VTT Crashes if AI produces no result

[VoxelPrismatic]

What happened?

Cannot reproduce on video (only worked in the one comment)

1. Go to GitHub
2. Open comment card
3. Say some words
4. Move cursor to middle of sentence
5. Start saying something again

Keyboard Version

v0.1.24.2-96-g1c299fff3-Unstable

Text field info

Comment card in GitHub app

[VoxelPrismatic]

Crash log 1

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'Sony/XQ-DQ62/XQ-DQ62:15/67.2.A.3.42/067002A003004200521143226:user/release-keys'
Revision: '0'
ABI: 'arm64'
Timestamp: 2025-06-06 16:39:20.555987443-0500
Process uptime: 8s
Cmdline: org.futo.inputmethod.latin.unstable
pid: 31788, tid: 31903, name: whisper-ggml-in  >>> org.futo.inputmethod.latin.unstable <<<
uid: 10537
tagged_addr_ctrl: 0000000000000001 (PR_TAGGED_ADDR_ENABLE)
pac_enabled_keys: 000000000000000f (PR_PAC_APIAKEY, PR_PAC_APIBKEY, PR_PAC_APDAKEY, PR_PAC_APDBKEY)
signal 6 (SIGABRT), code -1 (SI_QUEUE), fault addr --------
Abort message: 'No pending exception expected: java.util.NoSuchElementException: Char sequence is empty.
  at char kotlin.text.StringsKt___StringsKt.last(java.lang.CharSequence) (SourceFile:25)
  at java.lang.String org.futo.inputmethod.latin.uix.utils.ModelOutputSanitizer.sanitize(java.lang.String, org.futo.inputmethod.latin.uix.utils.TextContext) (SourceFile:121)
  at void org.futo.voiceinput.shared.AudioRecognizer$runnerCallback$1.partialResult(java.lang.String) (SourceFile:37)
  at java.lang.Object org.futo.voiceinput.shared.whisper.MultiModelRunner$run$2$$ExternalSyntheticLambda0.invoke(java.lang.Object) (SourceFile:18)
  at void org.futo.voiceinput.shared.ggml.WhisperGGML.invokePartialResult(java.lang.String) (SourceFile:11)
  at java.lang.String org.futo.voiceinput.shared.ggml.WhisperGGML.inferNative(long, float[], java.lang.String, java.lang.String[], java.lang.String[], int, boolean) (SourceFile:-2)
  at java.lang.String org.futo.voiceinput.shared.ggml.WhisperGGML.access$inferNative(org.futo.voiceinput.shared.ggml.WhisperGGML, long, float[], java.lang.String, java.lang.String[], java.lang.String[], int, boolean) (SourceFile:1)
  at java.lang.Object org.futo.voiceinput.shared.ggml.WhisperGGML$infer$2.invokeSuspend(java.lang.Object) (SourceFile:43)
  at void kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(java.lang.Object) (SourceFile:9)
  at void kotlinx.coroutines.DispatchedTask.run() (SourceFile:115)
  at java.lang.Object java.util.concurrent.Executors$RunnableAdapter.call() (Executors.java:487)
  at void java.util.concurrent.FutureTask.run() (FutureTask.java:264)
  at void java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run() (ScheduledThreadPoolExecutor.java:307)
  at void java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) (ThreadPoolExecutor.java:1145)
  at void java.util.concurrent.ThreadPoolExecutor$Worker.run() (ThreadPoolExecutor.java:644)
  at void java.lang.Thread.run() (Thread.java:1012)'
    x0  0000000000000000  x1  0000000000007c9f  x2  0000000000000006  x3  00000072b6b6cc30
    x4  6f646277641f666d  x5  6f646277641f666d  x6  6f646277641f666d  x7  7f7f7f7f7f7f7f7f
    x8  00000000000000f0  x9  00000076bd72f3e8  x10 ffffff80fffffb9f  x11 0000000000000001
    x12 00000072b6b6b990  x13 00000000000008f9  x14 00000072b6b6ba40  x15 000002e182129de7
    x16 00000076bd7e0fe0  x17 00000076bd7ccb00  x18 00000072b40cc000  x19 0000000000007c2c
    x20 0000000000007c9f  x21 00000000ffffffff  x22 0000000000000000  x23 b4000075dabcdc40
    x24 0000000000fffff9  x25 000000005a000000  x26 00000072b6b6fa80  x27 00000072b6b6cfb8
    x28 b4000075faaf5090  x29 00000072b6b6ccb0
    lr  00000076bd7688e8  sp  00000072b6b6cc10  pc  00000076bd768918  pst 0000000000001000
31 total frames
backtrace:
      #00 pc 000000000005c918  /apex/com.android.runtime/lib64/bionic/libc.so (abort+172) (BuildId: 64eb5106bc8ae51d575bce9d5c64cec5)
      #01 pc 0000000000933abc  /apex/com.android.art/lib64/libart.so (art::Runtime::Abort(char const*)+344) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #02 pc 00000000000160fc  /apex/com.android.art/lib64/libbase.so (android::base::SetAborter(std::__1::function<void (char const*)>&&)::$_0::__invoke(char const*)+80) (BuildId: 1470f61c05962eb04fafe76bd58bf664)
      #03 pc 00000000000156d0  /apex/com.android.art/lib64/libbase.so (android::base::LogMessage::~LogMessage()+516) (BuildId: 1470f61c05962eb04fafe76bd58bf664)
