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MacOS defines 'add_history' with a "wrong" type (it returns 'int'
instead of 'void').
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More common code for 'readline' loaded statically or dynamically (or
not loaded).
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Only local variables, which use registers, need this low limit.
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Lua is not religious about that, but it tries to avoid crashes when
loading binary chunks.
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All-weak tables are not being revisited after being visited during
propagation; if it gets a new metatable after that, the new metatable
may not be marked.
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Check the mode in a separate function (getmode), instead of using
comma expressions inside the 'if' condition.
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Unlike sizes, these constants can be negative, so it encodes those
integers into unsigned integers in a way that keeps small numbers
small.
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No thread started with pcall (instead of resume) can be closed,
because coroutine.close would not respect the expected number of
results from the protected call.
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A call to close itself will close all its to-be-closed variables and
return to the resume that (re)started the coroutine.
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Although the execution of a bad binary chunk can crash the interpreter,
simply loading it should be safe.
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In a constructor, each field generates at least one opcode, and the
number of opcodes is limited by INT_MAX. Therefore, the counters for
number of fields cannot exceed this limit. (The current limit for
items in the hash part of a table has a limit smaller than INT_MAX.
However, as long as there are no overflows, the logic for table
resizing will handle that limit.)
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The check for constructor overflow was considering only fields with
explicit names, ignoring fields with syntax '[exp]=exp'.
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Validity of the preambular global declaration in controled together
with all declarations, when checking variable names.
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A goto cannot jump into the scope of any variable declaration,
including 'global *'. To report the error, it needs a "name" for
the scope it is entering.
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In this format, the attribute applies to all names in the list;
e.g. "global<const> print, require, math".
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Reports errors with "?:?:" (instead of "?:-1:") when there is no debug
information.
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The parser uses "break" as fake label to compile "break" as "goto
break". To avoid producing this string at each use, it keeps it
available in its state.
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In preparation for 'global *', the structure 'expdesc' does not point
to 'actvar.arr' for information about global variables.
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'l_uint32' is enough for unicode codepoints (versus unsigned long),
and the utf-8 library already uses that type.
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Helps to ensure that 'luaO_pushvfstring' is being called correctly,
with an error check after closing the vararg list with 'va_end'.
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All calls to 'luaK_semerror' were using 'luaO_pushfstring' to create
the error messages.
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In generational collection, objects marked as touched1 stay in gray
lists between collections. This commit fixes a bug introduced in
commit 808976bb59.
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'pushglobalfuncname' can be quite slow (as it traverses all globals and
all loaded modules), so try first to get a name from the code.
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It can be a little slower, but only for quite large stacks and moreover
stack reallocation is not a common operation. With no strong contrary
reason, it is better to follow the standard.
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When computing the Mersenne number, instead of spreading 1's a fixed
number of times (with shifts of 1, 2, 4, 8, 16, and 32), spread only
until the number becomes a Mersenne number.
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To avoid complains from some tools, the addition when computing
math.random(n,m), which is computed as n + random(0, m - n), should
use unsigned integers.
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Small changes in test library:
- execute mode added to 'all.lua';
- more information about subtypes (tags) when printing a stack.
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New function 'resetCI' resets the CallInfo list of a thread, ensuring
a proper state when creating a new thread, closing a thread, or
closing a state, so that we can run code after that. (When closing a
thread, we need to run its __close metamethods; when closing a
state, we need to run its __close metamethods and its finalizers.)
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The string "_ENV" is erroneously identified as a variable _ENV,
so that results from a field is classified as a global.
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If a metatable is a weak table, its __newindex field could be collected
by an emergency collection while being used in 'luaV_finishset'. (This
bug has similarities with bug 5.3.2-1, fixed in commit a272fa66.)
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This function can be called unprotected, so it should not raise any
kind of errors. (It could raise a memory-allocation error when creating
a message).
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All test files refer to the main copyright notice in 'lua.h'.
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