使用Wx的Perl在调试模式下生成内核转储（选项-d）

我有以下三行示例来显示错误：

use strict;
use warnings;
use Wx;

当我使用

perl-whue5.pl

运行它时，它工作得很好。但是，当我添加调试选项并使用

perl-w-d hue5.pl

启动if时，出现了一个问题，perl运行时崩溃，并说：

从perl5db.pl版本1.55加载数据库例程 编辑器支持可用

输入h或“h”以获取帮助，或输入“man perldebug”以获取更多帮助

Wx:：CODE（0x5604c197ca80）（/usr/lib64/perl5/vendor_perl/Wx.pm:154）： 154：未设置常量（）如果已定义&未设置常量； 双重自由或腐败（！prev） 中止（堆芯转储）

我在64位Linux（最新的Fedora版本31）上使用perl v5.30.3，并从二进制软件包perl-Wx-0.9932-15.fc31.x86_64.rpm安装Wx

---

还有其他人有这个问题吗？

简短版本：卸载包

perl Term ReadLine Gnu

解决了这个问题

更长的版本：我看到问题并不总是发生。事实上，这似乎取决于流程环境的大小。在调试时，我可以通过在

bash

中声明使崩溃出现（注意：如果没有

export

，则不会显示问题）

然后消失

unset SOMEVAR

最后，在进一步的实验中，我曾经得到一条更详细的失败消息，指向Readline/Gnu：

信号SEGV位于/usr/lib64/perl5/vendor_perl/Term/ReadLine/Gnu.pm第504行。 Term：：ReadLine：：Gnu：：装饰（Term：：ReadLine=HASH（0x5593c12e5190），1）>在/usr/lib64/perl5/vendor_perl/Term/ReadLine/Gnu.pm第301行调用 Term:：ReadLine:：Gnu:：new（“Term:：ReadLine”、“perldb”、GLOB（0x5593c062df58）、GLOB（0x5593c05c6ea8））调用于/usr/share/perl5/perl5db.pl第6865行 在/usr/share/perl5/perl5db.pl第1849行调用DB:：setterm（） DB:：_DB__read_next_cmd（undf）在/usr/share/perl5/perl5db.pl行2789处调用 DB:：在f.pl第5行调用DB

出于好奇，我注意到/usr/lib64/perl5/vendor_perl/Term/ReadLine/Gnu.pm中的第504行是：

return Term::ReadLine::Gnu::XS::ornaments(@_);

