Bug 2361829

Summary: [abrt] clang-tools-extra: (anonymous namespace)::TemplateArgumentHasher::AddTemplateArgument(): clangd killed by SIGILL
Product: [Fedora] Fedora Reporter: Ricardo Garcia <rgarcia>
Component: llvmAssignee: Tom Stellard <tstellar>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 42CC: dmalcolm, fedora-llvm-team, jakub, jchecahi, jistone, kkleine, npopov, rgarcia, scottt.tw, sergesanspaille, siddharth.kde, suraj.ghimire7, tbaeder, tstellar, tuliom
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
URL: https://retrace.fedoraproject.org/faf/reports/bthash/ad4c19f53cd2382afef9b14fc5743d3f8ca13cd
Whiteboard: abrt_hash:2f72d98a0688e360c4c1cc78db9b58d8e609656d;VARIANT_ID=workstation;
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2025-05-20 14:21:07 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
File: proc_pid_status
none
File: maps
none
File: limits
none
File: environ
none
File: open_fds
none
File: mountinfo
none
File: os_info
none
File: cpuinfo
none
File: core_backtrace
none
File: exploitable
none
File: backtrace none

Description Ricardo Garcia 2025-04-23 09:12:59 UTC 
Description of problem:
I was editing some C++ code in VSCode using the official clangd extension for code completion.

Version-Release number of selected component:
clang-tools-extra-20.1.2-3.fc42

Additional info:
reporter:       libreport-2.17.15
type:           CCpp
reason:         clangd killed by SIGILL
journald_cursor: s=3331c0c5da6a4d3b9af32d20bd6d0365;i=103bca;b=67490499d4244526b355c7ced2758143;m=1b1a0a49c;t=6336e6c7ee569;x=a4a4d9c700b61526
executable:     /usr/lib64/llvm20/bin/clangd
cmdline:        /usr/bin/clangd --compile-commands-dir=/home/rgarcia/devel/vk-gl-cts/build --header-insertion=never
cgroup:         0::/user.slice/user-1000.slice/user/app.slice/kitty-6585-1.scope
rootdir:        /
uid:            1000
kernel:         6.14.2-300.fc42.x86_64
package:        clang-tools-extra-20.1.2-3.fc42
runlevel:       N 5
dso_list:       /usr/lib64/llvm20/bin/clangd clang-tools-extra-20.1.2-3.fc42.x86_64 (Fedora Project) 1745227286
backtrace_rating: 4
crash_function: (anonymous namespace)::TemplateArgumentHasher::AddTemplateArgument
comment:        I was editing some C++ code in VSCode using the official clangd extension for code completion.

Truncated backtrace:
Thread no. 0 (4 frames)
 #0 (anonymous namespace)::TemplateArgumentHasher::AddTemplateArgument at /usr/src/debug/llvm-20.1.2-3.fc42.x86_64/clang/lib/Serialization/TemplateArgumentHasher.cpp:68
 #1 clang::serialization::StableHashForTemplateArguments at /usr/src/debug/llvm-20.1.2-3.fc42.x86_64/clang/lib/Serialization/TemplateArgumentHasher.cpp:407
 #2 clang::ASTReader::LoadExternalSpecializationsImpl at /usr/src/debug/llvm-20.1.2-3.fc42.x86_64/clang/lib/Serialization/ASTReader.cpp:8326
 #3 clang::ASTReader::LoadExternalSpecializations at /usr/src/debug/llvm-20.1.2-3.fc42.x86_64/clang/lib/Serialization/ASTReader.cpp:8350
Comment 1 Ricardo Garcia 2025-04-23 09:13:05 UTC 
Created attachment 2086624 [details]
File: proc_pid_status
Comment 2 Ricardo Garcia 2025-04-23 09:13:06 UTC 
Created attachment 2086625 [details]
File: maps
Comment 3 Ricardo Garcia 2025-04-23 09:13:08 UTC 
Created attachment 2086626 [details]
File: limits
Comment 4 Ricardo Garcia 2025-04-23 09:13:10 UTC 
Created attachment 2086627 [details]
File: environ
Comment 5 Ricardo Garcia 2025-04-23 09:13:11 UTC 
Created attachment 2086628 [details]
File: open_fds
Comment 6 Ricardo Garcia 2025-04-23 09:13:13 UTC 
Created attachment 2086629 [details]
File: mountinfo
Comment 7 Ricardo Garcia 2025-04-23 09:13:14 UTC 
Created attachment 2086630 [details]
File: os_info
Comment 8 Ricardo Garcia 2025-04-23 09:13:16 UTC 
Created attachment 2086631 [details]
File: cpuinfo
Comment 9 Ricardo Garcia 2025-04-23 09:13:17 UTC 
Created attachment 2086632 [details]
File: core_backtrace
Comment 10 Ricardo Garcia 2025-04-23 09:13:19 UTC 
Created attachment 2086633 [details]
File: exploitable
Comment 11 Ricardo Garcia 2025-04-23 09:13:21 UTC 
Created attachment 2086634 [details]
File: backtrace
Comment 12 alex 2025-05-19 00:34:35 UTC 
I was editing a C++ file using Helix.


reporter:       libreport-2.17.15
type:           CCpp
reason:         clangd killed by SIGILL
journald_cursor: s=36eff30049354c35addc0cb3007bc757;i=4eec4d;b=7faa768257f249819636cdaadc7460ab;m=21432783c;t=6356f7a1f1ee2;x=4efe859683821a46
executable:     /usr/lib64/llvm20/bin/clangd
cmdline:        /usr/bin/clangd
cgroup:         0::/user.slice/user-1000.slice/user/app.slice/ptyxis-spawn-f50bcd98-d534-4900-8fdc-f5d8993274aa.scope
rootdir:        /
uid:            1000
kernel:         6.14.6-300.fc42.x86_64
package:        clang-tools-extra-20.1.3-1.fc42
runlevel:       N 5
backtrace_rating: 4
crash_function: (anonymous namespace)::TemplateArgumentHasher::AddTemplateArgument
comment:        I was editing a C++ file using Helix.
Comment 13 Timm Bäder 2025-05-20 14:21:07 UTC 
Thanks for the report, the backtrace looks exactly like the one in https://bugzilla.redhat.com/show_bug.cgi?id=2363895, unfortunately the author of the offending patch won't have time to look into this problem.

*** This bug has been marked as a duplicate of bug 2363895 ***
Comment 14 Ricardo Garcia 2025-05-20 14:32:51 UTC 
Thanks for looking into this! As a workaround, I've downloaded the Linux binary release of clangd 19.1.2 from https://github.com/clangd/clangd/releases/tag/19.1.2 and dumped it somewhere in my home directory. The official VSCode clangd plugin allows you to specify the clangd binary path. Version 19.1.2 does not crash, so I can work normally for now.