14c7757e9b
Occasionally I've been seeing failures with the multi-line diagnostics. It's never been clear what's causing the spurious failures, though I have long suspected a greedy regexp match. It happened again yesterday with a local change that in no way should affect diagnostics, so I finally went searching and found that sure enough the multi-line diagnostics had a ".*" in their regexp. According to the comments, the .* is primarily to catch any dg directives that may appear -- ie it should eat to EOL, but not multiple lines. But a .* can indeed match a newline and cause it to eat multiple lines. The fix is simple. [^\r\n]* will eat to EOL, but not further. Regression tested on x86_64 and on our internal target. gcc/testsuite * lib/multiline.exp (_build_multiline_regex): Use a better regexp than .* to match up to EOL.
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