From 813476bf7291dfaf9fc0ef77c9f53a07258a3801 Mon Sep 17 00:00:00 2001 From: Sean Dewar Date: Tue, 30 Aug 2022 23:13:52 +0100 Subject: fix(exceptions): restore `did_throw` (#20000) `!did_throw` doesn't exactly imply `!current_exception`, as `did_throw = false` is sometimes used to defer exception handling for later (without forgetting the exception). E.g: uncaught exception handling in `do_cmdline()` may be deferred to a different call (e.g: when `try_level > 0`). In #7881, `current_exception = NULL` in `do_cmdline()` is used as an analogue of `did_throw = false`, but also causes the pending exception to be lost, which also leaks as `discard_exception()` wasn't used. It may be possible to fix this by saving/restoring `current_exception`, but handling all of `did_throw`'s edge cases seems messier. Maybe not worth diverging over. This fix also uncovers a `man_spec.lua` bug on Windows: exceptions are thrown due to Windows missing `man`, but they're lost; skip these tests if `man` isn't executable. --- src/nvim/api/private/helpers.c | 8 ++++++-- src/nvim/api/private/helpers.h | 1 + src/nvim/api/vimscript.c | 4 ++-- 3 files changed, 9 insertions(+), 4 deletions(-) (limited to 'src/nvim/api') diff --git a/src/nvim/api/private/helpers.c b/src/nvim/api/private/helpers.c index e35c58bf1b..ebcf6cca6d 100644 --- a/src/nvim/api/private/helpers.c +++ b/src/nvim/api/private/helpers.c @@ -58,6 +58,7 @@ void try_enter(TryState *const tstate) .private_msg_list = NULL, .trylevel = trylevel, .got_int = got_int, + .did_throw = did_throw, .need_rethrow = need_rethrow, .did_emsg = did_emsg, }; @@ -65,6 +66,7 @@ void try_enter(TryState *const tstate) current_exception = NULL; trylevel = 1; got_int = false; + did_throw = false; need_rethrow = false; did_emsg = false; } @@ -85,6 +87,7 @@ bool try_leave(const TryState *const tstate, Error *const err) assert(trylevel == 0); assert(!need_rethrow); assert(!got_int); + assert(!did_throw); assert(!did_emsg); assert(msg_list == &tstate->private_msg_list); assert(*msg_list == NULL); @@ -93,6 +96,7 @@ bool try_leave(const TryState *const tstate, Error *const err) current_exception = tstate->current_exception; trylevel = tstate->trylevel; got_int = tstate->got_int; + did_throw = tstate->did_throw; need_rethrow = tstate->need_rethrow; did_emsg = tstate->did_emsg; return ret; @@ -127,7 +131,7 @@ bool try_end(Error *err) force_abort = false; if (got_int) { - if (current_exception) { + if (did_throw) { // If we got an interrupt, discard the current exception discard_current_exception(); } @@ -146,7 +150,7 @@ bool try_end(Error *err) if (should_free) { xfree(msg); } - } else if (current_exception) { + } else if (did_throw) { api_set_error(err, kErrorTypeException, "%s", current_exception->value); discard_current_exception(); } diff --git a/src/nvim/api/private/helpers.h b/src/nvim/api/private/helpers.h index 4608554448..2157ad0ec2 100644 --- a/src/nvim/api/private/helpers.h +++ b/src/nvim/api/private/helpers.h @@ -134,6 +134,7 @@ typedef struct { const msglist_T *const *msg_list; int trylevel; int got_int; + bool did_throw; int need_rethrow; int did_emsg; } TryState; diff --git a/src/nvim/api/vimscript.c b/src/nvim/api/vimscript.c index a28bfd2ab9..f6d0e39327 100644 --- a/src/nvim/api/vimscript.c +++ b/src/nvim/api/vimscript.c @@ -137,7 +137,7 @@ Object nvim_eval(String expr, Error *err) if (!recursive) { force_abort = false; suppress_errthrow = false; - current_exception = NULL; + did_throw = false; // `did_emsg` is set by emsg(), which cancels execution. did_emsg = false; } @@ -196,7 +196,7 @@ static Object _call_function(String fn, Array args, dict_T *self, Error *err) if (!recursive) { force_abort = false; suppress_errthrow = false; - current_exception = NULL; + did_throw = false; // `did_emsg` is set by emsg(), which cancels execution. did_emsg = false; } -- cgit