Assertion failure in toke.c

[p5pRT]

Migrated from rt.perl.org#1123 (status was 'resolved')

Searchable as RT1123$

[p5pRT]

From ian@dial.pipex.com

perl -e "@​a'"
Assertion failed​: file "toke.c", line 158 at -e line 1.

Same effect using [$%*] instead of @​. Same under 5.00404, 5.00558

(BTW Isn't it about time to deprecate $a'a ?)

Perl Info

This perlbug was built using Perl 5.00404 - Sun Apr 26 12:56:41 BST 1998
It is being executed now by  Perl 5.00558 - Thu Jul 29 22:26:37 BST 1999.

Site configuration information for perl 5.00404:

Configured by ian at Sun Apr 26 12:56:41 BST 1998.

Summary of my perl5 (5.0 patchlevel 4 subversion 4) configuration:
  Platform:
    osname=linux, osvers=2.0.0, archname=i586-linux
    uname='linux penstock 2.0.0 #1 mon jan 20 15:07:14 gmt 1997 i586 '
    hint=previous, useposix=true, d_sigaction=define
    bincompat3=n useperlio=undef d_sfio=undef
  Compiler:
    cc='cc', optimize='-O2', gccversion=2.7.2
    cppflags='-Dbool=char -DHAS_BOOL -I/usr/local/include'
    ccflags ='-Dbool=char -DHAS_BOOL -I/usr/local/include'
    stdchar='char', d_stdstdio=define, usevfork=false
    voidflags=15, castflags=0, d_casti32=define, d_castneg=define
    intsize=4, alignbytes=4, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lgdbm -ldb -ldl -lm -lc
    libc=/lib/libc.so.5.3.12, so=so
    useshrplib=false, libperl=libperl.a
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
    cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'

Locally applied patches:
    


@INC for perl 5.00404:
    /u2/ian/lib/perl5
    /usr/local/lib/perl5/i586-linux/5.00404
    /usr/local/lib/perl5
    /usr/local/lib/perl5/site_perl/i586-linux
    /usr/local/lib/perl5/site_perl
    .


Environment for perl 5.00404:
    HOME=/u2/ian
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/u2/ian/cmd:/u2/ian/Linux:/usr/local/bin:/u2/ian/stocks/cmd:/usr/openwin/bin:/usr/bin/X11:/usr/bin:/bin:/usr/lib/teTeX/bin:/usr/etc:/sbin:/usr/sbin
    PERL5LIB=/u2/ian/lib/perl5
    PERL_BADLANG (unset)
    SHELL=/bin/zsh

[p5pRT]

From @gsar

On Sun, 01 Aug 1999 00​:45​:16 BST, Ian Phillipps wrote​:

perl -e "@​a'"
Assertion failed​: file "toke.c", line 158 at -e line 1.

Same effect using [$%*] instead of @​. Same under 5.00404, 5.00558

(BTW Isn't it about time to deprecate $a'a ?)

Do not underestimate the vast stillness of Perl4 that lies
festering in the far reaches of the planet!

Sarathy
gsar@​activestate.com

Inline Patch

-----------------------------------8<-----------------------------------
Change 4133 by gsar@auger on 1999/09/13 03:25:43

	avoid assertion failure on C<@a'>

Affected files ...

... //depot/perl/toke.c#148 edit

Differences ...

==== //depot/perl/toke.c#148 (text) ====
Index: perl/toke.c
--- perl/toke.c.~1~	Sun Sep 12 20:25:47 1999
+++ perl/toke.c	Sun Sep 12 20:25:47 1999
@@ -213,8 +213,12 @@
     char *oldbp = PL_bufptr;
     bool is_first = (PL_oldbufptr == PL_linestart);
 
-    assert(s >= oldbp);
-    PL_bufptr = s;
+    if (!s)
+	s = oldbp;
+    else {
+	assert(s >= oldbp);
+	PL_bufptr = s;
+    }
     yywarn(Perl_form(aTHX_ "%s found where operator expected", what));
     if (is_first)
 	Perl_warn(aTHX_ "\t(Missing semicolon on previous line?)\n");
End of Patch.