Catch more specific exceptions in assume role provider #1515
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To repro, call an aws command with an explicit
--region
anda non-existent profile:
aws ec2 describe-instances --region us-east-1 --profile does-not-exist
The issue was that the assume role provider was catching too general
of an exception so the profile does not exist error was not being
propogated.
There's also a bug in botocore with how we're handling failures
for lazily registered components. This is why we're seeing the
"Unknown component" bug. This will require a separate PR
to botocore.
Before:
After:
cc @kyleknap @mtdowling @rayluo