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Issue created by Derek Bruening@derekbrueningContributor

ASSERT decode-stress translate.c:1094

This showed up on Windows 32-bit:

https://github.com/DynamoRIO/dynamorio/pull/4722/checks?check_run_id=1846725471

2021-02-06T23:18:34.8554457Z 32: Test command: /home/runner/work/dynamorio/dynamorio/build_debug-internal-32/bin32/drrun "-s" "90" "-quiet" "-debug" "-killpg" "-stderr_mask" "0xC" "-dumpcore_mask" "0" "-code_api" "--" "/home/runner/work/dynamorio/dynamorio/build_debug-internal-32/suite/tests/bin/linux.execve-rec"
2021-02-06T23:18:34.8555892Z 32: Test timeout computed to be: 600
2021-02-06T23:18:34.8556319Z 13: Start
2021-02-06T23:18:34.8556816Z 13: Jumping to a sequence of every addr16 modrm byte
2021-02-06T23:18:34.8557360Z 32: under DynamoRIO
2021-02-06T23:18:34.8557728Z 32: Sum(10)
2021-02-06T23:18:34.8558229Z 32: under DynamoRIO
2021-02-06T23:18:34.8558623Z 32: under DynamoRIO
2021-02-06T23:18:34.8559151Z 32: under DynamoRIO
2021-02-06T23:18:34.8559559Z 32: under DynamoRIO
2021-02-06T23:18:34.8561218Z 13: <Application /home/runner/work/dynamorio/dynamorio/build_debug-internal-32/suite/tests/bin/common.decode (18761).  Internal Error: DynamoRIO debug check failure: /home/runner/work/dynamorio/dynamorio/core/translate.c:1094 false
2021-02-06T23:18:34.8562479Z 13: (Error occurred @2432 frags)
2021-02-06T23:18:34.8562940Z 13: version 8.0.18664, custom build
2021-02-06T23:18:34.8564763Z 13: -no_dynamic_options -code_api -stderr_mask 12 -stack_size 56K -signal_stack_size 32K -max_elide_jmp 0 -max_elide_call 0 -early_inject -emulate_brk -no_inline_ignored_syscalls -native_exec_default_list '' -no_native_exec_managed_code -no_indcall2direct -stress_recreate_pc -stress_recreate_state 
2021-02-06T23:18:34.8566131Z 13: 0x3f7fe298 0xf7c7080f
2021-02-06T23:18:34.8566568Z 13: 0x3f7fe4d8 0xf7d68dd0
2021-02-06T23:18:34.8566991Z 13: 0x3f7fe578 0xf7d6a928
2021-02-06T23:18:34.8567545Z 13: 0x3f7feb28 0xf7d6ac25
2021-02-06T23:18:34.8567956Z 13: 0x3f7fede8 0xf7c670f2
2021-02-06T23:18:34.8568506Z 13: 0x3f7fee18 0xf7dd357e
2021-02-06T23:18:34.8569173Z 13: 0x3f7fef48 0xf7c58750
2021-02-06T23:18:34.8569599Z 13: 0x3f7fefe8 0x3f7a6fce
2021-02-06T23:18:34.8570037Z 13: 0xffa20008 0xffa20078
2021-02-06T23:18:34.8570438Z 13: 0xf79d1f88 0x00000000
2021-02-06T23:18:34.8571562Z 13: /home/runner/work/dynamorio/dynamorio/build_debug-internal-32/lib32/debug/libdynamorio.so=0xf7bc2000>
2021-02-06T23:18:34.8573488Z  33/346 Test  #13: code_api|common.decode-stress ....................................***Failed

Wow, and it showed up on Linux x86-64: https://github.com/DynamoRIO/dynamorio/pull/4722/checks?check_run_id=1846725471