Bug #58257 mysqltest: in if(), ! $var with space is always false

• Submitted: 17 Nov 2010 14:27
• Modified: 7 Dec 2010 12:53
• Reporter: Bjørn Munch
• Status: Closed
• Category: Tools: MTR / mysql-test-run
• Severity: S3 (Non-critical)
• Version: 5.1+
• OS: Any
• Assigned to: Bjørn Munch
• CPU Architecture: Any

[17 Nov 2010 14:27] Bjørn Munch

Description:
When writing if() in tests, it's natural to expect this to work:

if (! $some_variable) {
  # do stuff;
}

But it turns out this test is always false no matter the value of $some_variable. Without space, it works correctly.

How to repeat:
Run this test without a result file:

let $var= 0;
if (! $var) {
  echo BOO;
}

It will fail as not having produced any output, but it should have written BOO and will if you remove the space in the if expression.

[17 Nov 2010 15:07] Bugs System

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/124166

2951 Bjorn Munch	2010-11-17
      Bug #58257 mysqltest: in if(), ! $var with space is always false
      Evaluation would start with the space and thus ignore the $
      Added while() to skip past white space

[18 Nov 2010 17:07] Bjørn Munch

Pushed to -mtr trees

[23 Nov 2010 20:34] Paul DuBois

Changes to test suite. No changelog entry needed.

[5 Dec 2010 12:38] Bugs System

Pushed into mysql-trunk 5.6.1 (revid:[e-mail]-20101205122447-6x94l4fmslpbttxj) (version source revid:[e-mail]-20101205122447-6x94l4fmslpbttxj) (merge vers: 5.6.1) (pib:23)

[15 Dec 2010 5:52] Bugs System

Pushed into mysql-5.1 5.1.55 (revid:[e-mail]-20101215054055-vgwki317xg1wphhh) (version source revid:[e-mail]-20101215054055-vgwki317xg1wphhh) (merge vers: 5.1.55) (pib:23)

[16 Dec 2010 22:26] Bugs System

Pushed into mysql-5.5 5.5.9 (revid:[e-mail]-20101216101358-fyzr1epq95a3yett) (version source revid:[e-mail]-20101216101358-fyzr1epq95a3yett) (merge vers: 5.5.9) (pib:24)