /usr/lib/libauto.dylib 0x7fffe07f4000 - 0x7fffe0804ff3 libbsm.0.dylib (34) <20084796-B04D-3B35-A003-EA11459557A9> /usr/lib/libbsm.0.dylib 0x7fffe0805000 - 0x7fffe0813ff7 libbz2.1.0.dylib (38) /usr/lib/libbz2.1.0.dylib 0x7fffe0814000 - 0x7fffe086aff7 libc++.1.dylib (307.5) <0B43BB5D-E6EB-3464-8DE9-B41AC8ED9D1C> /usr/lib/libc++.1.dylib 0x7fffe086b000 - 0x7fffe0894ff7 libc++abi.dylib (307.4) /usr/lib/libc++abi.dylib 0x7fffe0895000 - 0x7fffe08a5ffb libcmph.dylib (6) <2B5D405E-2D0B-3320-ABD6-622934C86ABE> /usr/lib/libcmph.dylib 0x7fffe08a6000 - 0x7fffe08bcfcf libcompression.dylib (39) /usr/lib/libcompression.dylib 0x7fffe08bd000 - 0x7fffe08bdff7 libcoretls.dylib (121.50.4) <64B1001E-10F6-3542-A3B2-C4B49F51817F> /usr/lib/libcoretls.dylib 0x7fffe08be000 - 0x7fffe08bfff3 libcoretls_cfhelpers.dylib (121.50.4) <1A10303E-5EB0-3C7C-9165-021FCDFD934D> /usr/lib/libcoretls_cfhelpers.dylib 0x7fffe0bfb000 - 0x7fffe0c4eff7 libcups.2.dylib (450) <9950BFCB-7882-33C9-9ECF-CE66773C5657> /usr/lib/libcups.2.dylib 0x7fffe0ccb000 - 0x7fffe0ccbfff libenergytrace.dylib (15) /usr/lib/libenergytrace.dylib 0x7fffe0cdb000 - 0x7fffe0ce0ff7 libheimdal-asn1.dylib (498.50.9) <92C953A2-5E1D-39E9-875E-92F29A12D6FB> /usr/lib/libheimdal-asn1.dylib 0x7fffe0ce1000 - 0x7fffe0dd3ff7 libiconv.2.dylib (50) <42125B35-81D7-3FC4-9475-A26DBE10884D> /usr/lib/libiconv.2.dylib 0x7fffe0dd4000 - 0x7fffe0ff9ffb libicucore.A.dylib (57167.0.1) /usr/lib/libicucore.A.dylib 0x7fffe0fff000 - 0x7fffe1000fff liblangid.dylib (126) <2085E7A7-9A34-3735-87F4-F174EF8EABF0> /usr/lib/liblangid.dylib 0x7fffe1001000 - 0x7fffe101affb liblzma.5.dylib (10) <44BD0279-99DD-36B5-8A6E-C11432E2098D> /usr/lib/liblzma.5.dylib 0x7fffe101b000 - 0x7fffe1031ff7 libmarisa.dylib (5) <9030D214-5D0F-30CB-AC03-902C63909362> /usr/lib/libmarisa.dylib 0x7fffe1032000 - 0x7fffe12daff7 libmecabra.dylib (744.8) /usr/lib/libmecabra.dylib 0x7fffe130d000 - 0x7fffe1387ff3 libnetwork.dylib (856.60.1) <191E99F5-4723-3180-8013-02AF2F9AE4B8> /usr/lib/libnetwork.dylib 0x7fffe1388000 - 0x7fffe175a047 libobjc.A.dylib (709.1) <70614861-0340-32E2-85ED-FE65759CDFFA> /usr/lib/libobjc.A.dylib 0x7fffe175d000 - 0x7fffe1761fff libpam.2.dylib (21.30.1) <71EB0D88-DE84-3C8D-A2C5-58AA282BC5BC> /usr/lib/libpam.2.dylib 0x7fffe1762000 - 0x7fffe1793fff libpcap.A.dylib (67.60.2) /usr/lib/libpcap.A.dylib 0x7fffe17b0000 - 0x7fffe17ccffb libresolv.9.dylib (64) /usr/lib/libresolv.9.dylib 0x7fffe1807000 - 0x7fffe1819ffb libsasl2.2.dylib (209) <32107C59-22C6-3049-B86E-9C2F85FF549B> /usr/lib/libsasl2.2.dylib 0x7fffe181c000 - 0x7fffe196aff7 libsqlite3.dylib (254.8) <1ECF7DF7-7A07-3B4B-A63B-F4EFF6BC7ACF> /usr/lib/libsqlite3.dylib 0x7fffe1a5f000 - 0x7fffe1a6cfff libxar.1.dylib (357) <69547C64-E811-326F-BBED-490C6361BDCB> /usr/lib/libxar.1.dylib 0x7fffe1a6d000 - 0x7fffe1b5cff3 libxml2.2.dylib (30.18) <75135C3D-47B1-3217-AC2B-B566E2E1A4A3> /usr/lib/libxml2.2.dylib 0x7fffe1b5d000 - 0x7fffe1b86fff libxslt.1.dylib (15.9.1) /usr/lib/libxslt.1.dylib 0x7fffe1b87000 - 0x7fffe1b98ff3 libz.1.dylib (67) <46E3FFA2-4328-327A-8D34-A03E20BFFB8E> /usr/lib/libz.1.dylib 0x7fffe1ba7000 - 0x7fffe1babff7 libcache.dylib (79) <093A4DAB-8385-3D47-A350-E20CB7CCF7BF> /usr/lib/system/libcache.dylib 0x7fffe1bac000 - 0x7fffe1bb6fff libcommonCrypto.dylib (60092.50.5) <8A64D1B0-C70E-385C-92F0-E669079FDA90> /usr/lib/system/libcommonCrypto.dylib 0x7fffe1bb7000 - 0x7fffe1bbefff libcompiler_rt.dylib (62) <55D47421-772A-32AB-B529-1A46C2F43B4D> /usr/lib/system/libcompiler_rt.dylib 0x7fffe1bbf000 - 0x7fffe1bc7fff libcopyfile.dylib (138) <819BEA3C-DF11-3E3D-A1A1-5A51C5BF1961> /usr/lib/system/libcopyfile.dylib 0x7fffe1bc8000 - 0x7fffe1c4bfdf libcorecrypto.dylib (442.50.19) <65D7165E-2E71-335D-A2D6-33F78E2DF0C1> /usr/lib/system/libcorecrypto.dylib 0x7fffe1c4c000 - 0x7fffe1c7dfff libdispatch.dylib (703.50.37) <6582BAD6-ED27-3B30-B620-90B1C5A4AE3C> /usr/lib/system/libdispatch.dylib 0x7fffe1c7e000 - 0x7fffe1c83ffb libdyld.dylib (433.5) <990CF9D7-4AD1-310D-A4B4-010F6D84FFD8> /usr/lib/system/libdyld.dylib 0x7fffe1c84000 - 0x7fffe1c84ffb libkeymgr.dylib (28) <7AA011A9-DC21-3488-BF73-3B5B14D1FDD6> /usr/lib/system/libkeymgr.dylib 0x7fffe1c85000 - 0x7fffe1c91fff libkxld.dylib (3789.72.11) /usr/lib/system/libkxld.dylib 0x7fffe1c92000 - 0x7fffe1c92fff liblaunch.dylib (972.70.1) /usr/lib/system/liblaunch.dylib 0x7fffe1c93000 - 0x7fffe1c98ff3 libmacho.dylib (898) <17D5D855-F6C3-3B04-B680-E9BF02EF8AED> /usr/lib/system/libmacho.dylib 0x7fffe1c99000 - 0x7fffe1c9bff3 libquarantine.dylib (85.50.1) <12448CC2-378E-35F3-BE33-9DC395A5B970> /usr/lib/system/libquarantine.dylib 0x7fffe1c9c000 - 0x7fffe1c9dffb libremovefile.dylib (45) <38D4CB9C-10CD-30D3-8B7B-A515EC75FE85> /usr/lib/system/libremovefile.dylib 0x7fffe1c9e000 - 0x7fffe1cb6ff7 libsystem_asl.dylib (349.50.5) <096E4228-3B7C-30A6-8B13-EC909A64499A> /usr/lib/system/libsystem_asl.dylib 0x7fffe1cb7000 - 0x7fffe1cb7ff7 libsystem_blocks.dylib (67) <10DC5404-73AB-35B3-A277-A8AFECB476EB> /usr/lib/system/libsystem_blocks.dylib 0x7fffe1cb8000 - 0x7fffe1d45fef libsystem_c.dylib (1158.50.2) /usr/lib/system/libsystem_c.dylib 0x7fffe1d46000 - 0x7fffe1d49ffb libsystem_configuration.dylib (888.60.2) /usr/lib/system/libsystem_configuration.dylib 0x7fffe1d4a000 - 0x7fffe1d4dfff libsystem_coreservices.dylib (41.4) <7D26DE79-B424-3450-85E1-F7FAB32714AB> /usr/lib/system/libsystem_coreservices.dylib 0x7fffe1d4e000 - 0x7fffe1d66fff libsystem_coretls.dylib (121.50.4) /usr/lib/system/libsystem_coretls.dylib 0x7fffe1d67000 - 0x7fffe1d6dfff libsystem_dnssd.dylib (765.50.9) /usr/lib/system/libsystem_dnssd.dylib 0x7fffe1d6e000 - 0x7fffe1d97ff7 libsystem_info.dylib (503.50.4) <611DB84C-BF70-3F92-8702-B9F28A900920> /usr/lib/system/libsystem_info.dylib 0x7fffe1d98000 - 0x7fffe1dbaff7 libsystem_kernel.dylib (3789.72.11) /usr/lib/system/libsystem_kernel.dylib 0x7fffe1dbb000 - 0x7fffe1e02fe7 libsystem_m.dylib (3121.6) <86D499B5-BBDC-3D3B-8A4E-97AE8E6672A4> /usr/lib/system/libsystem_m.dylib 0x7fffe1e03000 - 0x7fffe1e21ff7 libsystem_malloc.dylib (116.50.8) /usr/lib/system/libsystem_malloc.dylib 0x7fffe1e22000 - 0x7fffe1e7bffb libsystem_network.dylib (856.60.1) <369D0221-56CA-3C3E-9EDE-94B41CAE77B7> /usr/lib/system/libsystem_network.dylib 0x7fffe1e7c000 - 0x7fffe1e85ff3 libsystem_networkextension.dylib (563.60.2) /usr/lib/system/libsystem_networkextension.dylib 0x7fffe1e86000 - 0x7fffe1e8fff3 libsystem_notify.dylib (165.20.1) /usr/lib/system/libsystem_notify.dylib 0x7fffe1e90000 - 0x7fffe1e98fe7 libsystem_platform.dylib (126.50.8) <897462FD-B318-321B-A554-E61982630F7E> /usr/lib/system/libsystem_platform.dylib 0x7fffe1e99000 - 0x7fffe1ea3ff7 libsystem_pthread.dylib (218.60.3) /usr/lib/system/libsystem_pthread.dylib 0x7fffe1ea4000 - 0x7fffe1ea7ff7 libsystem_sandbox.dylib (592.70.2) <19320A42-2E3B-361B-BBDA-2F5F2E87B100> /usr/lib/system/libsystem_sandbox.dylib 0x7fffe1ea8000 - 0x7fffe1ea9ff3 libsystem_secinit.dylib (24.50.4) /usr/lib/system/libsystem_secinit.dylib 0x7fffe1eaa000 - 0x7fffe1eb1ffb libsystem_symptoms.dylib (532.50.47) <3390E07C-C1CE-348F-ADBD-2C5440B45EAA> /usr/lib/system/libsystem_symptoms.dylib 0x7fffe1eb2000 - 0x7fffe1ec5ff7 libsystem_trace.dylib (518.70.1) /usr/lib/system/libsystem_trace.dylib 0x7fffe1ec6000 - 0x7fffe1ecbffb libunwind.dylib (35.3) <3D50D8A8-C460-334D-A519-2DA841102C6B> /usr/lib/system/libunwind.dylib 0x7fffe1ecc000 - 0x7fffe1ef5ff7 libxpc.dylib (972.70.1) /usr/lib/system/libxpc.dylib

External Modification Summary:
Calls made by other processes targeting this process: task_for_pid: 0 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: 160399 thread_create: 0 thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=196.5M resident=0K(0%) swapped_out_or_unallocated=196.5M(100%)
Writable regions: Total=57.2M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=57.2M(100%)

                            VIRTUAL   REGION

REGION TYPE SIZE COUNT (non-coalesced)
=========== ======= ======= Activity Tracing 256K 2
Dispatch continuations 8192K 2
Kernel Alloc Once 8K 2
MALLOC 38.7M 13
MALLOC guard page 16K 4
STACK GUARD 56.0M 3
Stack 10.0M 6
Stack Guard 12K 4
__DATA 9512K 153
__LINKEDIT 114.7M 14
__TEXT 81.8M 153
__UNICODE 556K 2
mapped file 32K 2
shared memory 48K 7
=========== ======= ======= TOTAL 319.4M 353

Model: MacBookPro11,1, BootROM MBP111.0142.B00, 2 processors, Intel Core i5, 2.4 GHz, 8 GB, SMC 2.16f68
Graphics: Intel Iris, Intel Iris, Built-In
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x802C, 0x384B54463531323634485A2D314736453120
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x802C, 0x384B54463531323634485A2D314736453120
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x112), Broadcom BCM43xx 1.0 (7.21.171.133.1a2)
Bluetooth: Version 5.0.5f1, 3 services, 17 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en0
Serial ATA Device: APPLE SSD SM0256F, 251 GB
USB Device: USB 3.0 Bus
USB Device: Apple Internal Keyboard / Trackpad
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
Thunderbolt Bus: MacBook Pro, Apple Inc., 17.2

What did you expect instead Well, I don't expect recurring crashes.

Describe steps leading to the problem. Reading as yet unread signed email

Are you using any other Mail.app plugins? Yes, MailFlow.