fatal error C1060: compiler is out of heap space (again)

Sprezzatura

Good news! It's working!

The solution was to upgrade from VS 2022 ver. 17.13, to ver. 17.14.
I tried getting VS to update itself, but it locked up and wiped itself. I had to download and re-install VS 17.14.

Here's the kicker: I got the suggestion from OpenAI/ChatGPT!

I'm an AI skeptic, but I have to give credit where it's due.

Also, ChatGPT suggested "-bigobj", but that didn't make a difference.

A sincere thanks to Christian and hskoglund from a 77-year old, half-blind hack :o)

SimonSchroeder

Just as an aside (since I'm a little late to the party): You should turn on C++17 in the .pro file with the line

CONFIG += c++17

Sprezzatura

@SimonSchroeder I do have that included:

versionAtLeast(QT_VERSION, 6.0.0) {
	CONFIG += c++17	# Fails with Qt 5.13 
	QMAKE_CFLAGS += -std:c++17                 # required for Qt 6
}

Sprezzatura

Interesting update: I got the error again, appearing at random after days of successful compilation.

I terminated Firefox, the problem went away!

SimonSchroeder

I occasionally have this problem, too. Here's what I have figured out: The task manager shows memory "in use" and "committed" memory. It's the committed memory that is of importance: Committed memory means that through allocations this amount of memory has been promised to some software, but the corresponding memory pages have not been accessed, yet (which is why memory "in use" can be lower). The reason why this memory is not available is because it was already allocated. This means that committed memory must be available at any time (because it is after allocation the program cannot figure out anymore that it would not have this memory, so it must be there). Once the committed memory is full, nothing works anymore (even when memory "in use" shows that you still have 32 GB left). This is why closing Firefox (which usually uses up a lot of memory) helped. Rebooting your computer also helps.

Basically, "memory in use" is a useless metric in Windows 11. The only thing that matters is committed memory. (You can find programs that use a lot of committed memory if you select "Details" on the left pane of the task manager.)

BTW, does anybody know something like a little widget for Windows 11 that shows committed memory? I would like to have an eye on this. Otherwise Windows will reboot like every other week or so because it ran out of memory (while memory "in use" still shows 32 GB left).

JonB

@SimonSchroeder said in fatal error C1060: compiler is out of heap space (again):

BTW, does anybody know something like a little widget for Windows 11 that shows committed memory? I would like to have an eye on this.

Can't you write this yourself with Qt? :)

ollarch

@Sprezzatura I had the same problem. I have 3 simultaneous Visual Studio 2022 instances and Firefox with a lot of processes and huge memory usage. Another way to solve this is to limit the number of processors used to compile the solution as it will use less memory due less parallel compilation : Tools > Options > Project and solutions > Compilation and execution > Max number of parallel compilations ---> set it to a lower value.

Taytoo

@Christian-Ehrlicher said in fatal error C1060: compiler is out of heap space (again):

@Sprezzatura said in fatal error C1060: compiler is out of heap space (again):

Any suggestions?

Use a 64bit compiler even when you compile for 32bits.

I'm running into this error while compiling a large resource file (it has a single large resource). How do I check if my project is using 64-bit compiler on VS2026? fyi, my app is 32-bit

Kent-Dorfman

seem like you all are trying to treat the symptom and not the underlying cause. these types of problems are often the result of an #include that is cyclic because it does not have a proper macro guard around it. It is always much more convenient to blame the "out of date" toolchain, when in reality the problems are usually PEBCAK (problem exists between chain and keyboard) ;^)

Anyway, if it were my assignment I'd be looking for programmatic problems instead of toolchain issues.

Taytoo

In my case its a large resource file. I can make it work when I enable Two-Pass in Qt Resource compiler but sometimes it fails with error <resourcefilename> object file not found. So trying to make it work without Two-Pass enabled.

Taytoo

Figured it out! For visual studio,

Go to Project properties -> Advanced (left menu) -> Preferred Build Tool Architecture. It'll be set to Default, which is x86. Set it to x64

now no more compiler is out of heap space error. More Info