更奇怪的是，我添加了运行生成的

strace

转储，这些转储只在环境中是否存在

SOMEVAR

方面有所不同（请注意，名称似乎并不重要，我首先通过观察不同的行为（取决于

OLDPWD

），了解了环境差异的方向）

首先没有问题（即没有变量

SOMEVAR

），引用加载Readline/Gnu库时的行：

stat("/usr/lib65/perl5/vendor_perl/auto/Term/ReadLine/Gnu/XS/autosplit.ix", {st_mode=S_IFREG|0644, st_size=1137, ...}) = 0
openat(AT_FDCWD, "/usr/lib64/perl5/vendor_perl/auto/Term/ReadLine/Gnu/XS/autosplit.ix", O_RDONLY|O_CLOEXEC) = 13
ioctl(13, TCGETS, 0x7fff0a1cac70)       = -1 ENOTTY (Inappropriate ioctl for device)
lseek(13, 0, SEEK_CUR)                  = 0
read(13, "# Index created by AutoSplit for"..., 8192) = 1137
read(13, "", 8192)                      = 0
close(13)                               = 0
lseek(3, 2189, SEEK_SET)                = 2189
lseek(3, 0, SEEK_CUR)                   = 2189
close(3)                                = 0
getuid()                                = 1000
geteuid()                               = 1000
getgid()                                = 1000
getegid()                               = 1000
fcntl(4, F_GETFL)                       = 0x8002 (flags O_RDWR|O_LARGEFILE)
fcntl(5, F_GETFL)                       = 0x8002 (flags O_RDWR|O_LARGEFILE)
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
stat("/home/bernhard/.terminfo", 0x55ec16193000) = -1 ENOENT (No such file or directory)
stat("/etc/terminfo", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/usr/share/terminfo", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
access("/etc/terminfo/x/xterm-256color", R_OK) = -1 ENOENT (No such file or directory)
access("/usr/share/terminfo/x/xterm-256color", R_OK) = 0
openat(AT_FDCWD, "/usr/share/terminfo/x/xterm-256color", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=3808, ...}) = 0
read(3, "\36\2%\0&\0\17\0\235\0010\6xterm-256color|xterm"..., 32768) = 3808
read(3, "", 28672)                      = 0
close(3)                                = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TIOCGWINSZ, {ws_row=43, ws_col=173, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(4, TIOCGWINSZ, {ws_row=43, ws_col=173, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(4, TIOCGWINSZ, {ws_row=43, ws_col=173, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(4, TIOCSWINSZ, {ws_row=43, ws_col=173, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(4, TCGETS, {B38400 opost isig icanon echo ...}) = 0
openat(AT_FDCWD, "/home/bernhard/.inputrc", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/inputrc", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=943, ...}) = 0
read(3, "# do not bell on tab-completion\n"..., 943) = 943
close(3)                                = 0
brk(NULL)                               = 0x55ec1640f000
brk(0x55ec16430000)                     = 0x55ec16430000
stat("/usr/lib64/perl5/vendor_perl/auto/Term/ReadLine/Gnu/XS/ornaments.al", {st_mode=S_IFREG|0644, st_size=1351, ...}) = 0
geteuid()                               = 1000
geteuid()                               = 1000
getegid()                               = 1000
getgroups(0, NULL)                      = 2
getgroups(2, [18, 1000])                = 2
stat("/usr/lib64/perl5/vendor_perl/auto/Term/ReadLine/Gnu/XS/ornaments.al", {st_mode=S_IFREG|0644, st_size=1351, ...}) = 0
openat(AT_FDCWD, "/usr/lib64/perl5/vendor_perl/auto/Term/ReadLine/Gnu/XS/ornaments.al", O_RDONLY|O_CLOEXEC) = 3
ioctl(3, TCGETS, 0x7fff0a1cb9d0)        = -1 ENOTTY (Inappropriate ioctl for device)
lseek(3, 0, SEEK_CUR)                   = 0
read(3, "# NOTE: Derived from blib/lib/Te"..., 8192) = 1351
read(3, "", 8192)                       = 0
close(3)                                = 0
getpid()                                = 4060
getpid()                                = 4060
ioctl(4, TIOCGWINSZ, {ws_row=43, ws_col=173, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(4, TIOCSWINSZ, {ws_row=43, ws_col=173, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(4, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(4, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig -icanon -echo ...}) = 0
rt_sigprocmask(SIG_BLOCK, [HUP INT QUIT ALRM TERM TSTP TTIN TTOU], [], 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, 8) = 0
rt_sigaction(SIGTERM, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGHUP, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGALRM, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTSTP, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTTOU, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTTIN, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGWINCH, {sa_handler=0x7f4433da22f0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f44490e46b0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
fstat(5, {st_mode=S_IFCHR|0666, st_rdev=makedev(0x5, 0), ...}) = 0
ioctl(5, TCGETS, {B38400 opost isig -icanon -echo ...}) = 0
write(5, "\33[4m  DB<1> \33[24m", 17)   = 17
pselect6(5, [4], NULL, NULL, NULL, {[], 8}) = 1 (in [4])
read(4, "q", 1)                         = 1
select(5, [4], NULL, [4], {tv_sec=0, tv_usec=0}) = 0 (Timeout)
write(5, "q", 1)                        = 1
pselect6(5, [4], NULL, NULL, NULL, {[], 8}) = 1 (in [4])
read(4, "\r", 1)                        = 1
write(5, "\n", 1)                       = 1
ioctl(4, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig icanon echo ...}) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, 8) = 0
rt_sigaction(SIGTERM, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, 8) = 0
rt_sigaction(SIGHUP, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, 8) = 0
rt_sigaction(SIGALRM, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, 8) = 0
rt_sigaction(SIGTSTP, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, 8) = 0
rt_sigaction(SIGTTOU, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, 8) = 0
rt_sigaction(SIGTTIN, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=0x7f4433da2e70, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, 8) = 0
rt_sigaction(SIGWINCH, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f44490e46b0}, {sa_handler=0x7f4433da22f0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f44490e46b0}, 8) = 0
close(4)                                = 0
close(5)                                = 0
exit_group(0)                           = ?
+++ exited with 0 +++

