[cfe-commits] [PATCH] PR9488: don't assert/crash if auto type substitution fails

[Richard Smith]

Hi,

In PR9488 I observed that clang crashes if auto type substitution fails.
This can happen if 'auto' is deduced as 'void' in the context of an 'auto
&' type. Testing the fix for this issue exposed another issue: the type
source information for the substituted type was not being built.

The attached patch fixes these issues. Please review!

Thanks,
Richard
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