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diagnostics: fix invalid error message indentation

Browse Source 
https://lists.gnu.org/archive/html/bison-patches/2019-08/msg00007.html

When Bison is started with a flag that suppresses warning messages, the
error_message() function can produce a few gigabytes of indentation
because of a dangling pointer.

* src/complain.c (error_message): Don't reset indent_ptr here, but...
(complain_indent): here.
* tests/diagnostics.at (Indentation with message suppression): Check
this case.
This commit is contained in:
László Várady
2019-08-09 14:24:14 +02:00
committed by Akim Demaille
parent d7cf3f5b18
commit 9145bd0b61
4 changed files with 35 additions and 1 deletions
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30
tests/diagnostics.at
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@@ -242,3 +242,33 @@ input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option
m4_popdef([AT_TEST])
## -------------------------------------- ##
## Indentation with message suppression. ##
## -------------------------------------- ##
AT_SETUP([[Indentation with message suppression]])
# https://lists.gnu.org/archive/html/bug-bison/2019-08/msg00002.html
AT_DATA([[input.y]],
[[%define api.pure
%pure-parser
%error-verbose
%%
exp : '0'
]])
AT_BISON_CHECK([[-fcaret -Wno-other input.y]], [0], [],
[[input.y:2.1-12: warning: deprecated directive, use '%define api.pure' [-Wdeprecated]
2 | %pure-parser
| ^~~~~~~~~~~~
input.y:3.1-14: warning: deprecated directive, use '%define parse.error verbose' [-Wdeprecated]
3 | %error-verbose
| ^~~~~~~~~~~~~~
]])
AT_CLEANUP