stat("/usr/lib64/perl5/vendor_perl/auto/Term/ReadLine/Gnu/XS/autosplit.ix", {st_mode=S_IFREG|0644, st_size=1137, ...}) = 0
openat(AT_FDCWD, "/usr/lib64/perl5/vendor_perl/auto/Term/ReadLine/Gnu/XS/autosplit.ix", O_RDONLY|O_CLOEXEC) = 13
ioctl(13, TCGETS, 0x7ffe8bf62e00)       = -1 ENOTTY (Inappropriate ioctl for device)
lseek(13, 0, SEEK_CUR)                  = 0
read(13, "# Index created by AutoSplit for"..., 8192) = 1137
read(13, "", 8192)                      = 0
close(13)                               = 0
lseek(3, 2189, SEEK_SET)                = 2189
lseek(3, 0, SEEK_CUR)                   = 2189
close(3)                                = 0
getuid()                                = 1000
geteuid()                               = 1000
getgid()                                = 1000
getegid()                               = 1000
fcntl(4, F_GETFL)                       = 0x8002 (flags O_RDWR|O_LARGEFILE)
fcntl(5, F_GETFL)                       = 0x8002 (flags O_RDWR|O_LARGEFILE)
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
stat("/home/bernhard/.terminfo", 0x55b600a2b5a0) = -1 ENOENT (No such file or directory)
stat("/etc/terminfo", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/usr/share/terminfo", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
access("/etc/terminfo/x/xterm-256color", R_OK) = -1 ENOENT (No such file or directory)
access("/usr/share/terminfo/x/xterm-256color", R_OK) = 0
openat(AT_FDCWD, "/usr/share/terminfo/x/xterm-256color", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=3808, ...}) = 0
read(3, "\36\2%\0&\0\17\0\235\0010\6xterm-256color|xterm"..., 32768) = 3808
read(3, "", 28672)                      = 0
close(3)                                = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TIOCGWINSZ, {ws_row=43, ws_col=173, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(4, TIOCGWINSZ, {ws_row=43, ws_col=173, ws_xpixel=0, ws_ypixel=0}) = 0
writev(2, [{iov_base="double free or corruption (!prev"..., iov_len=33}, {iov_base="\n", iov_len=1}], 2) = 34
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f376a2e3000
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[RTMIN RT_1], [], 8) = 0
getpid()                                = 4029
gettid()                                = 4029
tgkill(4029, 4029, SIGABRT)             = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=4029, si_uid=1000} ---
+++ killed by SIGABRT (core dumped) +++

---

在Ubuntu 20.04、perl版本5.30.0、Wx版本0.9932上运行良好（无崩溃），并从源代码处安装。调试器在

Wx.pm中停止

在Debian 10.4上运行良好，使用perl v5.28.1和Wx 0.9932（作为默认二进制软件包安装）。

stat("/usr/lib64/perl5/vendor_perl/auto/Term/ReadLine/Gnu/XS/autosplit.ix", {st_mode=S_IFREG|0644, st_size=1137, ...}) = 0
openat(AT_FDCWD, "/usr/lib64/perl5/vendor_perl/auto/Term/ReadLine/Gnu/XS/autosplit.ix", O_RDONLY|O_CLOEXEC) = 13
ioctl(13, TCGETS, 0x7ffe8bf62e00)       = -1 ENOTTY (Inappropriate ioctl for device)
lseek(13, 0, SEEK_CUR)                  = 0
read(13, "# Index created by AutoSplit for"..., 8192) = 1137
read(13, "", 8192)                      = 0
close(13)                               = 0
lseek(3, 2189, SEEK_SET)                = 2189
lseek(3, 0, SEEK_CUR)                   = 2189
close(3)                                = 0
getuid()                                = 1000
geteuid()                               = 1000
getgid()                                = 1000
getegid()                               = 1000
fcntl(4, F_GETFL)                       = 0x8002 (flags O_RDWR|O_LARGEFILE)
fcntl(5, F_GETFL)                       = 0x8002 (flags O_RDWR|O_LARGEFILE)
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
stat("/home/bernhard/.terminfo", 0x55b600a2b5a0) = -1 ENOENT (No such file or directory)
stat("/etc/terminfo", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/usr/share/terminfo", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
access("/etc/terminfo/x/xterm-256color", R_OK) = -1 ENOENT (No such file or directory)
access("/usr/share/terminfo/x/xterm-256color", R_OK) = 0
openat(AT_FDCWD, "/usr/share/terminfo/x/xterm-256color", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=3808, ...}) = 0
read(3, "\36\2%\0&\0\17\0\235\0010\6xterm-256color|xterm"..., 32768) = 3808
read(3, "", 28672)                      = 0
close(3)                                = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TIOCGWINSZ, {ws_row=43, ws_col=173, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(4, TIOCGWINSZ, {ws_row=43, ws_col=173, ws_xpixel=0, ws_ypixel=0}) = 0
writev(2, [{iov_base="double free or corruption (!prev"..., iov_len=33}, {iov_base="\n", iov_len=1}], 2) = 34
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f376a2e3000
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[RTMIN RT_1], [], 8) = 0
getpid()                                = 4029
gettid()                                = 4029
tgkill(4029, 4029, SIGABRT)             = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=4029, si_uid=1000} ---
+++ killed by SIGABRT (core dumped) +++