perl -Mv5.40 -MDevel::Peek -E'for my $i ("4" .. "5") { Dump builtin::trim($i); Dump 0+builtin::trim($i) }'

SV = PV(0xd61dbc0) at 0xd65ba58  REFCNT = 1  FLAGS = (PADTMP,POK,pPOK)  PV = 0xd5cce70 "4"\0  CUR = 1  LEN = 16SV = IV(0xd65b970) at 0xd65b980  REFCNT = 1  FLAGS = (PADTMP,IOK,pIOK)  IV = 4SV = PV(0xd61dbc0) at 0xd65ba58  REFCNT = 1  FLAGS = (PADTMP,POK,pPOK)  PV = 0xd5cce70 "5"\0  CUR = 1  LEN = 16SV = IV(0xd65b970) at 0xd65b980  REFCNT = 1  FLAGS = (PADTMP,IOK,pIOK)  IV = 4

Summary of my perl5 (revision 5 version 40 subversion 0) configuration:     Platform:    osname=linux    osvers=6.3.8-200.fc38.x86_64    archname=x86_64-linux    uname='linux home.grinnz.com 6.3.8-200.fc38.x86_64 #1 smp preempt_dynamic thu jun 15 02:15:40 utc 2023 x86_64 gnulinux '    config_args='-Dprefix=/home/grinnz/.plenv/versions/5.40.0 -de -Dversiononly -A'eval:scriptdir=/home/grinnz/.plenv/versions/5.40.0/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 ='-fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2'    optimize='-O2'    cppflags='-fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include'    ccversion=''    gccversion='13.2.1 20231011 (Red Hat 13.2.1-4)'    gccosandvers=''    intsize=4    longsize=8    ptrsize=8    doublesize=8    byteorder=12345678    doublekind=3    d_longlong=define    longlongsize=8    d_longdbl=define    longdblsize=16    longdblkind=3    ivtype='long'    ivsize=8    nvtype='double'    nvsize=8    Off_t='off_t'    lseeksize=8    alignbytes=8    prototype=define  Linker and Libraries:    ld='cc'    ldflags =' -fstack-protector-strong -L/usr/local/lib'    libpth=/usr/local/lib /usr/lib /usr/lib64 /usr/local/lib64    libs=-lpthread -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc -lgdbm_compat    perllibs=-lpthread -ldl -lm -lcrypt -lutil -lc    libc=/lib/../lib64/libc.so.6    so=so    useshrplib=false    libperl=libperl.a    gnulibc_version='2.37'  Dynamic Linking:    dlsrc=dl_dlopen.xs    dlext=so    d_dlsymun=undef    ccdlflags='-Wl,-E'    cccdlflags='-fPIC'    lddlflags='-shared -O2 -L/usr/local/lib -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 linux  Compiled at Jun 10 2024 21:21:12  @INC:    /home/grinnz/.plenv/versions/5.40.0/lib/perl5/site_perl/5.40.0/x86_64-linux    /home/grinnz/.plenv/versions/5.40.0/lib/perl5/site_perl/5.40.0    /home/grinnz/.plenv/versions/5.40.0/lib/perl5/5.40.0/x86_64-linux    /home/grinnz/.plenv/versions/5.40.0/lib/perl5/5.40.0