Bug 487766
| Summary: | gawk 3.1.3 causes unexpected (empty) results with a certain expression (see full bug) | ||||||
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| Product: | Red Hat Enterprise Linux 4 | Reporter: | Dan McDougall <riskable> | ||||
| Component: | gawk | Assignee: | Jan Zeleny <jzeleny> | ||||
| Status: | CLOSED NEXTRELEASE | QA Contact: | BaseOS QE <qe-baseos-auto> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | low | ||||||
| Version: | 4.6 | CC: | rvokal, tao, vanhoof | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2010-03-18 13:20:19 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Created attachment 333528 [details]
Text that the gawk expression fails on
gawk 3.1.3 (RHEL 4) fails to parse this text using the following expression:
gawk '{if ($2 == "1") if ($3 ~ /\w+@\w+/) print tolower($1)":"tolower($3)}' <attached example>
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User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.6) Gecko/2009011913 Firefox/3.0.6 I have no idea what is causing this bug but it appears to have presented itself in gawk 3.1.2, was still around in gawk 3.1.3, and was fixed in 3.1.4. I figured this out by compiling all the aforementioned versions by hand. Here's the expression that fails: gawk '{if ($2 == "1") if ($3 ~ /\w+@\w+/) print tolower($1)":"tolower($3)}' The text that it fails on (also attached): RIA4395 1 RIA4395.com ark Smith, Robert The workaround for now was to just install gawk-3.1.6 from sources but hopefully a fix can be backported before RHEL 4 is EOL'd. Reproducible: Always Steps to Reproduce: echo "RIA4395 1 RIA4395.com ark Smith, Robert" | \ gawk '{if ($2 == "1") if ($3 ~ /\w+@\w+/) print tolower($1)":"tolower($3)}' ...or if that didn't format properly: gawk '{if ($2 == "1") if ($3 ~ /\w+@\w+/) print tolower($1)":"tolower($3)}' <attached text> Actual Results: $ (an empty shell of a prompt) Expected Results: ria4395:ria4395.com