#11380: Compiling a 10.000 line file exhausts memory -------------------------------------+------------------------------------- Reporter: kennethb | Owner: Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 Type of failure: Compile-time | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by thomie): * failure: Compile-time crash => Compile-time performance bug Comment: Compiling (instead of interpreting) the generated Parser.hs with ghc-7.10.3 (wihout optimizations) doesn't complete either, when only 3GB of RAM is available (tested with `ulimit -v 3000000`). The problems seem to begin in the desugaring phase: {{{ *** Parser: *** Renamer/typechecker: *** Desugar: ghc: out of memory (requested 2097152 bytes) }}} The generated parser is huge (10.000 lines). But it is about the same size as GHC's own parser, which GHC //is// able to compile with reasonable memory. I tried making the Parser smaller a bit, but didn't find any obvious rule that might be triggering the problem. Could you try with other version of GHC (say 7.8.4 and 8.0.1)? Is it a regression, or maybe already fixed? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11380#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler