[clang] [clang][bytecode] Check reads for null block pointers (PR #157695)
LLVM Continuous Integration via cfe-commits
cfe-commits at lists.llvm.org
Wed Sep 10 22:04:39 PDT 2025
llvm-ci wrote:
LLVM Buildbot has detected a new failure on builder `lldb-remote-linux-ubuntu` running on `as-builder-9` while building `clang` at step 16 "test-check-lldb-api".
Full details are available at: https://lab.llvm.org/buildbot/#/builders/195/builds/14437
<details>
<summary>Here is the relevant piece of the build log for the reference</summary>
```
Step 16 (test-check-lldb-api) failure: Test just built components: check-lldb-api completed (failure)
******************** TEST 'lldb-api :: functionalities/postmortem/netbsd-core/TestNetBSDCore.py' FAILED ********************
Script:
--
/usr/bin/python3.12 /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./lib --env LLVM_INCLUDE_DIR=/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/include --env LLVM_TOOLS_DIR=/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./bin --libcxx-include-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/include/c++/v1 --libcxx-include-target-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/include/aarch64-unknown-linux-gnu/c++/v1 --libcxx-library-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./lib/aarch64-unknown-linux-gnu --arch aarch64 --build-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/lldb-test-build.noindex --lldb-module-cache-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/lldb-test-build.noindex/module-cache-lldb/lldb-api --clang-module-cache-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/lldb-test-build.noindex/module-cache-clang/lldb-api --executable /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./bin/lldb --compiler /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang --dsymutil /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./bin/dsymutil --make /usr/bin/gmake --llvm-tools-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./bin --lldb-obj-root /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/tools/lldb --lldb-libs-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./lib --cmake-build-type Release --platform-url connect://jetson-agx-2198.lab.llvm.org:1234 --platform-working-dir /home/ubuntu/lldb-tests --sysroot /mnt/fs/jetson-agx-ubuntu --env ARCH_CFLAGS=-mcpu=cortex-a78 --platform-name remote-linux --skip-category=lldb-server /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/lldb/test/API/functionalities/postmortem/netbsd-core -p TestNetBSDCore.py
--
Exit Code: -6
Command Output (stdout):
--
lldb version 22.0.0git (https://github.com/llvm/llvm-project.git revision 21b99e1311547dbe4807b4d1af8f5043cb82539f)
clang revision 21b99e1311547dbe4807b4d1af8f5043cb82539f
llvm revision 21b99e1311547dbe4807b4d1af8f5043cb82539f
Setting up remote platform 'remote-linux'
Connecting to remote platform 'remote-linux' at 'connect://jetson-agx-2198.lab.llvm.org:1234'...
Connected.
Setting remote platform working directory to '/home/ubuntu/lldb-tests'...
Skipping the following test categories: ['lldb-server', 'msvcstl', 'dsym', 'gmodules', 'debugserver', 'objc', 'lldb-dap']
--
Command Output (stderr):
--
WARNING:root:Custom libc++ is not supported for remote runs: ignoring --libcxx arguments
PASS: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_aarch64_single_threaded (TestNetBSDCore.NetBSD1LWPCoreTestCase.test_aarch64_single_threaded)
UNSUPPORTED: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_amd64_single_threaded (TestNetBSDCore.NetBSD1LWPCoreTestCase.test_amd64_single_threaded) (requires X86)
PASS: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_aarch64_process_signaled (TestNetBSDCore.NetBSD2LWPProcessSigCoreTestCase.test_aarch64_process_signaled)
UNSUPPORTED: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_amd64_process_signaled (TestNetBSDCore.NetBSD2LWPProcessSigCoreTestCase.test_amd64_process_signaled) (requires X86)
PASS: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_aarch64_thread_signaled (TestNetBSDCore.NetBSD2LWPT2CoreTestCase.test_aarch64_thread_signaled)
UNSUPPORTED: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_amd64_thread_signaled (TestNetBSDCore.NetBSD2LWPT2CoreTestCase.test_amd64_thread_signaled) (requires X86)
----------------------------------------------------------------------
Ran 6 tests in 0.129s
OK (skipped=3)
double free or corruption (fasttop)
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0 _lldb.cpython-312-x86_64-linux-gnu.so 0x00007891e9e97922
1 _lldb.cpython-312-x86_64-linux-gnu.so 0x00007891e9e9481f
2 _lldb.cpython-312-x86_64-linux-gnu.so 0x00007891e9e9496c
3 libc.so.6 0x00007891f0e45330
4 libc.so.6 0x00007891f0e9eb2c pthread_kill + 284
5 libc.so.6 0x00007891f0e4527e gsignal + 30
6 libc.so.6 0x00007891f0e288ff abort + 223
7 libc.so.6 0x00007891f0e297b6
8 libc.so.6 0x00007891f0ea8ff5
9 libc.so.6 0x00007891f0eab32a
10 libc.so.6 0x00007891f0eae001
11 libc.so.6 0x00007891f0e9c895
12 libc.so.6 0x00007891f0f29c3c
Fatal Python error: Aborted
...
```
</details>
https://github.com/llvm/llvm-project/pull/157695
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