Investigating a segmentation fault running minimal-qml (wayland compositor example)

adam.yh.lee

It looks like the path set to look for Qt Plugin is not working:

stat64("/usr/share/qt5/examples/wayland/qwindow-compositor/wayland-graphics-integration-server/.", 0xbeb1e608) = -1 ENOENT (No such file or directory)

I don't believe it should look for wayland-graphics-integration-server in the project directory.
Rather, it is located here:

# find / -name wayland-graphics-integration-client
/usr/lib/qt5/plugins/wayland-graphics-integration-client

I have tried setting "QT_PLUGIN_PATH", but still no difference.

Here is more bits of the log just in case:

lstat64("/usr/lib/qt5/plugins/wayland-graphics-integration-server/libwayland-egl.so", {st_mode=S_IFREG|0755, st_size=22116, ...}) = 0
openat(AT_FDCWD, "/usr/lib/qt5/plugins/wayland-graphics-integration-server/libwayland-egl.so", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 19
fcntl64(19, F_SETFD, FD_CLOEXEC)        = 0
fstat64(19, {st_mode=S_IFREG|0755, st_size=22116, ...}) = 0
fstat64(19, {st_mode=S_IFREG|0755, st_size=22116, ...}) = 0
mmap2(NULL, 22116, PROT_READ, MAP_SHARED, 19, 0) = 0xb3359000
close(19)                               = 0
munmap(0xb3359000, 22116)               = 0
stat64("/usr/share/qt5/examples/wayland/qwindow-compositor/wayland-graphics-integration-server/.", 0xbeb1e600) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/qt5/plugins/wayland-graphics-integration-server/libwayland-egl.so", O_RDONLY|O_CLOEXEC) = 19
read(19, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\10\32\0\0004\0\0\0"..., 512) = 512
fstat64(19, {st_mode=S_IFREG|0755, st_size=22116, ...}) = 0
mmap2(NULL, 86308, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 19, 0) = 0xb245a000
mprotect(0xb245f000, 61440, PROT_NONE)  = 0
mmap2(0xb246e000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 19, 0x4000) = 0xb246e000
close(19)                               = 0
mprotect(0xb246e000, 4096, PROT_READ)   = 0
stat64("/usr/lib/qt5/plugins/wayland-graphics-integration-server/.", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/usr/lib/qt5/plugins/wayland-graphics-integration-server", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = 19
fstat64(19, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
getdents64(19, /* 3 entries */, 32768)  = 88
getdents64(19, /* 0 entries */, 32768)  = 0
close(19)                               = 0
lstat64("/usr", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat64("/usr/lib", {st_mode=S_IFDIR|0755, st_size=61440, ...}) = 0
lstat64("/usr/lib/qt5", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat64("/usr/lib/qt5/plugins", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat64("/usr/lib/qt5/plugins/wayland-graphics-integration-server", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat64("/usr/lib/qt5/plugins/wayland-graphics-integration-server/libwayland-egl.so", {st_mode=S_IFREG|0755, st_size=22116, ...}) = 0
stat64("/usr/share/qt5/examples/wayland/qwindow-compositor/wayland-graphics-integration-server/.", 0xbeb1e608) = -1 ENOENT (No such file or directory)
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x4} ---
+++ killed by SIGSEGV (core dumped) +++
Segmentation fault (core dumped)

update

Realized seg fault isn't happening because of the missing file. It is memory access violation (to address 0x4). Any thoughts?