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Bug#583300: marked as done (ocamlopt x86_64: Stack_overflow not always generated properly)



Your message dated Thu, 23 Oct 2014 16:09:35 +0300
with message-id <5448FE0F.80500@etorok.net>
and subject line Done: ocamlopt x86_64: Stack_overflow not always generated properly
has caused the Debian Bug report #583300,
regarding ocamlopt x86_64: Stack_overflow not always generated properly
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
583300: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=583300
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Package: menhir
Version: 20090505.dfsg-2+b1
Severity: normal

Running this command segfaults menhir:

$ echo 'EOF' | menhir --interpret foo.mly
Segmentation fault

It doesn't always segfault, running it a couple more times, sometimes I get this OCaml error:
$ echo EOF | menhir --interpret foo.mly
Fatal error: exception Stack_overflow

valgrind says:
==28472== Stack overflow in thread 1: can't grow stack to 0x7fe801ff8
==28472== Stack overflow in thread 1: can't grow stack to 0x7fe801ff0
==28472== 
==28472== Process terminating with default action of signal 11 (SIGSEGV)
==28472==  Access not within mapped region at address 0x7FE801FF0
==28472==    at 0x4B8CC8: ??? (in /usr/bin/menhir)

So it looks like the stack overflow is not always caught properly by OCaml, and
instead causes menhir to segfault.
Of course 'menhir' should stack overflow in the first place (if there is
something wrong with the grammar it should show an error message).

Here is foo.mly:
$ cat >foo.mly <<EOF
%token SEMICOLON
%token EOF
%start <unit> main
%%

main:
| SEMICOLON EOF { }
| error SEMICOLON { }
EOF

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.34-rc5-00118-gf259493 (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages menhir depends on:
ii  libc6                         2.10.2-9   Embedded GNU C Library: Shared lib

menhir recommends no packages.

menhir suggests no packages.

-- no debconf information



--- End Message ---
--- Begin Message ---
Package: ocaml
Version: 4.01.0-4

--- Please enter the report below this line. ---

This bug was fixed upstream, and I confirm that I get Stack_overflow properly now with the version in Debian.

--- End Message ---

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