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The gcc.dg/noncompile/pr79758.c testcase prints pr79758.c:5:6: error: redefinition of 'fn1' 'error_mark' not supported by direct_abstract_declarator)'/home/rguenther/src/gcc3/gcc/testsuite/gcc.dg/noncompile/pr79758.c:4:6: note: previous definition of 'fn1' with type which shows a) re-entry of pp_printf via pp_unsupported_tree and b) a bogus diagnostic. The following handles ERROR_MARK in direct_abstract_declarator, yielding in the better /home/rguenther/src/gcc3/gcc/testsuite/gcc.dg/noncompile/pr79758.c:5:6: error: redefinition of 'fn1' /home/rguenther/src/gcc3/gcc/testsuite/gcc.dg/noncompile/pr79758.c:4:6: note: previous definition of 'fn1' with type 'void(<type-error>)' but still maybe not perfect. 2021-03-04 Richard Biener <rguenther@suse.de> gcc/c-family/ * c-pretty-print.c (c_pretty_printer::direct_abstract_declarator): Handle ERROR_MARK.
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