gulp-imagemin-issue183
Minimal demonstration of gulp-imagemin issue #183, which affected v3.0.1 of that module.
See how the input directory contains 13 SVG files, the 7th of which is deliberately malformed. When we run the minimal Gulp task,
$ npm start
[17:14:19] Using gulpfile ~\git\gulp-imagemin-issue183\gulpfile.js
[17:14:19] Starting 'clean'...
[17:14:19] Finished 'clean' after 6.42 ms
[17:14:19] Starting 'default'...
$ echo $?
0
$ ls output
button1.svg button2.svg button3.svg button4.svg button5.svg button6.svg
An error occurred while processing button7_broken.svg, and the 8th through 13th images were not processed.
However, the error which occurred was apparently swallowed, and the task has seemingly completed successfully and returned 0.
Afterword
This issue was fixed with PR #199 and is resolved in gulp-imagemin v3.0.2.