[NSIS-Bugs] [ nsis-Bugs-1718172 ] Relative jump past macro can give "Invalid Opcode" error

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Bugs item #1718172, was opened at 2007-05-13 08:00
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Relative jump past macro can give "Invalid Opcode" error

Initial Comment:
This bug has been present in the past few versions, and is still there in 2.27.

A relative jump past a macro can give a corrupted installer which terminates abruptly with an error message, for instance

  Goto +2
  ${WordFind} ...

Error message popup:

  "Installer corrupted: invalid opcode"

To reproduce the error, simply compile and run the following sample script, also attached as a file.

Since reproduction is straight-forward and I don't know if the email address might show up on the web somewhere, I don't include any contact details.

---

!include "WordFunc.nsh"
!insertmacro WordFind

outfile "ErrorInvalidOpcode.exe"

Section

  ; +2 intending goto DetailPrint line
  ; Actually ends up somewhere inside WordFind
  Goto +2
  ${WordFind} "" "" "1" $R0
  DetailPrint "ok";

SectionEnd


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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=373085&aid=1718172&group_id=22049