[Bug 1940517] [NEW] Several potential bugs of memory leak

[yuxuan He]

Public bug reported:

Ubuntu version: 18.04
sqlite version:3.22

Hello,I found two apotential bugs in package sqlite3,and the .docx file
in the attachment I uploaded shows the occurrence process of the bugs in
a graphical way.Would you help me check whether the bugs mentioned below
are true? Thank you very much for your patience.

In file sqlite3-3.22.0\tool\lemon.c
In function pathsearch
there is allocation of memory,and in certain way,this memory can not be freed correctly.
The entire graphic description is shown in figure 1 in .docx file.

In file sqlite3\build\shell.c(build is a directory contain files generated by configure)
In function readfile
there is allocation of memory,and in certain way,this memory can not be freed correctly.
The entire graphic description is shown in figure 2 in .docx file.

** Affects: sqlite3 (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "memory_leak.docx"
   https://bugs.launchpad.net/bugs/1940517/+attachment/5519050/+files/memory_leak.docx

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Title:
  Several potential bugs of memory leak

Status in sqlite3 package in Ubuntu:
  New

Bug description:
  Ubuntu version: 18.04
  sqlite version:3.22

  Hello,I found two apotential bugs in package sqlite3,and the .docx
  file in the attachment I uploaded shows the occurrence process of the
  bugs in a graphical way.Would you help me check whether the bugs
  mentioned below are true? Thank you very much for your patience.

  In file sqlite3-3.22.0\tool\lemon.c
  In function pathsearch
  there is allocation of memory,and in certain way,this memory can not be freed correctly.
  The entire graphic description is shown in figure 1 in .docx file.

  In file sqlite3\build\shell.c(build is a directory contain files generated by configure)
  In function readfile
  there is allocation of memory,and in certain way,this memory can not be freed correctly.
  The entire graphic description is shown in figure 2 in .docx file.

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