      #04 pc 000000000024eb18  /apex/com.android.art/lib64/libart.so (art::ClassLinker::FindClass(art::Thread*, char const*, art::Handle<art::mirror::ClassLoader>)+8400) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #05 pc 000000000073bbf8  /apex/com.android.art/lib64/libart.so (art::JNI<false>::FindClass(_JNIEnv*, char const*)+540) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #06 pc 000000000015bd4c  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/base.apk!libjni_latinime.so (offset 0x260000) (string2jstring(_JNIEnv*, char const*)+80) (BuildId: d776e2210d7aa1944564346b3da80f403843ce13)
      #07 pc 000000000015b7a8  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/base.apk!libjni_latinime.so (offset 0x260000) (BuildId: d776e2210d7aa1944564346b3da80f403843ce13)
      #08 pc 00000000001ffd28  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/base.apk!libjni_latinime.so (offset 0x260000) (whisper_full_with_state+13168) (BuildId: d776e2210d7aa1944564346b3da80f403843ce13)
      #09 pc 0000000000206184  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/base.apk!libjni_latinime.so (offset 0x260000) (whisper_full+84) (BuildId: d776e2210d7aa1944564346b3da80f403843ce13)
      #10 pc 000000000015ae88  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/base.apk!libjni_latinime.so (offset 0x260000) (BuildId: d776e2210d7aa1944564346b3da80f403843ce13)
      #11 pc 00000000000a46b4  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/oat/arm64/base.odex (art_jni_trampoline+180)
      #12 pc 000000000078319c  /apex/com.android.art/lib64/libart.so (nterp_helper+7468) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #13 pc 00000000003ce06c  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/oat/arm64/base.vdex (org.futo.voiceinput.shared.ggml.WhisperGGML.access$inferNative+0)
      #14 pc 0000000000781c54  /apex/com.android.art/lib64/libart.so (nterp_helper+2020) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #15 pc 00000000003cde98  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/oat/arm64/base.vdex (org.futo.voiceinput.shared.ggml.WhisperGGML$infer$2.invokeSuspend+84)
      #16 pc 00000000001dcd10  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/oat/arm64/base.odex (kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith+128)
      #17 pc 00000000001de27c  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/oat/arm64/base.odex (kotlinx.coroutines.DispatchedTask.run+2028)
      #18 pc 000000000043e34c  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.util.concurrent.Executors$RunnableAdapter.call+60)
      #19 pc 00000000004cc1e4  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.util.concurrent.FutureTask.run+164)
      #20 pc 000000000054b4e0  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run+128)
      #21 pc 0000000000515d24  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.util.concurrent.ThreadPoolExecutor.runWorker+724)
      #22 pc 00000000005134d8  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.util.concurrent.ThreadPoolExecutor$Worker.run+56)
      #23 pc 00000000003ee0f0  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.lang.Thread.run+64)
      #24 pc 0000000000368774  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #25 pc 0000000000353f24  /apex/com.android.art/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+132) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #26 pc 0000000000947748  /apex/com.android.art/lib64/libart.so (art::detail::ShortyTraits<(char)86>::Type art::ArtMethod::InvokeInstance<(char)86>(art::Thread*, art::ObjPtr<art::mirror::Object>, art::detail::ShortyTraits<>::Type...)+60) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #27 pc 0000000000636e80  /apex/com.android.art/lib64/libart.so (art::Thread::CreateCallback(void*)+1344) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #28 pc 0000000000636930  /apex/com.android.art/lib64/libart.so (art::Thread::CreateCallbackWithUffdGc(void*)+8) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #29 pc 000000000006d8d0  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+196) (BuildId: 64eb5106bc8ae51d575bce9d5c64cec5)
      #30 pc 000000000005fd34  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+68) (BuildId: 64eb5106bc8ae51d575bce9d5c64cec5)

