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Bug#1118478: hipcc: rocm-llvm crashes with 'double free or corruption (!prev)' when building rccl-6.4.4

Control: reassgin -1 clang-21 1:21.1.3-1

Hi Tim,

On 2025-10-20 16:27, Tim Flink wrote:
I'm working to update the rccl package [1] to 6.4.4 (my WIP package is [2]) but building rccl with the recently updated rocm-llvm produces a crash when linking: 


double free or corruption (!prev)
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace. 
Stack dump:
0.      Running pass 'CallGraph Pass Manager' on module 'ld-temp.o'.
1.      Running pass 'Machine Instruction Scheduler' on function '@_ZN12_GLOBAL__N_113runTreeUpDownIj13FuncPreMulSumIjE11ProtoSimpleILi1ELi1ELi2ELi0ELi0EELi2EEEviiP15ncclDevWorkColl' 
double free or corruption (!prev)
clang++-21: error: unable to execute command: Aborted
clang++-21: error: amdgcn-link command failed due to signal (use -v to see invocation) 
Debian clang version 21.1.3 (1)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm-21/bin


[1] https://salsa.debian.org/rocm-team/rccl
[2] https://salsa.debian.org/tflink/rccl/-/tree/debian/experimental?ref_type=heads
This machine is a VM, the build is being done in sbuild w/ unshare and a chroot that was updated on October 20, 2025. 

-- System Information:
Debian Release: forky/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.48+deb13-amd64 (SMP w/32 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set 
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages hipcc depends on:
ii  clang-21             1:21.1.3-1
ii  clang-tools-21       1:21.1.3-1
ii  libamdhip64-dev      5.7.1-7
ii  libc6                2.41-12
ii  libclang-rt-21-dev   1:21.1.3-1
ii  libgcc-s1            15.2.0-4
ii  libstdc++6           15.2.0-4
ii  lld-21               1:21.1.3-1
ii  llvm-21              1:21.1.3-1
ii  rocm-device-libs-21  7.0.1+dfsg-1
ii  rocminfo             6.4.3-1

hipcc recommends no packages.
hipcc suggests no packages.
Reassigning to clang-21 as the crash occurs in clang itself, which should never happen regardless of what arguments hipcc passes. I can reproduce your bug with clang-21 1:21.1.4-1. Unfortunately, the failure occurs during linking, I'm unsure of how to provide a simple reproduction for the problem. I can provide the clang command that failed, though: 

double free or corruption (!prev)
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace. 
Stack dump:
0.    Running pass 'CallGraph Pass Manager' on module 'ld-temp.o'.
1.    Running pass 'Machine Instruction Scheduler' on function '@_ZN12_GLOBAL__N_113runTreeUpDownIj13FuncPreMulSumIjE11ProtoSimpleILi1ELi1ELi2ELi0ELi0EELi2EEEviiP15ncclDevWorkColl' 
double free or corruption (!prev)
clang++-21: error: unable to execute command: Aborted
clang++-21: error: amdgcn-link command failed due to signal (use -v to see invocation) 
Debian clang version 21.1.4 (1)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm-21/bin
clang++-21: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated] clang++-21: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated] clang++-21: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated] 
clang++-21: note: diagnostic msg: Error generating preprocessed source(s).
failed to execute:/usr/bin/clang++-21 --driver-mode=g++ --hip-link --offload-arch=gfx803 --offload-arch=gfx900 --offload-arch=gfx906 --offload-arch=gfx908 --offload-arch=gfx90a --offload-arch=gfx1010 --offload-arch=gfx1030 --offload-arch=gfx1100 --offload-arch=gfx1101 --offload-arch=gfx1102  -fPIC -gz -g -O2 -ffile-prefix-map=/root/rccl/rccl=. -Xarch_host -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Xarch_host -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -O3 -DNDEBUG -Xlinker --dependency-file=CMakeFiles/rccl.dir/link.d -v -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,librccl.so.1 -o "librccl.so.1.0" CMakeFiles/rccl.dir/hipify/src/bootstrap.cc.o CMakeFiles/rccl.dir/hipify/src/channel.cc.o CMakeFiles/rccl.dir/hipify/src/collectives.cc.o CMakeFiles/rccl.dir/hipify/src/debug.cc.o CMakeFiles/rccl.dir/hipify/src/enqueue.cc.o CMakeFiles/rccl.dir/hipify/src/group.cc.o CMakeFiles/rccl.dir/hipify/src/init.cc.o CMakeFiles/rccl.dir/hipify/src/init_nvtx.cc.o CMakeFiles/rccl.dir/hipify/src/net.cc.o CMakeFiles/rccl.dir/hipify/src/msccl.cc.o CMakeFiles/rccl.dir/hipify/src/proxy.cc.o CMakeFiles/rccl.dir/hipify/src/rccl_wrap.cc.o CMakeFiles/rccl.dir/hipify/src/register.cc.o CMakeFiles/rccl.dir/hipify/src/transport.cc.o CMakeFiles/rccl.dir/hipify/src/device/common.cu.cpp.o CMakeFiles/rccl.dir/hipify/src/device/onerank.cu.cpp.o CMakeFiles/rccl.dir/hipify/src/graph/connect.cc.o CMakeFiles/rccl.dir/hipify/src/graph/paths.cc.o CMakeFiles/rccl.dir/hipify/src/graph/rings.cc.o CMakeFiles/rccl.dir/hipify/src/graph/rome_models.cc.o CMakeFiles/rccl.dir/hipify/src/graph/search.cc.o CMakeFiles/rccl.dir/hipify/src/graph/topo.cc.o CMakeFiles/rccl.dir/hipify/src/graph/trees.cc.o CMakeFiles/rccl.dir/hipify/src/graph/tuning.cc.o CMakeFiles/rccl.dir/hipify/src/graph/xml.cc.o CMakeFiles/rccl.dir/hipify/src/misc/alt_rsmi.cc.o CMakeFiles/rccl.dir/hipify/src/misc/archinfo.cc.o CMakeFiles/rccl.dir/hipify/src/misc/argcheck.cc.o 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/usr/lib/x86_64-linux-gnu/librocm_smi64.so.1.0 /usr/lib/x86_64-linux-gnu/libamdhip64.so.5.7.31921 --hip-link /usr/lib/llvm-21/lib/clang/21/lib/linux/libclang_rt.builtins-x86_64.a -lpthread -lrt -ldl 

-- System Information:
Debian Release: forky/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 6.16.12+deb14+1-amd64 (SMP w/32 CPU threads; PREEMPT)
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: unable to detect

Versions of packages clang-21 depends on:
ii  binutils                2.45-7
ii  libc6                   2.41-12
ii  libc6-dev               2.41-12
ii  libclang-common-21-dev  1:21.1.4-1
ii  libclang-cpp21          1:21.1.4-1
ii  libclang1-21            1:21.1.4-1
ii  libgcc-15-dev           15.2.0-5
ii  libgcc-s1               15.2.0-5
ii  libllvm21               1:21.1.4-1
ii  libobjc-15-dev          15.2.0-5
ii  libstdc++-15-dev        15.2.0-5
ii  libstdc++6              15.2.0-5
ii  llvm-21-linker-tools    1:21.1.4-1

Versions of packages clang-21 recommends:
ii  clang-tools-21  1:21.1.4-1
pn  llvm-21-dev     <none>
ii  python3         3.13.7-1

Versions of packages clang-21 suggests:
pn  clang-21-doc  <none>
pn  wasi-libc     <none>

-- no debconf information
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