[scintilla:bugs] #1978 Shifting signed 32-bit value by 31 bits is undefined behaviour

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Zufu Liu

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Oct 14, 2017, 12:34:30 PM10/14/17
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[bugs:#1978] Shifting signed 32-bit value by 31 bits is undefined behaviour

Status: open
Group: Bug
Created: Sat Oct 14, 2017 04:34 PM UTC by Zufu Liu
Last Updated: Sat Oct 14, 2017 04:34 PM UTC
Owner: nobody

CppCheck 1.81 warnings:
Shifting signed 32-bit value by 31 bits is undefined behaviour.

for ViewStyle.cxx line 195:

const int maskBit = 1 << markBit;

a quick fix would be:

const int maskBit = 1U << markBit;

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Neil Hodgson

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Oct 14, 2017, 6:07:32 PM10/14/17
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  • labels: --> scintilla
  • status: open --> open-fixed
  • assigned_to: Neil Hodgson
  • Comment:

Committed as [2db052].

[bugs:#1978] Shifting signed 32-bit value by 31 bits is undefined behaviour

Status: open-fixed
Group: Bug
Labels: scintilla

Created: Sat Oct 14, 2017 04:34 PM UTC by Zufu Liu
Last Updated: Sat Oct 14, 2017 04:34 PM UTC

Owner: Neil Hodgson

Neil Hodgson

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Oct 25, 2017, 5:24:43 PM10/25/17
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  • status: open-fixed --> closed-fixed

[bugs:#1978] Shifting signed 32-bit value by 31 bits is undefined behaviour

Status: closed-fixed
Group: Bug
Labels: scintilla

Created: Sat Oct 14, 2017 04:34 PM UTC by Zufu Liu

Last Updated: Sat Oct 14, 2017 10:07 PM UTC
Owner: Neil Hodgson

CppCheck 1.81 warnings:


Shifting signed 32-bit value by 31 bits is undefined behaviour.

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