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[Bug 2121086] [NEW] kdenlive seg fault after first run

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Public bug reported:

mkdir("/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64", 0777) = -1 EEXIST (File exists)
newfstatat(AT_FDCWD, "/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64", {st_mode=S_IFDIR|0775, st_size=4096, ...}, 0) = 0
access("/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64/", W_OK) = 0
openat(AT_FDCWD, "/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64/qqpc_vulkan.lck", O_RDWR|O_CREAT|O_EXCL|O_CLOEXEC, 0666) = 86
flock(86, LOCK_EX|LOCK_NB)              = 0
openat(AT_FDCWD, "/proc/sys/kernel/random/boot_id", O_RDONLY|O_CLOEXEC) = 90
read(90, "080f656d-231a-4d72-9b6c-a274781f"..., 36) = 36
close(90)                               = 0
openat(AT_FDCWD, "/var/lib/dbus/machine-id", O_RDONLY|O_CLOEXEC) = 90
read(90, "93c74046e3f94e8da190afd925e12e5b", 32) = 32
close(90)                               = 0
uname({sysname="Linux", nodename="black", ...}) = 0
getpid()                                = 243326
readlink("/proc/243326/exe", "/usr/bin/kdenlive", 256) = 17
getpid()                                = 243326
write(86, "243326\nkdenlive\nblack\n93c74046e3"..., 92) = 92
fdatasync(86)                           = 0
openat(AT_FDCWD, "/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64/qqpc_vulkan", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
close(86)                               = 0
unlink("/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64/qqpc_vulkan.lck") = 0
getpid()                                = 243326
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c17f0) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c1640) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x57, 0x38), 0x7fff377c1510) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c1900) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c17a0) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x58, 0x30), 0x7fff377c1b00) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x57, 0x38), 0x7fff377c1b30) = 0
getpid()                                = 243326
getpid()                                = 243326
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c18b0) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c1700) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x57, 0x38), 0x7fff377c15d0) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c19c0) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c1860) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x58, 0x30), 0x7fff377c1bc0) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x57, 0x38), 0x7fff377c1bf0) = 0
getpid()                                = 243326
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c18c0) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x58, 0x30), 0x7fff377c1be0) = 0
ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x57, 0x38), 0x7fff377c1c10) = 0
write(2, "begin\n", 6begin
)                  = 6
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x8} ---
+++ killed by SIGSEGV (core dumped) +++
Segmentation fault (core dumped)

ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: kdenlive 4:24.12.3-0ubuntu1
ProcVersionSignature: Ubuntu 6.14.0-27.27-generic 6.14.6
Uname: Linux 6.14.0-27-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.32.0-0ubuntu5.3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Wed Aug 20 20:43:10 2025
InstallationDate: Installed on 2025-06-18 (63 days ago)
InstallationMedia: Kubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: kdenlive
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: kdenlive (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug plucky

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https://bugs.launchpad.net/bugs/2121086

Title:
  kdenlive seg fault after first run

Status in kdenlive package in Ubuntu:
  New

Bug description:
  mkdir("/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64", 0777) = -1 EEXIST (File exists)
  newfstatat(AT_FDCWD, "/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64", {st_mode=S_IFDIR|0775, st_size=4096, ...}, 0) = 0
  access("/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64/", W_OK) = 0
  openat(AT_FDCWD, "/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64/qqpc_vulkan.lck", O_RDWR|O_CREAT|O_EXCL|O_CLOEXEC, 0666) = 86
  flock(86, LOCK_EX|LOCK_NB)              = 0
  openat(AT_FDCWD, "/proc/sys/kernel/random/boot_id", O_RDONLY|O_CLOEXEC) = 90
  read(90, "080f656d-231a-4d72-9b6c-a274781f"..., 36) = 36
  close(90)                               = 0
  openat(AT_FDCWD, "/var/lib/dbus/machine-id", O_RDONLY|O_CLOEXEC) = 90
  read(90, "93c74046e3f94e8da190afd925e12e5b", 32) = 32
  close(90)                               = 0
  uname({sysname="Linux", nodename="black", ...}) = 0
  getpid()                                = 243326
  readlink("/proc/243326/exe", "/usr/bin/kdenlive", 256) = 17
  getpid()                                = 243326
  write(86, "243326\nkdenlive\nblack\n93c74046e3"..., 92) = 92
  fdatasync(86)                           = 0
  openat(AT_FDCWD, "/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64/qqpc_vulkan", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
  close(86)                               = 0
  unlink("/home/spider/.cache/kdenlive/qtpipelinecache-x86_64-little_endian-lp64/qqpc_vulkan.lck") = 0
  getpid()                                = 243326
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c17f0) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c1640) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x57, 0x38), 0x7fff377c1510) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c1900) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c17a0) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x58, 0x30), 0x7fff377c1b00) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x57, 0x38), 0x7fff377c1b30) = 0
  getpid()                                = 243326
  getpid()                                = 243326
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c18b0) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c1700) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x57, 0x38), 0x7fff377c15d0) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c19c0) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c1860) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x58, 0x30), 0x7fff377c1bc0) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x57, 0x38), 0x7fff377c1bf0) = 0
  getpid()                                = 243326
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x4a, 0xb8), 0x7fff377c18c0) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x58, 0x30), 0x7fff377c1be0) = 0
  ioctl(10, _IOC(_IOC_READ|_IOC_WRITE, 0x46, 0x57, 0x38), 0x7fff377c1c10) = 0
  write(2, "begin\n", 6begin
  )                  = 6
  --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x8} ---
  +++ killed by SIGSEGV (core dumped) +++
  Segmentation fault (core dumped)

  ProblemType: Bug
  DistroRelease: Ubuntu 25.04
  Package: kdenlive 4:24.12.3-0ubuntu1
  ProcVersionSignature: Ubuntu 6.14.0-27.27-generic 6.14.6
  Uname: Linux 6.14.0-27-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.32.0-0ubuntu5.3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: KDE
  Date: Wed Aug 20 20:43:10 2025
  InstallationDate: Installed on 2025-06-18 (63 days ago)
  InstallationMedia: Kubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: kdenlive
  UpgradeStatus: No upgrade log present (probably fresh install)

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