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The problem here is that we create a function type which has an error_mark_node as one of the function arguments which confuse the gimplifier. The fix is simple, we should just have a variable length function which solves this issue and allows for the middle-end to work without any more problems. OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions. Thanks, Andrew Pinski ChangeLog: * c-decl.c (grokparms): Set arg_types to NULL_TREE if there was an error. * gcc.dg/pr43211.c: New test. * gcc.dg/pr18809-1.c: Don't expect an error when calling foo.
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fixpr43211.diff.txt
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