gccrs: Fix missing error diag on const parser and crash in typecheck - #4781
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We need to force braces on the default expression in the parser but also the typecheck cant const eval when the typecheck fails otherwise it will crash because invalid error mark node. Fixes #4173 gcc/rust/ChangeLog: * parse/rust-parse-impl.hxx: * typecheck/rust-hir-type-check-base.cc: gcc/testsuite/ChangeLog: * rust/compile/issue-4173-1.rs: New test. * rust/compile/issue-4173-2.rs: New test. * rust/compile/issue-4173-3.rs: New test. Signed-off-by: Philip Herron <herron.philip@googlemail.com>
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We need to force braces on the default expression in the parser but also the typecheck cant const eval when the typecheck fails otherwise it will crash because invalid error mark node.
Fixes #4173
gcc/rust/ChangeLog:
gcc/testsuite/ChangeLog: