0005704: cmx magic numbers have not been changed for a while

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Date Submitted

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0005704

OCaml

OCaml backend (code generation)

public

2012-07-28 14:03

2012-09-24 13:50

Reporter

lefessan

Assigned To

Priority

normal

Severity

trivial

Reproducibility

have not tried

Status

confirmed

Resolution

open

Platform

OS Version

Product Version

4.00.0

Target Version

4.01.0+dev

Fixed in Version

Summary

0005704: cmx magic numbers have not been changed for a while

Description

It looks like cmx magic numbers have not been changed since commit 7812, but last changes to the Clambda.ulambda (used for inlined function code in .cmx) have commit numbers 11007 and 12179.

Some people have noticed segfaults of ocamlopt/ocamlopt.opt due to heap corruption. Is it possible that these segfaults come from .cmx files of older versions ? (I open this bug report so that such problems can be linked to this bug report as a possible cause)

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Notes
(0008154) xleroy (administrator) 2012-09-24 13:50	I agree that updating the magic numbers wouldn't hurt. On the other hand, I don't think magic number confusion is causing the heap corruption in question --- PR#5757 looks like a more likely culprit. So, I propose to schedule this update for 4.01 and leave it out of the bugfix release 4.00.1.

Issue History
Date Modified	Username	Field	Change
2012-07-28 14:03	lefessan	New Issue
2012-07-31 13:31	doligez	Status	new => confirmed
2012-09-24 13:50	xleroy	Note Added: 0008154
2012-09-24 13:50	xleroy	Priority	urgent => normal
2012-09-24 13:50	xleroy	Target Version	4.00.1+dev => 4.01.0+dev