Description:
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I'm trying to install ds version 1.2.7 I'm getting the following error:

$ pecl -v install -f ds-1.2.7
Package "ds" Version "1.2.7" does not have REST xml available
Cannot initialize 'channel://pecl.php.net/ds-1.2.7', invalid or missing package file
Package "channel://pecl.php.net/ds-1.2.7" is not valid
install failed

It seems that this is due to https://pecl.php.net/rest/r/ds/1.2.7.xml returning "404 Not Found". PEAR internally reports:

File https://pecl.php.net:443/rest/r/ds/1.2.7.xml not valid (received: HTTP/1.1 404 Not Found)

Other versions of ds extension seem to have a proper XML file and can be installed without a problem.

Test script:
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pecl install -f ds-1.2.7

Expected result:
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PECL installs the ds extension in 1.2.7 version.

Actual result:
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$ pecl install -f ds-1.2.7
Package "ds" Version "1.2.7" does not have REST xml available
install failed