Crash log 2

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'Sony/XQ-DQ62/XQ-DQ62:15/67.2.A.3.42/067002A003004200521143226:user/release-keys'
Revision: '0'
ABI: 'arm64'
Timestamp: 2025-06-06 16:39:09.755834843-0500
Process uptime: 86460s
Cmdline: org.futo.inputmethod.latin.unstable
pid: 25985, tid: 18345, name: whisper-ggml-in  >>> org.futo.inputmethod.latin.unstable <<<
uid: 10537
tagged_addr_ctrl: 0000000000000001 (PR_TAGGED_ADDR_ENABLE)
pac_enabled_keys: 000000000000000f (PR_PAC_APIAKEY, PR_PAC_APIBKEY, PR_PAC_APDAKEY, PR_PAC_APDBKEY)
signal 6 (SIGABRT), code -1 (SI_QUEUE), fault addr --------
Abort message: 'No pending exception expected: java.util.NoSuchElementException: Char sequence is empty.
  at char kotlin.text.StringsKt___StringsKt.last(java.lang.CharSequence) (SourceFile:25)
  at java.lang.String org.futo.inputmethod.latin.uix.utils.ModelOutputSanitizer.sanitize(java.lang.String, org.futo.inputmethod.latin.uix.utils.TextContext) (SourceFile:121)
  at void org.futo.voiceinput.shared.AudioRecognizer$runnerCallback$1.partialResult(java.lang.String) (SourceFile:37)
  at java.lang.Object org.futo.voiceinput.shared.whisper.MultiModelRunner$run$2$$ExternalSyntheticLambda0.invoke(java.lang.Object) (SourceFile:18)
  at void org.futo.voiceinput.shared.ggml.WhisperGGML.invokePartialResult(java.lang.String) (SourceFile:11)
  at java.lang.String org.futo.voiceinput.shared.ggml.WhisperGGML.inferNative(long, float[], java.lang.String, java.lang.String[], java.lang.String[], int, boolean) (SourceFile:-2)
  at java.lang.String org.futo.voiceinput.shared.ggml.WhisperGGML.access$inferNative(org.futo.voiceinput.shared.ggml.WhisperGGML, long, float[], java.lang.String, java.lang.String[], java.lang.String[], int, boolean) (SourceFile:1)
  at java.lang.Object org.futo.voiceinput.shared.ggml.WhisperGGML$infer$2.invokeSuspend(java.lang.Object) (SourceFile:43)
  at void kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(java.lang.Object) (SourceFile:9)
  at void kotlinx.coroutines.DispatchedTask.run() (SourceFile:115)
  at java.lang.Object java.util.concurrent.Executors$RunnableAdapter.call() (Executors.java:487)
  at void java.util.concurrent.FutureTask.run() (FutureTask.java:264)
  at void java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run() (ScheduledThreadPoolExecutor.java:307)
  at void java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) (ThreadPoolExecutor.java:1145)
  at void java.util.concurrent.ThreadPoolExecutor$Worker.run() (ThreadPoolExecutor.java:644)
  at void java.lang.Thread.run() (Thread.java:1012)'
    x0  0000000000000000  x1  00000000000047a9  x2  0000000000000006  x3  00000073beea0bf0
    x4  6f646277641f666d  x5  6f646277641f666d  x6  6f646277641f666d  x7  7f7f7f7f7f7f7f7f
    x8  00000000000000f0  x9  00000076bd72f3e8  x10 ffffff80fffffb9f  x11 0000000000000001
    x12 00000073bee9f950  x13 00000000000008f9  x14 00000073bee9fa00  x15 000002e175a25604
    x16 00000076bd7e0fe0  x17 00000076bd7ccb00  x18 000000734e7f4000  x19 0000000000006581
    x20 00000000000047a9  x21 00000000ffffffff  x22 0000000000000000  x23 b4000075daba0920
    x24 0000000000fffff9  x25 000000005a000000  x26 00000073beea3a80  x27 00000073beea0f78
    x28 b4000075faaf5090  x29 00000073beea0c70
    lr  00000076bd7688e8  sp  00000073beea0bd0  pc  00000076bd768918  pst 0000000000001000
31 total frames
backtrace:
      #00 pc 000000000005c918  /apex/com.android.runtime/lib64/bionic/libc.so (abort+172) (BuildId: 64eb5106bc8ae51d575bce9d5c64cec5)
      #01 pc 0000000000933abc  /apex/com.android.art/lib64/libart.so (art::Runtime::Abort(char const*)+344) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #02 pc 00000000000160fc  /apex/com.android.art/lib64/libbase.so (android::base::SetAborter(std::__1::function<void (char const*)>&&)::$_0::__invoke(char const*)+80) (BuildId: 1470f61c05962eb04fafe76bd58bf664)
      #03 pc 00000000000156d0  /apex/com.android.art/lib64/libbase.so (android::base::LogMessage::~LogMessage()+516) (BuildId: 1470f61c05962eb04fafe76bd58bf664)
