Bug 1377020 - Damangler error when debugging WebKit
Summary: Damangler error when debugging WebKit
Keywords:
Status: CLOSED DUPLICATE of bug 1367131
Alias: None
Product: Fedora
Classification: Fedora
Component: gdb
Version: 24
Hardware: x86_64
OS: Linux
unspecified
low
Target Milestone: ---
Assignee: Jan Kratochvil
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-09-17 15:07 UTC by Michael Catanzaro
Modified: 2016-09-18 22:26 UTC (History)
6 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2016-09-18 22:26:12 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
GNU Compiler Collection 72822 0 None None None 2016-09-18 22:26:12 UTC
WebKit Project 159919 0 None None None 2016-09-17 15:09:09 UTC

Description Michael Catanzaro 2016-09-17 15:07:27 UTC 
Description of problem: Demangler error when debugging any program that uses WebKit trunk


Version-Release number of selected component (if applicable): gdb-7.11.1-75.fc24


How reproducible: Always


Steps to Reproduce:
1. Build WebKit from trunk (sorry :S it's terrible but that's my reproducer)
2. gdb epiphany

Maybe the bug will occur with F25's WebKit, that would be a way easier reproducer. But I haven't tested with F25 yet. Since this is a demangler error, I'm hoping the bug report will be useful anyway.

Actual results:

../../gdb/cp-support.c:1595: demangler-warning: unable to demangle '_ZSt7forwardIRZN6WebKit29NetworkConnectionToWebProcess26writeBlobsToTemporaryFilesERKN3WTF6VectorINS2_6StringELm0ENS2_15CrashOnOverflowELm16EEEmEUlRT_E_EOS9_RNSt16remove_referenceIS9_E4typeE' (demangler failed with signal 11)
Unable to dump core, use `ulimit -c unlimited' before executing GDB next time.
Missing separate debuginfos, use: dnf debuginfo-install avahi-gobject-0.6.32-4.fc24.x86_64 avahi-libs-0.6.32-4.fc24.x86_64 sqlite-libs-3.13.0-1.fc24.x86_64
../../gdb/cp-support.c:1608: demangler-warning: unable to demangle '_ZSt7forwardIRZN6WebKit29NetworkConnectionToWebProcess26writeBlobsToTemporaryFilesERKN3WTF6VectorINS2_6StringELm0ENS2_15CrashOnOverflowELm16EEEmEUlRT_E_EOS9_RNSt16remove_referenceIS9_E4typeE' (demangler failed with signal 11)
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) n

This is a bug, please report it.  For instructions, see:
<http://www.gnu.org/software/gdb/bugs/>.



Expected results: No demangler error


Additional info:
Comment 1 Michael Catanzaro 2016-09-17 15:10:55 UTC 
Ah, here's a much better reproducer (from the upstream bug):

echo '_ZSt7forwardIRZZN6WebKit29NetworkConnectionToWebProcess26writeBlobsToTemporaryFilesERKN3WTF6VectorINS2_6StringELm0ENS2_15CrashOnOverflowELm16EEEmENUlRT_E_clIS7_EEDaSA_EUlvE_EOS9_RNSt16remove_referenceIS9_E4typeE' | c++filt
Comment 2 Jan Kratochvil 2016-09-18 22:26:12 UTC 
All Bug duplicates to be verified after the upstream GCC Bug gets fixed.

*** This bug has been marked as a duplicate of bug 1367131 ***
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