What is the purpose of failed constructions?

[juanval]

I'm enjoying this new alpha. I love the variety of animals and the social feature (I didn't play Alpha 13).

One of my pawns failed when he tried to build a fueled smithy. Then, a message appeared saying that my colonist failed and this supposes a loss of materials, but my colonist simply regathered the same materials and started again the smithy, this time with success.

Where is the loss of materials? It's perhaps a bug?

[b0rsuk]

Either the message is bugged or the failed construction. I've already reported that bug.