      #04 pc 000000000024eb18  /apex/com.android.art/lib64/libart.so (art::ClassLinker::FindClass(art::Thread*, char const*, art::Handle<art::mirror::ClassLoader>)+8400) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #05 pc 000000000073bbf8  /apex/com.android.art/lib64/libart.so (art::JNI<false>::FindClass(_JNIEnv*, char const*)+540) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #06 pc 000000000015bd4c  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/base.apk!libjni_latinime.so (offset 0x260000) (string2jstring(_JNIEnv*, char const*)+80) (BuildId: d776e2210d7aa1944564346b3da80f403843ce13)
      #07 pc 000000000015b7a8  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/base.apk!libjni_latinime.so (offset 0x260000) (BuildId: d776e2210d7aa1944564346b3da80f403843ce13)
      #08 pc 00000000001ffd28  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/base.apk!libjni_latinime.so (offset 0x260000) (whisper_full_with_state+13168) (BuildId: d776e2210d7aa1944564346b3da80f403843ce13)
      #09 pc 0000000000206184  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/base.apk!libjni_latinime.so (offset 0x260000) (whisper_full+84) (BuildId: d776e2210d7aa1944564346b3da80f403843ce13)
      #10 pc 000000000015ae88  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/base.apk!libjni_latinime.so (offset 0x260000) (BuildId: d776e2210d7aa1944564346b3da80f403843ce13)
      #11 pc 000000000037ef70  /apex/com.android.art/lib64/libart.so (art_quick_generic_jni_trampoline+144) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #12 pc 000000000078319c  /apex/com.android.art/lib64/libart.so (nterp_helper+7468) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #13 pc 00000000003ce06c  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/oat/arm64/base.vdex.Kmnm9A.tmp (deleted)
      #14 pc 0000000000781c54  /apex/com.android.art/lib64/libart.so (nterp_helper+2020) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #15 pc 00000000003cde98  /data/app/~~bFXBFD8_s6-nirmzY9kuzw==/org.futo.inputmethod.latin.unstable-9UAEba2SjkisWk3Av99FnA==/oat/arm64/base.vdex.Kmnm9A.tmp (deleted)
      #16 pc 00000000022b30a0  /memfd:jit-cache (deleted) (offset 0x2000000) (kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith+160)
      #17 pc 00000000022d513c  /memfd:jit-cache (deleted) (offset 0x2000000) (kotlinx.coroutines.DispatchedTask.run+1772)
      #18 pc 000000000043e34c  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.util.concurrent.Executors$RunnableAdapter.call+60)
      #19 pc 00000000004cc1e4  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.util.concurrent.FutureTask.run+164)
      #20 pc 000000000054b4e0  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run+128)
      #21 pc 0000000000515d24  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.util.concurrent.ThreadPoolExecutor.runWorker+724)
      #22 pc 00000000005134d8  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.util.concurrent.ThreadPoolExecutor$Worker.run+56)
      #23 pc 00000000003ee0f0  /data/misc/apexdata/com.android.art/dalvik-cache/arm64/boot.oat (java.lang.Thread.run+64)
      #24 pc 0000000000368774  /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+612) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #25 pc 0000000000353f24  /apex/com.android.art/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+132) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #26 pc 0000000000947748  /apex/com.android.art/lib64/libart.so (art::detail::ShortyTraits<(char)86>::Type art::ArtMethod::InvokeInstance<(char)86>(art::Thread*, art::ObjPtr<art::mirror::Object>, art::detail::ShortyTraits<>::Type...)+60) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #27 pc 0000000000636e80  /apex/com.android.art/lib64/libart.so (art::Thread::CreateCallback(void*)+1344) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #28 pc 0000000000636930  /apex/com.android.art/lib64/libart.so (art::Thread::CreateCallbackWithUffdGc(void*)+8) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
      #29 pc 000000000006d8d0  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+196) (BuildId: 64eb5106bc8ae51d575bce9d5c64cec5)
      #30 pc 000000000005fd34  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+68) (BuildId: 64eb5106bc8ae51d575bce9d5c64cec5)