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Showing content from https://github.com/Perl/perl5/issues/21350 below:

"floating point" line numbers · Issue #21350 · Perl/perl5 · GitHub

Module: perl5db.pl

Description

Accidentally entering a line range with one or more periods on a list command causes the debugger to produce anomalous line numbers

Steps to Reproduce

1. perl -d any script.
2. At the debugger prompt, enter l 1.10.
3. The debugger will list line 1 with the line number 1.10.
4. Enter a bare l command.
5. The debugger will list lines 2 to 11 as 2.10, 3.10,...11.10.
6. if you enter l 1.2.3, the debugger will list line 1 as line 1.2.3.
7. A subsequent list command will list lines as 2.2, 2.3,...
8. Entering l 127.0.0.1 will list line 127 as 127.0.0.1 ....
9. Subsequent l commands will not show decimal points, so the logic is detecting that floating point numbers with no decimals can be displayed as integers

Expected behavior

The debugger should either reject numbers containing periods on a list command; automatically truncate them to integers (probably the best option); or interpret the first . as a comma, then truncate anything after a second ., and print the resulting range of lines.

Perl configuration

# perl -V output goes here
Summary of my perl5 (revision 5 version 38 subversion 0) configuration:
   
  Platform:
    osname=darwin
    osvers=22.6.0
    archname=darwin-2level
    uname='darwin tekili-li.local 22.6.0 darwin kernel version 22.6.0: wed jul 5 22:22:05 pdt 2023; root:xnu-8796.141.3~6release_arm64_t6000 arm64 '
    config_args='-de -Dprefix=/Users/joemcmahon/perl5/perlbrew/perls/perl-5.38.0 -Aeval:scriptdir=/Users/joemcmahon/perl5/perlbrew/perls/perl-5.38.0/bin'
    hint=recommended
    useposix=true
    d_sigaction=define
    useithreads=undef
    usemultiplicity=undef
    use64bitint=define
    use64bitall=define
    uselongdouble=undef
    usemymalloc=n
    default_inc_excludes_dot=define
  Compiler:
    cc='cc'
    ccflags ='-fno-common -DPERL_DARWIN -mmacosx-version-min=13.5 -DNO_POSIX_2008_LOCALE -fno-strict-aliasing -pipe -fstack-protector-strong'
    optimize='-O3'
    cppflags='-fno-common -DPERL_DARWIN -mmacosx-version-min=13.5 -DNO_POSIX_2008_LOCALE -fno-strict-aliasing -pipe -fstack-protector-strong'
    ccversion=''
    gccversion='Apple LLVM 14.0.3 (clang-1403.0.22.14.1)'
    gccosandvers=''
    intsize=4
    longsize=8
    ptrsize=8
    doublesize=8
    byteorder=12345678
    doublekind=3
    d_longlong=define
    longlongsize=8
    d_longdbl=define
    longdblsize=8
    longdblkind=0
    ivtype='long'
    ivsize=8
    nvtype='double'
    nvsize=8
    Off_t='off_t'
    lseeksize=8
    alignbytes=8
    prototype=define
  Linker and Libraries:
    ld='cc'
    ldflags =' -mmacosx-version-min=13.5 -fstack-protector-strong'
    libpth=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/14.0.3/lib /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib /usr/lib
    libs= 
    perllibs=
    libc=
    so=dylib
    useshrplib=false
    libperl=libperl.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs
    dlext=bundle
    d_dlsymun=undef
    ccdlflags=' '
    cccdlflags=' '
    lddlflags=' -mmacosx-version-min=13.5 -bundle -undefined dynamic_lookup -fstack-protector-strong'


Characteristics of this binary (from libperl): 
  Compile-time options:
    HAS_LONG_DOUBLE
    HAS_STRTOLD
    HAS_TIMES
    PERLIO_LAYERS
    PERL_COPY_ON_WRITE
    PERL_DONT_CREATE_GVSV
    PERL_HASH_FUNC_SIPHASH13
    PERL_HASH_USE_SBOX32
    PERL_MALLOC_WRAP
    PERL_OP_PARENT
    PERL_PRESERVE_IVUV
    PERL_USE_SAFE_PUTENV
    USE_64_BIT_ALL
    USE_64_BIT_INT
    USE_LARGE_FILES
    USE_LOCALE
    USE_LOCALE_COLLATE
    USE_LOCALE_CTYPE
    USE_LOCALE_NUMERIC
    USE_LOCALE_TIME
    USE_PERLIO
    USE_PERL_ATOF
  Built under darwin
  Compiled at Aug  1 2023 20:18:24
  %ENV:
    PERLBREW_HOME="/Users/joemcmahon/.perlbrew"
    PERLBREW_MANPATH="/Users/joemcmahon/perl5/perlbrew/perls/perl-5.38.0/man"
    PERLBREW_PATH="/Users/joemcmahon/perl5/perlbrew/bin:/Users/joemcmahon/perl5/perlbrew/perls/perl-5.38.0/bin"
    PERLBREW_PERL="perl-5.38.0"
    PERLBREW_ROOT="/Users/joemcmahon/perl5/perlbrew"
    PERLBREW_SHELLRC_VERSION="0.97"
    PERLBREW_VERSION="0.97"
  @INC:
    /Users/joemcmahon/perl5/perlbrew/perls/perl-5.38.0/lib/site_perl/5.38.0/darwin-2level
    /Users/joemcmahon/perl5/perlbrew/perls/perl-5.38.0/lib/site_perl/5.38.0
    /Users/joemcmahon/perl5/perlbrew/perls/perl-5.38.0/lib/5.38.0/darwin-2level
    /Users/joemcmahon/perl5/perlbrew/perls/perl-5.38.0/lib/5.38.0

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