#13527: ghc has a stack space leak when prints warnings -------------------------------------+------------------------------------- Reporter: slyfox | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Found on a crash when ghc tried to print a warning in a huge assembly file. I've simplified it to autogenerated C file with an error: {{{ # generate 10 million lines file # and put an error into the very end of file $ { for i in `seq 1 $((10 * 1000 * 1000))`; do echo "// a comment number $i"; done; echo 'static int foo = ;'; } > a.c }}} {{{ $ LANG=C powerpc64le-unknown-linux-gnu-ghc -c a.c +RTS -K128M stack overflow: use +RTS -K<size> to increase it }}} C compiler tried to output something like the following to stderr: {{{ a.c:10000001:0: error: error: expected expression before ';' token static int foo = ; }}} GHC finds 'a.c:10000001' location and tries to pretty-print the line. We get a space leak somewhere. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13527 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler